[1] | 1 | #include <string.h> |
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| 2 | #include <getopt.h> |
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| 3 | |
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| 4 | static void getopterror(int which) { |
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| 5 | static char error1[]="Unknown option `-x'.\n"; |
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| 6 | static char error2[]="Missing argument for `-x'.\n"; |
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| 7 | if (opterr) { |
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| 8 | if (which) { |
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| 9 | error2[23]=optopt; |
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| 10 | write(2,error2,28); |
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| 11 | } else { |
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| 12 | error1[17]=optopt; |
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| 13 | write(2,error1,22); |
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| 14 | } |
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| 15 | } |
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| 16 | } |
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| 17 | |
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| 18 | int getopt_long_only(int argc, char * const argv[], const char *optstring, |
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| 19 | const struct option *longopts, int *longindex) { |
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| 20 | static int lastidx,lastofs; |
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| 21 | char *tmp,*arg; |
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| 22 | if (optind==0) { optind=1; lastidx=0; } /* whoever started setting optind to 0 should be shot */ |
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| 23 | again: |
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| 24 | if (optind>argc || !argv[optind] || *argv[optind]!='-' || argv[optind][1]==0) |
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| 25 | return -1; |
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| 26 | if (argv[optind][1]=='-' && argv[optind][2]==0) { |
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| 27 | ++optind; |
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| 28 | return -1; |
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| 29 | } |
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| 30 | if (argv[optind][1]=='-') |
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| 31 | arg=argv[optind]+2; |
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| 32 | else |
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| 33 | arg=argv[optind]+1; |
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| 34 | { |
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| 35 | char* max=strchr(arg,'='); |
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| 36 | const struct option* o; |
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| 37 | const struct option* match=0; |
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| 38 | if (!max) max=arg+strlen(arg); |
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| 39 | for (o=longopts; o->name; ++o) { |
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| 40 | size_t tlen=max-arg; |
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| 41 | if (!strncmp(o->name,arg,tlen)) { /* match */ |
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| 42 | if (strlen(o->name)==tlen) { |
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| 43 | match=o; /* perfect match, not just prefix */ |
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| 44 | break; |
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| 45 | } |
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| 46 | if (!match) |
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| 47 | match=o; |
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| 48 | else |
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| 49 | /* Another imperfect match. */ |
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| 50 | match=(struct option*)-1; |
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| 51 | } |
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| 52 | } |
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| 53 | if (match!=(struct option*)-1 && (o=match)) { |
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| 54 | if (longindex) *longindex=o-longopts; |
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| 55 | if (o->has_arg>0) { |
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| 56 | if (*max=='=') |
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| 57 | optarg=max+1; |
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| 58 | else { |
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| 59 | optarg=argv[optind+1]; |
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| 60 | if (!optarg && o->has_arg==1) { /* no argument there */ |
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| 61 | if (*optstring==':') return ':'; |
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| 62 | write(2,"argument required: `",20); |
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| 63 | write(2,arg,(size_t)(max-arg)); |
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| 64 | write(2,"'.\n",3); |
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| 65 | ++optind; |
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| 66 | return '?'; |
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| 67 | } |
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| 68 | ++optind; |
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| 69 | } |
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| 70 | } |
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| 71 | ++optind; |
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| 72 | if (o->flag) |
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| 73 | *(o->flag)=o->val; |
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| 74 | else |
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| 75 | return o->val; |
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| 76 | return 0; |
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| 77 | } |
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| 78 | if (argv[optind][1]!='-') goto shortopt; |
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| 79 | if (*optstring==':') return ':'; |
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| 80 | write(2,"invalid option `",16); |
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| 81 | write(2,arg,(size_t)(max-arg)); |
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| 82 | write(2,"'.\n",3); |
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| 83 | ++optind; |
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| 84 | return '?'; |
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| 85 | } |
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| 86 | shortopt: |
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| 87 | if (lastidx!=optind) { |
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| 88 | lastidx=optind; lastofs=0; |
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| 89 | } |
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| 90 | optopt=argv[optind][lastofs+1]; |
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| 91 | if ((tmp=strchr(optstring,optopt))) { |
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| 92 | if (*tmp==0) { /* apparently, we looked for \0, i.e. end of argument */ |
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| 93 | ++optind; |
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| 94 | goto again; |
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| 95 | } |
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| 96 | if (tmp[1]==':') { /* argument expected */ |
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| 97 | if (tmp[2]==':' || argv[optind][lastofs+2]) { /* "-foo", return "oo" as optarg */ |
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| 98 | if (!*(optarg=argv[optind]+lastofs+2)) optarg=0; |
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| 99 | goto found; |
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| 100 | } |
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| 101 | optarg=argv[optind+1]; |
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| 102 | if (!optarg) { /* missing argument */ |
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| 103 | ++optind; |
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| 104 | if (*optstring==':') return ':'; |
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| 105 | getopterror(1); |
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| 106 | return ':'; |
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| 107 | } |
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| 108 | ++optind; |
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| 109 | } else { |
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| 110 | ++lastofs; |
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| 111 | return optopt; |
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| 112 | } |
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| 113 | found: |
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| 114 | ++optind; |
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| 115 | return optopt; |
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| 116 | } else { /* not found */ |
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| 117 | getopterror(0); |
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| 118 | ++optind; |
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| 119 | return '?'; |
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| 120 | } |
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| 121 | } |
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