[469] | 1 | ///////////////////////////////////////////////////////////////////////////////////////// |
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[407] | 2 | // File : ksh.c |
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| 3 | // Date : October 2017 |
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| 4 | // Author : Alain Greiner |
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[469] | 5 | ///////////////////////////////////////////////////////////////////////////////////////// |
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[457] | 6 | // This application implements a minimal shell for ALMOS-MKH. |
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| 7 | // |
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| 8 | // This user KSH process contains two POSIX threads: |
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[446] | 9 | // - the "main" thread contains the infinite loop implementing |
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[469] | 10 | // the children processes termination monitoring, using the wait syscall. |
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| 11 | // - the "interactive" thread contains the infinite loop implementing the command |
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| 12 | // interpreter attached to the TXT terminal, and handling one KSH command |
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| 13 | // per iteration. |
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[457] | 14 | // |
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[469] | 15 | // The children processes are created by the <load> command, and are |
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[457] | 16 | // attached to the same TXT terminal as the KSH process itself. |
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[469] | 17 | // A child process can be lauched in foreground or in background: |
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| 18 | // . when the child process is running in foreground, the KSH process loses |
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| 19 | // the TXT terminal ownership, that is transfered to the child process. |
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| 20 | // . when the child process is running in background: the KSH process keeps |
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| 21 | // the TXT terminal ownership. |
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| 22 | // |
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| 23 | // A semaphore is used to synchronize the two KSH threads. At each iteration, |
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| 24 | // the interactive thread check the semaphore (with a sem_wait). It blocks |
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| 25 | // and deschedules, if the KSH process loosed the TXT ownership (after a load, |
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| 26 | // or for any other cause. It unblocks with the following policy: |
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| 27 | // . if the command is "not a load", the semaphore is incremented by the |
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| 28 | // cmd_***() function when the command is completed, to allow the KSH interactive() |
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| 29 | // function to get the next command in the while loop. |
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| 30 | // . if the command is a "load without &", the TXT is given to the NEW process by the |
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| 31 | // execve() syscall, and is released to the KSH process when NEW process terminates. |
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| 32 | // The KSH process is notified and the KSH main() function increments the semahore |
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| 33 | // to allow the KSH interactive() function to handle commands. |
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| 34 | // . if the command is a "load with &", the cmd_load() function returns the TXT |
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| 35 | // to the KSH process and increment the semaphore, when the parent KSH process |
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| 36 | // returns from the fork() syscall. |
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| 37 | ///////////////////////////////////////////////////////////////////////////////////////// |
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[230] | 38 | |
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| 39 | #include <stdio.h> |
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| 40 | #include <stdlib.h> |
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| 41 | #include <string.h> |
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[444] | 42 | #include <sys/wait.h> |
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| 43 | #include <signal.h> |
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| 44 | #include <unistd.h> |
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[445] | 45 | #include <almosmkh.h> |
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[457] | 46 | #include <semaphore.h> |
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[230] | 47 | |
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[407] | 48 | #define CMD_MAX_SIZE (256) // max number of characters in one command |
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[436] | 49 | #define LOG_DEPTH (32) // max number of registered commands |
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[407] | 50 | #define MAX_ARGS (32) // max number of arguments in a command |
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| 51 | #define FIFO_SIZE (1024) // FIFO depth for recursive ls |
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[230] | 52 | |
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[469] | 53 | #define KSH_DEBUG 0 |
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| 54 | #define CMD_LOAD_DEBUG 0 |
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[457] | 55 | |
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[469] | 56 | ////////////////////////////////////////////////////////////////////////////////////////// |
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[407] | 57 | // Structures |
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[469] | 58 | ////////////////////////////////////////////////////////////////////////////////////////// |
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[230] | 59 | |
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[407] | 60 | // one entry in the registered commands array |
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| 61 | typedef struct log_entry_s |
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| 62 | { |
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| 63 | char buf[CMD_MAX_SIZE]; |
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| 64 | unsigned int count; |
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| 65 | } |
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| 66 | log_entry_t; |
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[230] | 67 | |
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[407] | 68 | // one entry in the supported command types array |
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| 69 | typedef struct ksh_cmd_s |
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| 70 | { |
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| 71 | char * name; |
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| 72 | char * desc; |
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| 73 | void (*fn)( int , char ** ); |
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| 74 | } |
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| 75 | ksh_cmd_t; |
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| 76 | |
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| 77 | |
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[469] | 78 | ////////////////////////////////////////////////////////////////////////////////////////// |
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[230] | 79 | // Global Variables |
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[469] | 80 | ////////////////////////////////////////////////////////////////////////////////////////// |
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[230] | 81 | |
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[407] | 82 | ksh_cmd_t cmd[]; // array of supported commands |
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[230] | 83 | |
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[407] | 84 | log_entry_t log_entries[LOG_DEPTH]; // array of registered commands |
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[230] | 85 | |
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[407] | 86 | unsigned int ptw; // write pointer in log_entries[] |
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| 87 | unsigned int ptr; // read pointer in log_entries[] |
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[230] | 88 | |
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[457] | 89 | pthread_attr_t attr; // interactive thread attributes |
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[446] | 90 | |
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[457] | 91 | sem_t semaphore; // block interactive thread when zero |
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| 92 | |
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[469] | 93 | ////////////////////////////////////////////////////////////////////////////////////////// |
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[230] | 94 | // Shell Commands |
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[469] | 95 | ////////////////////////////////////////////////////////////////////////////////////////// |
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[230] | 96 | |
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[407] | 97 | ///////////////////////////////////////////// |
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| 98 | static void cmd_cat( int argc , char **argv ) |
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[230] | 99 | { |
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[407] | 100 | char * path; |
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[230] | 101 | |
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[407] | 102 | if (argc != 2) |
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| 103 | { |
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[409] | 104 | printf(" usage: cat pathname\n"); |
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[230] | 105 | return; |
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| 106 | } |
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[407] | 107 | |
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[230] | 108 | path = argv[1]; |
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| 109 | |
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[409] | 110 | printf(" error: not implemented yet\n"); |
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[407] | 111 | |
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| 112 | /* |
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| 113 | // open the file |
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| 114 | fd = open( path , O_RDONLY , 0 ); |
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| 115 | if (fd < 0) |
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| 116 | { |
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[409] | 117 | printf(" error: cannot open %s\n", path); |
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[230] | 118 | goto exit; |
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| 119 | } |
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| 120 | |
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[407] | 121 | // get file size |
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| 122 | if (stat(path, &st) == -1) |
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| 123 | { |
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[409] | 124 | printf(" error: cannot stat %s\n", path); |
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[230] | 125 | goto exit; |
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| 126 | } |
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| 127 | if (S_ISDIR(st.st_mode)) { |
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[409] | 128 | printf(" error: %s is a directory\n", path); |
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[230] | 129 | goto exit; |
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| 130 | } |
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| 131 | size = st.st_size; |
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| 132 | |
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[407] | 133 | // mmap the file |
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[230] | 134 | buf = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0); |
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| 135 | if (buf == NULL || buf == (char *)-1) { |
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[409] | 136 | printf(" error: cannot map %s\n", path); |
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[230] | 137 | goto exit; |
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| 138 | } |
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| 139 | |
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[446] | 140 | // set terminating '0' |
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[230] | 141 | buf[size-1] = 0; |
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| 142 | |
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[407] | 143 | // display the file content |
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[230] | 144 | printf("%s", buf); |
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| 145 | |
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| 146 | exit: |
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[407] | 147 | if (buf != NULL) munmap(buf, size); |
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| 148 | if (fd >= 0) close(fd); |
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| 149 | */ |
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[230] | 150 | |
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[457] | 151 | // release semaphore to get next command |
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| 152 | sem_post( &semaphore ); |
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| 153 | |
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[407] | 154 | } // end cmd_cat() |
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| 155 | |
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| 156 | //////////////////////////////////////////// |
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| 157 | static void cmd_cd( int argc , char **argv ) |
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| 158 | { |
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| 159 | char * path; |
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| 160 | |
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| 161 | if (argc != 2) |
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| 162 | { |
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[409] | 163 | printf(" usage: cd pathname\n"); |
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[407] | 164 | return; |
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| 165 | } |
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| 166 | |
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| 167 | path = argv[1]; |
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| 168 | |
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[409] | 169 | printf(" error: not implemented yet\n"); |
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[407] | 170 | |
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[457] | 171 | // release semaphore to get next command |
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| 172 | sem_post( &semaphore ); |
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[407] | 173 | |
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| 174 | } // end cmd_cd() |
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| 175 | |
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| 176 | ///////////////////////////////////////// |
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[230] | 177 | static void cmd_cp(int argc, char **argv) |
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| 178 | { |
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[407] | 179 | // int src_fd = -1, dst_fd = -1; |
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| 180 | // char *srcpath, *dstpath; |
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| 181 | // struct stat st; |
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| 182 | // size_t size, i; |
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| 183 | // char buf[1024]; |
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[230] | 184 | |
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[407] | 185 | if (argc != 3) |
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| 186 | { |
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[409] | 187 | printf(" usage: cp src_pathname dst_pathname\n"); |
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[230] | 188 | return; |
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| 189 | } |
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| 190 | |
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[409] | 191 | printf(" error: not implemented yet\n"); |
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[407] | 192 | |
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| 193 | /* |
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[230] | 194 | srcpath = argv[1]; |
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| 195 | dstpath = argv[2]; |
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| 196 | |
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[407] | 197 | // open the src file |
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[230] | 198 | src_fd = open(srcpath, O_RDONLY, 0); |
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| 199 | if (src_fd < 0) { |
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[409] | 200 | printf(" error: cannot open %s / err = %d\n", srcpath, errno); |
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[230] | 201 | goto exit; |
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| 202 | } |
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| 203 | |
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[407] | 204 | // get file size |
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[230] | 205 | if (stat(srcpath, &st) == -1) { |
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[409] | 206 | printf(" error: cannot stat %s\n", srcpath); |
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[230] | 207 | goto exit; |
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| 208 | } |
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| 209 | if (S_ISDIR(st.st_mode)) { |
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[409] | 210 | printf(" error: %s is a directory\n", srcpath); |
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[230] | 211 | goto exit; |
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| 212 | } |
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| 213 | size = st.st_size; |
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| 214 | |
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[407] | 215 | // open the dst file |
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[230] | 216 | dst_fd = open(dstpath, O_CREAT|O_TRUNC|O_RDWR, 0); |
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| 217 | if (dst_fd < 0) { |
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[409] | 218 | printf(" error: cannot open %s / err = %d\n", dstpath, errno); |
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[230] | 219 | goto exit; |
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| 220 | } |
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| 221 | if (stat(dstpath, &st) == -1) { |
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[409] | 222 | printf(" error: cannot stat %s\n", dstpath); |
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[230] | 223 | goto exit; |
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| 224 | } |
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| 225 | if (S_ISDIR(st.st_mode)) { |
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[409] | 226 | printf(" error: %s is a directory\n", dstpath); |
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[230] | 227 | goto exit; |
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| 228 | } |
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| 229 | |
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| 230 | i = 0; |
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| 231 | while (i < size) |
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| 232 | { |
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| 233 | size_t rlen = (size - i < 1024 ? size - i : 1024); |
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| 234 | size_t wlen; |
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| 235 | ssize_t ret; |
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| 236 | |
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[407] | 237 | // read the source |
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[230] | 238 | ret = read(src_fd, buf, rlen); |
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| 239 | if (ret == -1) { |
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[409] | 240 | printf(" error: cannot read from file %s\n", srcpath); |
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[230] | 241 | goto exit; |
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| 242 | } |
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| 243 | rlen = (size_t)ret; |
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| 244 | |
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[407] | 245 | // write to the destination |
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[230] | 246 | ret = write(dst_fd, buf, rlen); |
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| 247 | if (ret == -1) { |
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[409] | 248 | printf(" error: cannot write to file %s\n", dstpath); |
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[230] | 249 | goto exit; |
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| 250 | } |
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| 251 | wlen = (size_t)ret; |
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| 252 | |
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[407] | 253 | // check |
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[230] | 254 | if (wlen != rlen) { |
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[409] | 255 | printf(" error: cannot write on device\n"); |
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[230] | 256 | goto exit; |
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| 257 | } |
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| 258 | |
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| 259 | i += rlen; |
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| 260 | } |
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| 261 | |
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| 262 | exit: |
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[407] | 263 | if (src_fd >= 0) close(src_fd); |
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| 264 | if (dst_fd >= 0) close(dst_fd); |
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| 265 | */ |
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[230] | 266 | |
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[457] | 267 | // release semaphore to get next command |
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| 268 | sem_post( &semaphore ); |
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| 269 | |
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[407] | 270 | } // end cmd_cp() |
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| 271 | |
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[436] | 272 | ///////////////////////////////////////////////// |
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| 273 | static void cmd_display( int argc , char **argv ) |
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| 274 | { |
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| 275 | unsigned int cxy; |
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| 276 | unsigned int lid; |
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| 277 | unsigned int pid; |
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| 278 | unsigned int txt_id; |
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| 279 | |
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| 280 | if( strcmp( argv[1] , "vmm" ) == 0 ) |
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| 281 | { |
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[442] | 282 | if( argc != 4 ) |
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[436] | 283 | { |
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[442] | 284 | printf(" usage: display vmm cxy pid\n"); |
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[436] | 285 | return; |
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| 286 | } |
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| 287 | |
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[442] | 288 | cxy = atoi(argv[2]); |
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| 289 | pid = atoi(argv[3]); |
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[436] | 290 | |
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[442] | 291 | if( display_vmm( cxy , pid ) ) |
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[436] | 292 | { |
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[442] | 293 | printf(" error: no process %x in cluster %x\n", pid , cxy ); |
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[436] | 294 | } |
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| 295 | } |
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| 296 | else if( strcmp( argv[1] , "sched" ) == 0 ) |
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| 297 | { |
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| 298 | if( argc != 4 ) |
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| 299 | { |
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| 300 | printf(" usage: display sched cxy lid\n"); |
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| 301 | return; |
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| 302 | } |
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| 303 | |
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| 304 | cxy = atoi(argv[2]); |
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| 305 | lid = atoi(argv[3]); |
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| 306 | |
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| 307 | if( display_sched( cxy , lid ) ) |
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| 308 | { |
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| 309 | printf(" error: illegal arguments cxy = %x / lid = %d\n", cxy, lid ); |
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| 310 | } |
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| 311 | } |
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| 312 | else if( strcmp( argv[1] , "process" ) == 0 ) |
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| 313 | { |
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| 314 | if( argc != 3 ) |
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| 315 | { |
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| 316 | printf(" usage: display process cxy\n"); |
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| 317 | return; |
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| 318 | } |
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| 319 | |
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| 320 | cxy = atoi(argv[2]); |
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| 321 | |
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| 322 | if( display_cluster_processes( cxy ) ) |
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| 323 | { |
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| 324 | printf(" error: illegal argument cxy = %x\n", cxy ); |
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| 325 | } |
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| 326 | } |
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| 327 | else if( strcmp( argv[1] , "txt" ) == 0 ) |
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| 328 | { |
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| 329 | if( argc != 3 ) |
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| 330 | { |
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| 331 | printf(" usage: display txt txt_id\n"); |
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| 332 | return; |
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| 333 | } |
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| 334 | |
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| 335 | txt_id = atoi(argv[2]); |
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| 336 | |
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| 337 | if( display_txt_processes( txt_id ) ) |
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| 338 | { |
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[458] | 339 | printf(" error: illegal argument txt_id = %d\n", txt_id ); |
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[436] | 340 | } |
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| 341 | } |
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| 342 | else if( strcmp( argv[1] , "vfs" ) == 0 ) |
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| 343 | { |
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| 344 | if( argc != 2 ) |
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| 345 | { |
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| 346 | printf(" usage: display vfs\n"); |
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| 347 | return; |
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| 348 | } |
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| 349 | |
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| 350 | display_vfs(); |
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| 351 | } |
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| 352 | else if( strcmp( argv[1] , "chdev" ) == 0 ) |
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| 353 | { |
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| 354 | if( argc != 2 ) |
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| 355 | { |
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| 356 | printf(" usage: display chdev\n"); |
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| 357 | return; |
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| 358 | } |
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| 359 | |
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| 360 | display_chdev(); |
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| 361 | } |
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[445] | 362 | else if( strcmp( argv[1] , "dqdt" ) == 0 ) |
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| 363 | { |
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| 364 | if( argc != 2 ) |
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| 365 | { |
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| 366 | printf(" usage: display dqdt\n"); |
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| 367 | return; |
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| 368 | } |
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| 369 | |
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| 370 | display_dqdt(); |
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| 371 | } |
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[436] | 372 | else |
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| 373 | { |
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| 374 | printf(" usage: display (vmm/sched/process/vfs/chdev/txt) [arg2] [arg3]\n"); |
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| 375 | } |
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[457] | 376 | |
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| 377 | // release semaphore to get next command |
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| 378 | sem_post( &semaphore ); |
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| 379 | |
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[436] | 380 | } // end cmd_display() |
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| 381 | |
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[427] | 382 | ///////////////////////////////////////// |
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| 383 | static void cmd_fg(int argc, char **argv) |
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| 384 | { |
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| 385 | unsigned int pid; |
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| 386 | |
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| 387 | if (argc != 2) |
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| 388 | { |
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| 389 | printf(" usage: %s pid\n", argv[0]); |
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| 390 | return; |
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| 391 | } |
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| 392 | |
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| 393 | pid = atoi( argv[1] ); |
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| 394 | |
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| 395 | if( pid == 0 ) |
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| 396 | { |
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[442] | 397 | printf(" error: PID cannot be 0\n" ); |
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[427] | 398 | } |
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| 399 | |
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| 400 | if( fg( pid ) ) |
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| 401 | { |
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| 402 | printf(" error: cannot find process %x\n", pid ); |
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| 403 | } |
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[457] | 404 | |
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| 405 | // release semaphore to get next command |
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| 406 | sem_post( &semaphore ); |
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| 407 | |
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[436] | 408 | } // end cmd_fg() |
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[427] | 409 | |
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[407] | 410 | ////////////////////////////////////////////// |
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| 411 | static void cmd_help( int argc , char **argv ) |
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[230] | 412 | { |
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[407] | 413 | unsigned int i; |
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[230] | 414 | |
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[407] | 415 | if (argc != 1) |
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| 416 | { |
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[409] | 417 | printf(" usage: %s\n", argv[0]); |
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[230] | 418 | return; |
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| 419 | } |
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| 420 | |
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| 421 | printf("available commands:\n"); |
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[407] | 422 | for (i = 0 ; cmd[i].name ; i++) |
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| 423 | { |
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[230] | 424 | printf("\t%s\t : %s\n", cmd[i].name , cmd[i].desc); |
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| 425 | } |
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[457] | 426 | |
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| 427 | // release semaphore to get next command |
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| 428 | sem_post( &semaphore ); |
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| 429 | |
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[407] | 430 | } // end cmd_help() |
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[230] | 431 | |
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[407] | 432 | ////////////////////////////////////////////// |
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| 433 | static void cmd_kill( int argc , char **argv ) |
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[230] | 434 | { |
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[407] | 435 | unsigned int pid; |
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[230] | 436 | |
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[407] | 437 | if (argc != 2) |
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| 438 | { |
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[409] | 439 | printf(" usage: %s pid\n", argv[0]); |
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[230] | 440 | return; |
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| 441 | } |
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| 442 | |
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[427] | 443 | pid = atoi( argv[1] ); |
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[230] | 444 | |
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[427] | 445 | if( pid == 0 ) |
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| 446 | { |
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[440] | 447 | printf(" error: kernel process 0 cannot be killed\n" ); |
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[427] | 448 | } |
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| 449 | |
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[416] | 450 | if( kill( pid , SIGKILL ) ) |
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[407] | 451 | { |
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[440] | 452 | printf(" error: process %x cannot be killed\n", pid ); |
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[230] | 453 | } |
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[457] | 454 | |
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| 455 | // release semaphore to get next command |
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| 456 | sem_post( &semaphore ); |
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| 457 | |
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[407] | 458 | } // end cmd_kill() |
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[230] | 459 | |
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[407] | 460 | ////////////////////////////////////////////// |
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| 461 | static void cmd_load( int argc , char **argv ) |
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[230] | 462 | { |
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[436] | 463 | int ret_fork; // return value from fork |
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| 464 | int ret_exec; // return value from exec |
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| 465 | unsigned int ksh_pid; // KSH process PID |
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| 466 | char * pathname; // path to .elf file |
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| 467 | unsigned int background; // background execution if non zero |
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[407] | 468 | |
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[427] | 469 | if( (argc < 2) || (argc > 3) ) |
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[407] | 470 | { |
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[469] | 471 | printf(" usage: %s pathname [&] / argc = %d\n", argv[0], argc ); // @@@ |
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[407] | 472 | return; |
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| 473 | } |
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| 474 | |
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| 475 | pathname = argv[1]; |
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| 476 | |
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[427] | 477 | if( argc == 3 ) background = (argv[2][0] == '&'); |
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[434] | 478 | else background = 0; |
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[427] | 479 | |
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[434] | 480 | // get KSH process PID |
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| 481 | ksh_pid = getpid(); |
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[407] | 482 | |
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[469] | 483 | #if CMD_LOAD_DEBUG |
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| 484 | long long unsigned cycle; |
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| 485 | get_cycle( &cycle ); |
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| 486 | printf("\n@@@ %s : KSH PID %x before fork / path %s / background %d / cycle %d\n", |
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| 487 | __FUNCTION__, ksh_pid, argv[1], background, (int)cycle ); |
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[457] | 488 | #endif |
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| 489 | |
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[434] | 490 | // KSH process fork CHILD process |
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[436] | 491 | ret_fork = fork(); |
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[434] | 492 | |
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[457] | 493 | if ( ret_fork < 0 ) // it is a failure reported to KSH |
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[407] | 494 | { |
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[434] | 495 | printf(" error: ksh process unable to fork\n"); |
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[440] | 496 | return; |
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[434] | 497 | } |
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[457] | 498 | else if (ret_fork == 0) // it is the CHILD process |
---|
[434] | 499 | { |
---|
[469] | 500 | |
---|
| 501 | #if CMD_LOAD_DEBUG |
---|
| 502 | get_cycle( &cycle ); |
---|
| 503 | printf("\n@@@ %s : CHILD_PID %x after fork, before exec / cycle %d\n", |
---|
| 504 | __FUNCTION__ , getpid(), (int)cycle ); |
---|
| 505 | #endif |
---|
| 506 | |
---|
[434] | 507 | // CHILD process exec NEW process |
---|
[444] | 508 | ret_exec = execve( pathname , NULL , NULL ); |
---|
[434] | 509 | |
---|
[469] | 510 | #if CMD_LOAD_DEBUG |
---|
| 511 | get_cycle( &cycle ); |
---|
| 512 | printf("\n@@@ %s : CHILD_PID %x after exec / ret_exec %d / cycle %d\n", |
---|
| 513 | __FUNCTION__ , getpid(), ret_exec, (int)cycle ); |
---|
| 514 | #endif |
---|
| 515 | |
---|
[441] | 516 | // this is only executed in case of exec failure |
---|
[436] | 517 | if( ret_exec ) |
---|
[409] | 518 | { |
---|
[441] | 519 | printf(" error: child process unable to exec <%s>\n", pathname ); |
---|
| 520 | exit( 0 ); |
---|
[436] | 521 | } |
---|
| 522 | } |
---|
[457] | 523 | else // it is the KSH process : ret_fork is the new process PID |
---|
[436] | 524 | { |
---|
| 525 | |
---|
[469] | 526 | #if CMD_LOAD_DEBUG |
---|
| 527 | get_cycle( &cycle ); |
---|
| 528 | printf("\n@@@ %s : KSH_PID %x after fork / ret_fork %x / cycle %d\n", |
---|
| 529 | __FUNCTION__, getpid(), ret_fork, (int)cycle ); |
---|
[457] | 530 | #endif |
---|
| 531 | |
---|
[469] | 532 | if( background ) // child in background => KSH must keep TXT ownership |
---|
[457] | 533 | { |
---|
| 534 | // execve() tranfered TXT ownership to child => give it back to KSH |
---|
| 535 | fg( ksh_pid ); |
---|
| 536 | |
---|
| 537 | // release semaphore to get next command |
---|
| 538 | sem_post( &semaphore ); |
---|
| 539 | } |
---|
[436] | 540 | } |
---|
[407] | 541 | } // end cmd_load |
---|
| 542 | |
---|
| 543 | ///////////////////////////////////////////// |
---|
| 544 | static void cmd_log( int argc , char **argv ) |
---|
| 545 | { |
---|
| 546 | unsigned int i; |
---|
| 547 | |
---|
[230] | 548 | printf("--- registered commands ---\n"); |
---|
[407] | 549 | for (i = 0; i < LOG_DEPTH; i++) |
---|
| 550 | { |
---|
[436] | 551 | printf(" - %d\t: %s\n", i, &log_entries[i].buf); |
---|
[230] | 552 | } |
---|
| 553 | |
---|
[457] | 554 | // release semaphore to get next command |
---|
| 555 | sem_post( &semaphore ); |
---|
| 556 | |
---|
| 557 | } // end cmd_log() |
---|
| 558 | |
---|
| 559 | |
---|
[407] | 560 | //////////////////////////////////////////// |
---|
| 561 | static void cmd_ls( int argc , char **argv ) |
---|
[230] | 562 | { |
---|
[407] | 563 | char * path; |
---|
[230] | 564 | |
---|
[407] | 565 | // struct dirent * file; |
---|
| 566 | // DIR *dir; |
---|
| 567 | |
---|
| 568 | if (argc == 1) |
---|
| 569 | { |
---|
[230] | 570 | path = "."; |
---|
[407] | 571 | } |
---|
| 572 | else if (argc == 2) |
---|
| 573 | { |
---|
[230] | 574 | path = argv[1]; |
---|
[407] | 575 | } |
---|
| 576 | else |
---|
| 577 | { |
---|
[409] | 578 | printf(" usage: ls [path]\n"); |
---|
[230] | 579 | return; |
---|
| 580 | } |
---|
| 581 | |
---|
[409] | 582 | printf(" error: not implemented yet\n"); |
---|
[407] | 583 | /* |
---|
| 584 | dir = opendir( path ); |
---|
[230] | 585 | while ((file = readdir(dir)) != NULL) |
---|
| 586 | { |
---|
| 587 | printf(" %s\n", file->d_name); |
---|
| 588 | } |
---|
| 589 | closedir(dir); |
---|
[407] | 590 | */ |
---|
[230] | 591 | |
---|
[457] | 592 | // release semaphore to get next command |
---|
| 593 | sem_post( &semaphore ); |
---|
| 594 | |
---|
| 595 | } // end cmd_ls() |
---|
| 596 | |
---|
[407] | 597 | /////////////////////////////////////////////// |
---|
| 598 | static void cmd_mkdir( int argc , char **argv ) |
---|
[230] | 599 | { |
---|
[407] | 600 | char * pathname; |
---|
[230] | 601 | |
---|
[407] | 602 | if (argc != 2) |
---|
| 603 | { |
---|
[409] | 604 | printf(" usage: mkdir pathname\n"); |
---|
[230] | 605 | return; |
---|
| 606 | } |
---|
| 607 | |
---|
[407] | 608 | pathname = argv[1]; |
---|
[230] | 609 | |
---|
[409] | 610 | printf(" error: not implemented yet\n"); |
---|
[230] | 611 | |
---|
[457] | 612 | // release semaphore to get next command |
---|
| 613 | sem_post( &semaphore ); |
---|
| 614 | |
---|
| 615 | } // end cmd_mkdir() |
---|
| 616 | |
---|
[407] | 617 | //////////////////////////////////////////// |
---|
| 618 | static void cmd_mv( int argc , char **argv ) |
---|
[230] | 619 | { |
---|
[407] | 620 | |
---|
[230] | 621 | if (argc < 3) |
---|
| 622 | { |
---|
| 623 | printf(" usage : %s src_pathname dst_pathname\n", argv[0]); |
---|
| 624 | return; |
---|
| 625 | } |
---|
| 626 | |
---|
[409] | 627 | printf(" error: not implemented yet\n"); |
---|
[407] | 628 | |
---|
[457] | 629 | // release semaphore to get next command |
---|
| 630 | sem_post( &semaphore ); |
---|
[407] | 631 | |
---|
[457] | 632 | } // end cmd_mv |
---|
[230] | 633 | |
---|
[407] | 634 | ///////////////////////////////////////////// |
---|
| 635 | static void cmd_pwd( int argc , char **argv ) |
---|
[230] | 636 | { |
---|
[407] | 637 | char buf[1024]; |
---|
[230] | 638 | |
---|
[407] | 639 | if (argc != 1) |
---|
| 640 | { |
---|
[409] | 641 | printf(" usage: pwd\n"); |
---|
[407] | 642 | return; |
---|
| 643 | } |
---|
| 644 | |
---|
| 645 | if ( getcwd( buf , 1024 ) ) |
---|
| 646 | { |
---|
[409] | 647 | printf(" error: unable to get current directory\n"); |
---|
[407] | 648 | } |
---|
| 649 | else |
---|
| 650 | { |
---|
| 651 | printf("%s\n", buf); |
---|
| 652 | } |
---|
| 653 | |
---|
[457] | 654 | // release semaphore to get next command |
---|
| 655 | sem_post( &semaphore ); |
---|
| 656 | |
---|
| 657 | } // end cmd_pwd() |
---|
| 658 | |
---|
[407] | 659 | //////////////////////////////////////////// |
---|
| 660 | static void cmd_rm( int argc , char **argv ) |
---|
| 661 | { |
---|
| 662 | char * pathname; |
---|
| 663 | |
---|
| 664 | if (argc != 2) |
---|
| 665 | { |
---|
[409] | 666 | printf(" usage: rm pathname\n"); |
---|
[230] | 667 | return; |
---|
| 668 | } |
---|
| 669 | |
---|
[407] | 670 | pathname = argv[1]; |
---|
[230] | 671 | |
---|
[409] | 672 | printf(" error: not implemented yet\n"); |
---|
[407] | 673 | |
---|
[457] | 674 | // release semaphore to get next command |
---|
| 675 | sem_post( &semaphore ); |
---|
[230] | 676 | |
---|
[457] | 677 | } // end_cmd_rm() |
---|
| 678 | |
---|
[407] | 679 | /////////////////////////////////////////////// |
---|
| 680 | static void cmd_rmdir( int argc , char **argv ) |
---|
[230] | 681 | { |
---|
[457] | 682 | // same as cmd_rm() |
---|
[230] | 683 | cmd_rm(argc, argv); |
---|
| 684 | } |
---|
| 685 | |
---|
[442] | 686 | /////////////////////////////////////////////// |
---|
| 687 | static void cmd_trace( int argc , char **argv ) |
---|
| 688 | { |
---|
| 689 | unsigned int cxy; |
---|
| 690 | unsigned int lid; |
---|
| 691 | |
---|
| 692 | if (argc != 3) |
---|
| 693 | { |
---|
| 694 | printf(" usage: trace cxy lid \n"); |
---|
| 695 | return; |
---|
| 696 | } |
---|
| 697 | |
---|
| 698 | cxy = atoi(argv[1]); |
---|
| 699 | lid = atoi(argv[2]); |
---|
| 700 | |
---|
| 701 | if( trace( 1 , cxy , lid ) ) |
---|
| 702 | { |
---|
| 703 | printf(" error: core[%x,%d] not found\n", cxy, lid ); |
---|
| 704 | } |
---|
| 705 | |
---|
[457] | 706 | // release semaphore to get next command |
---|
| 707 | sem_post( &semaphore ); |
---|
| 708 | |
---|
| 709 | } // end cmd_trace |
---|
| 710 | |
---|
[442] | 711 | /////////////////////////////////////////////// |
---|
| 712 | static void cmd_untrace( int argc , char **argv ) |
---|
| 713 | { |
---|
| 714 | unsigned int cxy; |
---|
| 715 | unsigned int lid; |
---|
| 716 | |
---|
| 717 | if (argc != 3) |
---|
| 718 | { |
---|
| 719 | printf(" usage: untrace cxy lid \n"); |
---|
| 720 | return; |
---|
| 721 | } |
---|
| 722 | |
---|
| 723 | cxy = atoi(argv[1]); |
---|
| 724 | lid = atoi(argv[2]); |
---|
| 725 | |
---|
| 726 | if( trace( 0 , cxy , lid ) ) |
---|
| 727 | { |
---|
| 728 | printf(" error: core[%x,%d] not found\n", cxy, lid ); |
---|
| 729 | } |
---|
| 730 | |
---|
[457] | 731 | // release semaphore to get next command |
---|
| 732 | sem_post( &semaphore ); |
---|
| 733 | |
---|
| 734 | } // end cmd_untrace() |
---|
| 735 | |
---|
| 736 | /////////////////////////////////////////////////////////////////////////////////// |
---|
[407] | 737 | // Array of commands |
---|
[457] | 738 | /////////////////////////////////////////////////////////////////////////////////// |
---|
[230] | 739 | |
---|
[407] | 740 | ksh_cmd_t cmd[] = |
---|
[230] | 741 | { |
---|
[435] | 742 | { "cat", "display file content", cmd_cat }, |
---|
| 743 | { "cd", "change current directory", cmd_cd }, |
---|
| 744 | { "cp", "replicate a file in file system", cmd_cp }, |
---|
| 745 | { "fg", "put a process in foreground", cmd_fg }, |
---|
| 746 | { "display", "display vmm/sched/process/vfs/chdev/txt", cmd_display }, |
---|
| 747 | { "load", "load an user application", cmd_load }, |
---|
| 748 | { "help", "list available commands", cmd_help }, |
---|
[457] | 749 | { "kill", "kill a process (all threads)", cmd_kill }, |
---|
[435] | 750 | { "log", "list registered commands", cmd_log }, |
---|
| 751 | { "ls", "list directory entries", cmd_ls }, |
---|
| 752 | { "mkdir", "create a new directory", cmd_mkdir }, |
---|
| 753 | { "mv", "move a file in file system", cmd_mv }, |
---|
| 754 | { "pwd", "print current working directory", cmd_pwd }, |
---|
| 755 | { "rm", "remove a file from file system", cmd_rm }, |
---|
| 756 | { "rmdir", "remove a directory from file system", cmd_rmdir }, |
---|
[442] | 757 | { "trace", "activate trace for a given core", cmd_trace }, |
---|
| 758 | { "untrace", "desactivate trace for a given core", cmd_untrace }, |
---|
[435] | 759 | { NULL, NULL, NULL } |
---|
[230] | 760 | }; |
---|
| 761 | |
---|
[407] | 762 | //////////////////////////////////////////////////////////////////////////////////// |
---|
[457] | 763 | // This function analyses one command (with arguments), executes it, and returns. |
---|
[407] | 764 | //////////////////////////////////////////////////////////////////////////////////// |
---|
[469] | 765 | static void __attribute__ ((noinline)) parse( char * buf ) |
---|
[230] | 766 | { |
---|
| 767 | int argc = 0; |
---|
| 768 | char *argv[MAX_ARGS]; |
---|
| 769 | int i; |
---|
| 770 | int len = strlen(buf); |
---|
| 771 | |
---|
| 772 | // build argc/argv |
---|
[407] | 773 | for (i = 0; i < len; i++) |
---|
| 774 | { |
---|
| 775 | if (buf[i] == ' ') |
---|
| 776 | { |
---|
[230] | 777 | buf[i] = '\0'; |
---|
[407] | 778 | } |
---|
| 779 | else if (i == 0 || buf[i - 1] == '\0') |
---|
| 780 | { |
---|
| 781 | if (argc < MAX_ARGS) |
---|
| 782 | { |
---|
[230] | 783 | argv[argc] = &buf[i]; |
---|
| 784 | argc++; |
---|
| 785 | } |
---|
| 786 | } |
---|
| 787 | } |
---|
| 788 | |
---|
[469] | 789 | // analyse command type |
---|
[407] | 790 | if (argc > 0) |
---|
| 791 | { |
---|
[230] | 792 | int found = 0; |
---|
| 793 | |
---|
| 794 | argv[argc] = NULL; |
---|
| 795 | |
---|
[407] | 796 | // try to match typed command |
---|
[469] | 797 | for (i = 0 ; cmd[i].name ; i++) |
---|
[407] | 798 | { |
---|
| 799 | if (strcmp(argv[0], cmd[i].name) == 0) |
---|
| 800 | { |
---|
[230] | 801 | cmd[i].fn(argc, argv); |
---|
| 802 | found = 1; |
---|
| 803 | break; |
---|
| 804 | } |
---|
| 805 | } |
---|
| 806 | |
---|
[457] | 807 | if (!found) // undefined command |
---|
[407] | 808 | { |
---|
[457] | 809 | printf(" error : undefined command <%s>\n", argv[0]); |
---|
| 810 | |
---|
| 811 | // release semaphore to get next command |
---|
| 812 | sem_post( &semaphore ); |
---|
[230] | 813 | } |
---|
| 814 | } |
---|
[446] | 815 | } // end parse() |
---|
[230] | 816 | |
---|
[446] | 817 | ///////////////////////// |
---|
| 818 | static void interactive() |
---|
[230] | 819 | { |
---|
[469] | 820 | char c; // read character |
---|
| 821 | char buf[CMD_MAX_SIZE]; // buffer for one command |
---|
| 822 | unsigned int end_command; // last character found in a command |
---|
| 823 | unsigned int count; // pointer in command buffer |
---|
| 824 | unsigned int i; // index for loops |
---|
| 825 | unsigned int state; // escape sequence state |
---|
[230] | 826 | |
---|
[469] | 827 | /* This can be used to remove interactive mode |
---|
[457] | 828 | |
---|
[469] | 829 | for( i=1 ; 1 ; i += 2) |
---|
| 830 | { |
---|
| 831 | if( sem_wait( &semaphore ) ) |
---|
| 832 | { |
---|
| 833 | printf("\n[ksh error] cannot found semafore\n" ); |
---|
| 834 | exit( 1 ); |
---|
| 835 | } |
---|
| 836 | else |
---|
| 837 | { |
---|
| 838 | printf("\n[ksh] %d for sort\n", i ); |
---|
| 839 | } |
---|
| 840 | strcpy( buf , "load /bin/user/sort.elf" ); |
---|
| 841 | parse( buf ); |
---|
| 842 | |
---|
| 843 | if( sem_wait( &semaphore ) ) |
---|
| 844 | { |
---|
| 845 | printf("\n[ksh error] cannot found semafore\n" ); |
---|
| 846 | exit( 1 ); |
---|
| 847 | } |
---|
| 848 | else |
---|
| 849 | { |
---|
| 850 | printf("\n[ksh] %d for fft\n", i+1 ); |
---|
| 851 | } |
---|
| 852 | strcpy( buf , "load /bin/user/fft.elf" ); |
---|
| 853 | parse( buf ); |
---|
| 854 | } |
---|
| 855 | |
---|
| 856 | */ |
---|
| 857 | |
---|
[407] | 858 | enum fsm_states |
---|
| 859 | { |
---|
[457] | 860 | NORMAL = 0, |
---|
| 861 | ESCAPE = 1, |
---|
| 862 | BRAKET = 2, |
---|
[230] | 863 | }; |
---|
| 864 | |
---|
[457] | 865 | // This lexical analyser writes one command line in the command buffer. |
---|
| 866 | // It is implemented as a 3 states FSM to handle the following escape sequences: |
---|
[230] | 867 | // - ESC [ A : up arrow |
---|
| 868 | // - ESC [ B : down arrow |
---|
| 869 | // - ESC [ C : right arrow |
---|
| 870 | // - ESC [ D : left arrow |
---|
[407] | 871 | // The three states have the following semantic: |
---|
[230] | 872 | // - NORMAL : no (ESC) character has been found |
---|
| 873 | // - ESCAPE : the character (ESC) has been found |
---|
| 874 | // - BRAKET : the wo characters (ESC,[) have been found |
---|
[436] | 875 | |
---|
[457] | 876 | // external loop on the commands |
---|
| 877 | // the in teractive thread should not exit this loop |
---|
[230] | 878 | while (1) |
---|
| 879 | { |
---|
[457] | 880 | // initialize command buffer |
---|
| 881 | memset( buf, 0x20 , sizeof(buf) ); // TODO useful ? |
---|
| 882 | count = 0; |
---|
| 883 | state = NORMAL; |
---|
[230] | 884 | |
---|
[469] | 885 | // decrement semaphore, and block if the KSH process is not the TXT owner |
---|
| 886 | if ( sem_wait( &semaphore ) ) |
---|
| 887 | { |
---|
| 888 | printf("\n[ksh error] cannot found semafore\n" ); |
---|
| 889 | exit( 1 ); |
---|
| 890 | } |
---|
[407] | 891 | |
---|
[457] | 892 | // display prompt on a new line |
---|
| 893 | printf("\n[ksh] "); |
---|
| 894 | |
---|
| 895 | end_command = 0; |
---|
| 896 | |
---|
| 897 | // internal loop on characters in one command |
---|
| 898 | while( end_command == 0 ) |
---|
| 899 | { |
---|
| 900 | // get one character from TXT_RX |
---|
| 901 | c = (char)getchar(); |
---|
| 902 | |
---|
| 903 | if( c == 0 ) continue; |
---|
| 904 | |
---|
| 905 | if( state == NORMAL ) // we are not in an escape sequence |
---|
| 906 | { |
---|
[230] | 907 | if ((c == '\b') || (c == 0x7F)) // backspace => remove one character |
---|
| 908 | { |
---|
[457] | 909 | if (count > 0) |
---|
| 910 | { |
---|
| 911 | printf("\b \b"); |
---|
| 912 | count--; |
---|
| 913 | } |
---|
[230] | 914 | } |
---|
[457] | 915 | else if (c == '\n') // new line => end of command |
---|
[230] | 916 | { |
---|
[457] | 917 | if (count > 0) // analyse & execute command |
---|
| 918 | { |
---|
| 919 | // complete command with NUL character |
---|
| 920 | buf[count] = 0; |
---|
| 921 | count++; |
---|
[230] | 922 | |
---|
[457] | 923 | // register command in log arrays |
---|
| 924 | strcpy(log_entries[ptw].buf, buf); |
---|
| 925 | log_entries[ptw].count = count; |
---|
| 926 | ptw = (ptw + 1) % LOG_DEPTH; |
---|
| 927 | ptr = ptw; |
---|
[230] | 928 | |
---|
[457] | 929 | // echo character |
---|
| 930 | putchar( c ); |
---|
[230] | 931 | |
---|
[457] | 932 | // call parser to analyse and execute command |
---|
| 933 | parse( buf ); |
---|
| 934 | } |
---|
| 935 | else // no command registered |
---|
[441] | 936 | { |
---|
[457] | 937 | // release semaphore to get next command |
---|
| 938 | sem_post( &semaphore ); |
---|
[441] | 939 | } |
---|
[457] | 940 | |
---|
| 941 | // exit internal loop on characters |
---|
| 942 | end_command = 1; |
---|
| 943 | } |
---|
| 944 | else if (c == '\t') // tabulation => do nothing |
---|
| 945 | { |
---|
| 946 | } |
---|
| 947 | else if (c == (char)0x1B) // ESC => start an escape sequence |
---|
| 948 | { |
---|
| 949 | state = ESCAPE; |
---|
| 950 | } |
---|
| 951 | else // normal character |
---|
[230] | 952 | { |
---|
[457] | 953 | if (count < sizeof(buf) - 1) |
---|
| 954 | { |
---|
| 955 | // register character in command buffer |
---|
| 956 | buf[count] = c; |
---|
| 957 | count++; |
---|
| 958 | |
---|
| 959 | // echo character |
---|
| 960 | putchar( c ); |
---|
[230] | 961 | } |
---|
| 962 | } |
---|
| 963 | } |
---|
[457] | 964 | else if( state == ESCAPE ) |
---|
[230] | 965 | { |
---|
| 966 | if (c == '[') // valid sequence => continue |
---|
| 967 | { |
---|
| 968 | state = BRAKET; |
---|
| 969 | } |
---|
| 970 | else // invalid sequence => do nothing |
---|
| 971 | { |
---|
| 972 | state = NORMAL; |
---|
| 973 | } |
---|
| 974 | } |
---|
[457] | 975 | else if( state == BRAKET ) |
---|
[230] | 976 | { |
---|
| 977 | if (c == 'D') // valid LEFT sequence => move buf pointer left |
---|
| 978 | { |
---|
| 979 | if (count > 0) |
---|
| 980 | { |
---|
| 981 | printf("\b"); |
---|
| 982 | count--; |
---|
| 983 | } |
---|
| 984 | |
---|
| 985 | // get next user char |
---|
| 986 | state = NORMAL; |
---|
| 987 | } |
---|
| 988 | else if (c == 'C') // valid RIGHT sequence => move buf pointer right |
---|
| 989 | { |
---|
| 990 | if (count < sizeof(buf) - 1) |
---|
| 991 | { |
---|
| 992 | printf("%c", buf[count]); |
---|
| 993 | count++; |
---|
| 994 | } |
---|
| 995 | |
---|
| 996 | // get next user char |
---|
| 997 | state = NORMAL; |
---|
| 998 | } |
---|
| 999 | else if (c == 'A') // valid UP sequence => move log pointer backward |
---|
| 1000 | { |
---|
| 1001 | // cancel current command |
---|
| 1002 | for (i = 0; i < count; i++) printf("\b \b"); |
---|
| 1003 | count = 0; |
---|
| 1004 | |
---|
| 1005 | // copy log command into buf |
---|
| 1006 | ptr = (ptr - 1) % LOG_DEPTH; |
---|
| 1007 | strcpy(buf, log_entries[ptr].buf); |
---|
[458] | 1008 | count = log_entries[ptr].count - 1; |
---|
[230] | 1009 | |
---|
| 1010 | // display log command |
---|
| 1011 | printf("%s", buf); |
---|
| 1012 | |
---|
| 1013 | // get next user char |
---|
| 1014 | state = NORMAL; |
---|
| 1015 | } |
---|
| 1016 | else if (c == 'B') // valid DOWN sequence => move log pointer forward |
---|
| 1017 | { |
---|
| 1018 | // cancel current command |
---|
| 1019 | for (i = 0 ; i < count; i++) printf("\b \b"); |
---|
| 1020 | count = 0; |
---|
| 1021 | |
---|
| 1022 | // copy log command into buf |
---|
| 1023 | ptr = (ptr + 1) % LOG_DEPTH; |
---|
| 1024 | strcpy(buf, log_entries[ptr].buf); |
---|
| 1025 | count = log_entries[ptr].count; |
---|
| 1026 | |
---|
| 1027 | // display log command |
---|
| 1028 | printf("%s", buf); |
---|
| 1029 | |
---|
| 1030 | // get next user char |
---|
| 1031 | state = NORMAL; |
---|
| 1032 | } |
---|
| 1033 | else // other character => do nothing |
---|
| 1034 | { |
---|
| 1035 | // get next user char |
---|
| 1036 | state = NORMAL; |
---|
| 1037 | } |
---|
| 1038 | } |
---|
[457] | 1039 | } // end internal while loop on characters |
---|
| 1040 | } // end external while loop on commands |
---|
[446] | 1041 | } // end interactive() |
---|
| 1042 | |
---|
| 1043 | /////////////////////////////////// |
---|
| 1044 | int main( int argc , char *argv[] ) |
---|
| 1045 | { |
---|
| 1046 | unsigned int cxy; // owner cluster identifier for this KSH process |
---|
| 1047 | unsigned int lid; // core identifier for this KSH main thread |
---|
| 1048 | int status; // child process termination status |
---|
[457] | 1049 | int child_pid; // child process identifier |
---|
[469] | 1050 | int parent_pid; // parent process identifier (i.e. this process) |
---|
| 1051 | pthread_t trdid; // interactive thread identifier (unused) |
---|
[457] | 1052 | unsigned int is_owner; // non-zero if KSH process is TXT owner |
---|
[446] | 1053 | |
---|
| 1054 | // initialize log buffer |
---|
| 1055 | memset( &log_entries , 0, sizeof(log_entries)); |
---|
| 1056 | ptw = 0; |
---|
| 1057 | ptr = 0; |
---|
| 1058 | |
---|
[457] | 1059 | // get KSH process pid and core |
---|
| 1060 | parent_pid = getpid(); |
---|
[459] | 1061 | get_core( &cxy , &lid ); |
---|
[457] | 1062 | |
---|
| 1063 | // initializes the semaphore used to unblock the interactive thread |
---|
[469] | 1064 | if ( sem_init( &semaphore , 0 , 1 ) ) |
---|
| 1065 | { |
---|
| 1066 | printf("\n[KSH ERROR] cannot initialize semaphore\n" ); |
---|
| 1067 | exit( 1 ); |
---|
| 1068 | } |
---|
[457] | 1069 | |
---|
[469] | 1070 | printf("\n@@@ in KSH %s : &semaphore = %x\n", __FUNCTION__, &semaphore ); |
---|
| 1071 | |
---|
[446] | 1072 | // initialize interactive thread attributes |
---|
| 1073 | attr.attributes = PT_ATTR_DETACH | PT_ATTR_CLUSTER_DEFINED; |
---|
| 1074 | attr.cxy = cxy; |
---|
| 1075 | |
---|
| 1076 | // lauch the interactive thread |
---|
| 1077 | pthread_create( &trdid, |
---|
| 1078 | &attr, |
---|
| 1079 | &interactive, // entry function |
---|
| 1080 | NULL ); |
---|
| 1081 | |
---|
| 1082 | // enter infinite loop monitoring children processes termination |
---|
| 1083 | while( 1 ) |
---|
| 1084 | { |
---|
[457] | 1085 | // wait children termination |
---|
| 1086 | child_pid = wait( &status ); |
---|
[446] | 1087 | |
---|
[457] | 1088 | #if KSH_DEBUG |
---|
| 1089 | if( WIFEXITED (status) ) printf("\n[KSH] child process %x exited\n" , child_pid ); |
---|
| 1090 | if( WIFSIGNALED(status) ) printf("\n[KSH] child process %x killed\n" , child_pid ); |
---|
| 1091 | if( WIFSTOPPED (status) ) printf("\n[KSH] child process %x stopped\n", child_pid ); |
---|
[446] | 1092 | #endif |
---|
| 1093 | |
---|
[457] | 1094 | // release semaphore if KSH process is TXT owner, to unblock interactive thread |
---|
| 1095 | is_fg( parent_pid , &is_owner ); |
---|
| 1096 | if( is_owner ) sem_post( &semaphore ); |
---|
| 1097 | |
---|
[446] | 1098 | } |
---|
[436] | 1099 | } // end main() |
---|
[230] | 1100 | |
---|
[446] | 1101 | |
---|