1 | /* sigset.c - signal set manipulation functions */ |
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2 | |
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3 | /* Copyright 2002, Red Hat Inc. */ |
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4 | |
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5 | /* Note: these are currently grouped together in one file so that |
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6 | it will override the default version in the libc/unix |
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7 | directory which has grouped all functions in one file. */ |
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8 | |
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9 | /* sigaddset function */ |
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10 | |
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11 | #include <signal.h> |
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12 | #include <bits/sigset.h> |
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13 | #include <errno.h> |
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14 | #include <string.h> |
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15 | #include <machine/weakalias.h> |
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16 | |
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17 | int |
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18 | sigaddset (sigset_t *set, const int signo) |
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19 | { |
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20 | int index, mask; |
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21 | __sigset_t *st = (__sigset_t *)set; |
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22 | |
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23 | if (signo > NSIG) |
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24 | { |
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25 | errno = EINVAL; |
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26 | return -1; |
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27 | } |
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28 | |
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29 | index = (signo - 1) / (8 * sizeof(long)); |
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30 | mask = 1 << ((signo - 1) % (8 * sizeof(long))); |
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31 | |
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32 | st->__val[index] |= mask; |
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33 | return 0; |
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34 | } |
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35 | |
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36 | /* sigdelset function */ |
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37 | |
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38 | int |
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39 | sigdelset (sigset_t *set, const int signo) |
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40 | { |
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41 | int index, mask; |
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42 | __sigset_t *st = (__sigset_t *)set; |
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43 | |
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44 | if (signo > NSIG) |
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45 | { |
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46 | errno = EINVAL; |
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47 | return -1; |
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48 | } |
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49 | |
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50 | index = (signo - 1) / (8 * sizeof(long)); |
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51 | mask = 1 << ((signo - 1) % (8 * sizeof(long))); |
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52 | |
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53 | st->__val[index] &= ~mask; |
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54 | return 0; |
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55 | } |
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56 | |
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57 | /* sigemptyset function */ |
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58 | |
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59 | int |
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60 | sigemptyset (sigset_t *set) |
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61 | { |
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62 | int size = NSIG / 8; |
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63 | __sigset_t *st = (__sigset_t *)set; |
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64 | memset (st->__val, 0, size); |
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65 | return 0; |
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66 | } |
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67 | |
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68 | /* sigfillset function */ |
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69 | |
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70 | int |
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71 | sigfillset (sigset_t *set) |
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72 | { |
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73 | int size = NSIG / 8; |
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74 | __sigset_t *st = (__sigset_t *)set; |
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75 | memset (st->__val, 0xff, size); |
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76 | return 0; |
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77 | } |
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78 | |
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79 | /* sigismember function */ |
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80 | |
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81 | int |
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82 | sigismember (const sigset_t *set, int signo) |
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83 | { |
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84 | int index, mask; |
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85 | __sigset_t *st = (__sigset_t *)set; |
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86 | |
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87 | if (signo > NSIG) |
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88 | { |
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89 | errno = EINVAL; |
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90 | return -1; |
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91 | } |
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92 | |
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93 | index = (signo - 1) / (8 * sizeof(long)); |
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94 | mask = 1 << ((signo - 1) % (8 * sizeof(long))); |
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95 | |
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96 | return (st->__val[index] & mask) != 0; |
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97 | } |
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98 | |
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