diff options
Diffstat (limited to 'lib/libc/compat-43/sigcompat.c')
| -rw-r--r-- | lib/libc/compat-43/sigcompat.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/lib/libc/compat-43/sigcompat.c b/lib/libc/compat-43/sigcompat.c new file mode 100644 index 000000000000..77cfc279a3b3 --- /dev/null +++ b/lib/libc/compat-43/sigcompat.c @@ -0,0 +1,181 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "namespace.h" +#include <sys/param.h> +#include <errno.h> +#include <signal.h> +#include <string.h> +#include "un-namespace.h" +#include "libc_private.h" + +int +sigvec(int signo, struct sigvec *sv, struct sigvec *osv) +{ + struct sigaction sa, osa; + struct sigaction *sap, *osap; + int ret; + + if (sv != NULL) { + sa.sa_handler = sv->sv_handler; + sa.sa_flags = sv->sv_flags ^ SV_INTERRUPT; + sigemptyset(&sa.sa_mask); + sa.sa_mask.__bits[0] = sv->sv_mask; + sap = &sa; + } else + sap = NULL; + osap = osv != NULL ? &osa : NULL; + ret = __libc_sigaction(signo, sap, osap); + if (ret == 0 && osv != NULL) { + osv->sv_handler = osa.sa_handler; + osv->sv_flags = osa.sa_flags ^ SV_INTERRUPT; + osv->sv_mask = osa.sa_mask.__bits[0]; + } + return (ret); +} + +int +sigsetmask(int mask) +{ + sigset_t set, oset; + int n; + + sigemptyset(&set); + set.__bits[0] = mask; + n = __libc_sigprocmask(SIG_SETMASK, &set, &oset); + if (n) + return (n); + return (oset.__bits[0]); +} + +int +sigblock(int mask) +{ + sigset_t set, oset; + int n; + + sigemptyset(&set); + set.__bits[0] = mask; + n = __libc_sigprocmask(SIG_BLOCK, &set, &oset); + if (n) + return (n); + return (oset.__bits[0]); +} + +int +sigpause(int mask) +{ + sigset_t set; + + sigemptyset(&set); + set.__bits[0] = mask; + return (__libc_sigsuspend(&set)); +} + +int +xsi_sigpause(int sig) +{ + sigset_t set; + + if (__libc_sigprocmask(SIG_BLOCK, NULL, &set) == -1) + return (-1); + if (sigdelset(&set, sig) == -1) + return (-1); + return (__libc_sigsuspend(&set)); +} + +int +sighold(int sig) +{ + sigset_t set; + + sigemptyset(&set); + if (sigaddset(&set, sig) == -1) + return (-1); + return (__libc_sigprocmask(SIG_BLOCK, &set, NULL)); +} + +int +sigignore(int sig) +{ + struct sigaction sa; + + bzero(&sa, sizeof(sa)); + sa.sa_handler = SIG_IGN; + return (__libc_sigaction(sig, &sa, NULL)); +} + +int +sigrelse(int sig) +{ + sigset_t set; + + sigemptyset(&set); + if (sigaddset(&set, sig) == -1) + return (-1); + return (__libc_sigprocmask(SIG_UNBLOCK, &set, NULL)); +} + +void +(*sigset(int sig, void (*disp)(int)))(int) +{ + sigset_t set, pset; + struct sigaction sa, psa; + + sigemptyset(&set); + if (sigaddset(&set, sig) == -1) + return (SIG_ERR); + if (__libc_sigprocmask(SIG_BLOCK, NULL, &pset) == -1) + return (SIG_ERR); + if ((__sighandler_t *)disp == SIG_HOLD) { + if (__libc_sigprocmask(SIG_BLOCK, &set, &pset) == -1) + return (SIG_ERR); + if (sigismember(&pset, sig)) + return (SIG_HOLD); + else { + if (__libc_sigaction(sig, NULL, &psa) == -1) + return (SIG_ERR); + return (psa.sa_handler); + } + } else { + if (__libc_sigprocmask(SIG_UNBLOCK, &set, &pset) == -1) + return (SIG_ERR); + } + + bzero(&sa, sizeof(sa)); + sa.sa_handler = disp; + if (__libc_sigaction(sig, &sa, &psa) == -1) + return (SIG_ERR); + if (sigismember(&pset, sig)) + return (SIG_HOLD); + else + return (psa.sa_handler); +} |