diff options
Diffstat (limited to 'signal')
| -rw-r--r-- | signal/Makefile | 5 | ||||
| -rw-r--r-- | signal/sighold.c | 39 | ||||
| -rw-r--r-- | signal/signal.h | 19 | ||||
| -rw-r--r-- | signal/sigrelse.c | 39 |
4 files changed, 99 insertions, 3 deletions
diff --git a/signal/Makefile b/signal/Makefile index 29aeea5f2b..0642f75718 100644 --- a/signal/Makefile +++ b/signal/Makefile @@ -1,4 +1,4 @@ -# Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc. +# Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98 Free Software Foundation, Inc. # This file is part of the GNU C Library. # The GNU C Library is free software; you can redistribute it and/or @@ -33,7 +33,8 @@ routines := signal raise killpg \ sigreturn \ siggetmask sysv_signal \ sigisempty sigandset sigorset \ - allocrtsig sigtimedwait sigwaitinfo sigqueue + allocrtsig sigtimedwait sigwaitinfo sigqueue \ + sighold sigrelse sigignore sigset tests := tst-signal diff --git a/signal/sighold.c b/signal/sighold.c new file mode 100644 index 0000000000..d2cb537912 --- /dev/null +++ b/signal/sighold.c @@ -0,0 +1,39 @@ +/* Add SIG to the calling process' signal mask. + Copyright (C) 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <signal.h> + +int +sighold (sig) + int sig; +{ + sigset_t set; + + /* Retrieve current signal set. */ + if (__sigprocmask (SIG_SETMASK, NULL, &set) < 0) + return -1; + + /* Add the specified signal. */ + if (sigaddset (&set, sig) < 0) + return -1; + + /* Set the new mask. */ + return __sigprocmask (SIG_SETMASK, &set, NULL); +} diff --git a/signal/signal.h b/signal/signal.h index 589b870806..864a49b6e1 100644 --- a/signal/signal.h +++ b/signal/signal.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc. +/* Copyright (C) 1991,92,93,94,95,96,97,98 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -345,6 +345,23 @@ extern int sigaltstack __P ((__const struct sigaltstack *__ss, #endif /* signal.h included and use BSD or X/Open Unix. */ +#if defined _SIGNAL_H && defined __USE_UNIX98 +/* Simplified interface for signal management. */ + +/* Add SIG to the calling process' signal mask. */ +extern int sighold __P ((int __sig)); + +/* Remove SIG from the calling process' signal mask. */ +extern int sigrelse __P ((int __sig)); + +/* Set the disposition of SIG to SIG_IGN. */ +extern int sigignore __P ((int __sig)); + +/* Set the disposition of SIG. */ +extern __sighandler_t sigset __P ((int __sig, __sighandler_t __disp)); +#endif + + /* The following functions are used internally in the C library and in other code which need deep insights. */ diff --git a/signal/sigrelse.c b/signal/sigrelse.c new file mode 100644 index 0000000000..44e1001a06 --- /dev/null +++ b/signal/sigrelse.c @@ -0,0 +1,39 @@ +/* Remove SIG from the calling process' signal mask. + Copyright (C) 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <signal.h> + +int +sigrelse (sig) + int sig; +{ + sigset_t set; + + /* Retrieve current signal set. */ + if (sigprocmask (SIG_SETMASK, NULL, &set) < 0) + return -1; + + /* Remove the specified signal. */ + if (sigdelset (&set, sig) < 0) + return -1; + + /* Set the new mask. */ + return sigprocmask (SIG_SETMASK, &set, NULL); +} |