projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| af69217f UD |
1 | /* Copyright (C) 1998 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. | |
| 3 | ||
| 4 | The GNU C Library is free software; you can redistribute it and/or | |
| 5 | modify it under the terms of the GNU Library General Public License as | |
| 6 | published by the Free Software Foundation; either version 2 of the | |
| 7 | License, or (at your option) any later version. | |
| 8 | ||
| 9 | The GNU C Library is distributed in the hope that it will be useful, | |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | Library General Public License for more details. | |
| 13 | ||
| 14 | You should have received a copy of the GNU Library General Public | |
| 15 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
| 16 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 17 | Boston, MA 02111-1307, USA. */ | |
| 18 | ||
| 19 | #include <errno.h> | |
| 8619129f UD |
20 | #define __need_NULL |
| 21 | #include <stddef.h> | |
| af69217f UD |
22 | #include <signal.h> |
| 23 | ||
| 24 | ||
| 25 | /* Set the disposition for SIG. */ | |
| 26 | __sighandler_t | |
| 27 | sigset (sig, disp) | |
| 28 | int sig; | |
| 29 | __sighandler_t disp; | |
| 30 | { | |
| 31 | struct sigaction act, oact; | |
| 32 | ||
| 9d141cae | 33 | #ifdef SIG_HOLD |
| af69217f UD |
34 | /* Handle SIG_HOLD first. */ |
| 35 | if (disp == SIG_HOLD) | |
| 36 | { | |
| 37 | sigset_t set; | |
| 38 | ||
| 39 | /* Retrieve current signal set. */ | |
| 40 | if (__sigprocmask (SIG_SETMASK, NULL, &set) < 0) | |
| 41 | return SIG_ERR; | |
| 42 | ||
| 43 | /* Add the specified signal. */ | |
| 44 | if (sigaddset (&set, sig) < 0) | |
| 45 | return SIG_ERR; | |
| 46 | ||
| 47 | /* Set the new mask. */ | |
| 48 | if (__sigprocmask (SIG_SETMASK, &set, NULL) < 0) | |
| 49 | return SIG_ERR; | |
| 50 | ||
| 51 | return SIG_HOLD; | |
| 52 | } | |
| 9d141cae | 53 | #endif /* SIG_HOLD */ |
| af69217f UD |
54 | |
| 55 | /* Check signal extents to protect __sigismember. */ | |
| 56 | if (disp == SIG_ERR || sig < 1 || sig >= NSIG) | |
| 57 | { | |
| 58 | __set_errno (EINVAL); | |
| 59 | return SIG_ERR; | |
| 60 | } | |
| 61 | ||
| 62 | act.sa_handler = disp; | |
| 63 | if (__sigemptyset (&act.sa_mask) < 0) | |
| 64 | return SIG_ERR; | |
| 65 | act.sa_flags = 0; | |
| 66 | if (__sigaction (sig, &act, &oact) < 0) | |
| 67 | return SIG_ERR; | |
| 68 | ||
| 69 | return oact.sa_handler; | |
| 70 | } |