diff options
Diffstat (limited to 'shared/systemd/src/basic/signal-util.c')
| -rw-r--r-- | shared/systemd/src/basic/signal-util.c | 299 |
1 files changed, 0 insertions, 299 deletions
diff --git a/shared/systemd/src/basic/signal-util.c b/shared/systemd/src/basic/signal-util.c deleted file mode 100644 index 0c6f5818..00000000 --- a/shared/systemd/src/basic/signal-util.c +++ /dev/null @@ -1,299 +0,0 @@ -/* SPDX-License-Identifier: LGPL-2.1-or-later */ - -#include "nm-sd-adapt-shared.h" - -#include <errno.h> -#include <stdarg.h> - -#include "macro.h" -#include "parse-util.h" -#include "signal-util.h" -#include "stdio-util.h" -#include "string-table.h" -#include "string-util.h" - -#if 0 /* NM_IGNORED */ -int reset_all_signal_handlers(void) { - static const struct sigaction sa = { - .sa_handler = SIG_DFL, - .sa_flags = SA_RESTART, - }; - int sig, r = 0; - - for (sig = 1; sig < _NSIG; sig++) { - - /* These two cannot be caught... */ - if (IN_SET(sig, SIGKILL, SIGSTOP)) - continue; - - /* On Linux the first two RT signals are reserved by - * glibc, and sigaction() will return EINVAL for them. */ - if (sigaction(sig, &sa, NULL) < 0) - if (errno != EINVAL && r >= 0) - r = -errno; - } - - return r; -} - -int reset_signal_mask(void) { - sigset_t ss; - - if (sigemptyset(&ss) < 0) - return -errno; - - if (sigprocmask(SIG_SETMASK, &ss, NULL) < 0) - return -errno; - - return 0; -} - -static int sigaction_many_ap(const struct sigaction *sa, int sig, va_list ap) { - int r = 0; - - /* negative signal ends the list. 0 signal is skipped. */ - for (; sig >= 0; sig = va_arg(ap, int)) { - - if (sig == 0) - continue; - - if (sigaction(sig, sa, NULL) < 0) { - if (r >= 0) - r = -errno; - } - } - - return r; -} - -int sigaction_many(const struct sigaction *sa, ...) { - va_list ap; - int r; - - va_start(ap, sa); - r = sigaction_many_ap(sa, 0, ap); - va_end(ap); - - return r; -} - -int ignore_signals(int sig, ...) { - - static const struct sigaction sa = { - .sa_handler = SIG_IGN, - .sa_flags = SA_RESTART, - }; - - va_list ap; - int r; - - va_start(ap, sig); - r = sigaction_many_ap(&sa, sig, ap); - va_end(ap); - - return r; -} - -int default_signals(int sig, ...) { - - static const struct sigaction sa = { - .sa_handler = SIG_DFL, - .sa_flags = SA_RESTART, - }; - - va_list ap; - int r; - - va_start(ap, sig); - r = sigaction_many_ap(&sa, sig, ap); - va_end(ap); - - return r; -} - -static int sigset_add_many_ap(sigset_t *ss, va_list ap) { - int sig, r = 0; - - assert(ss); - - while ((sig = va_arg(ap, int)) >= 0) { - - if (sig == 0) - continue; - - if (sigaddset(ss, sig) < 0) { - if (r >= 0) - r = -errno; - } - } - - return r; -} - -int sigset_add_many(sigset_t *ss, ...) { - va_list ap; - int r; - - va_start(ap, ss); - r = sigset_add_many_ap(ss, ap); - va_end(ap); - - return r; -} - -int sigprocmask_many(int how, sigset_t *old, ...) { - va_list ap; - sigset_t ss; - int r; - - if (sigemptyset(&ss) < 0) - return -errno; - - va_start(ap, old); - r = sigset_add_many_ap(&ss, ap); - va_end(ap); - - if (r < 0) - return r; - - if (sigprocmask(how, &ss, old) < 0) - return -errno; - - return 0; -} - -static const char *const __signal_table[] = { - [SIGHUP] = "HUP", - [SIGINT] = "INT", - [SIGQUIT] = "QUIT", - [SIGILL] = "ILL", - [SIGTRAP] = "TRAP", - [SIGABRT] = "ABRT", - [SIGBUS] = "BUS", - [SIGFPE] = "FPE", - [SIGKILL] = "KILL", - [SIGUSR1] = "USR1", - [SIGSEGV] = "SEGV", - [SIGUSR2] = "USR2", - [SIGPIPE] = "PIPE", - [SIGALRM] = "ALRM", - [SIGTERM] = "TERM", -#ifdef SIGSTKFLT - [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */ -#endif - [SIGCHLD] = "CHLD", - [SIGCONT] = "CONT", - [SIGSTOP] = "STOP", - [SIGTSTP] = "TSTP", - [SIGTTIN] = "TTIN", - [SIGTTOU] = "TTOU", - [SIGURG] = "URG", - [SIGXCPU] = "XCPU", - [SIGXFSZ] = "XFSZ", - [SIGVTALRM] = "VTALRM", - [SIGPROF] = "PROF", - [SIGWINCH] = "WINCH", - [SIGIO] = "IO", - [SIGPWR] = "PWR", - [SIGSYS] = "SYS" -}; - -DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int); - -const char *signal_to_string(int signo) { - static thread_local char buf[STRLEN("RTMIN+") + DECIMAL_STR_MAX(int) + 1]; - const char *name; - - name = __signal_to_string(signo); - if (name) - return name; - - if (signo >= SIGRTMIN && signo <= SIGRTMAX) - xsprintf(buf, "RTMIN+%d", signo - SIGRTMIN); - else - xsprintf(buf, "%d", signo); - - return buf; -} - -int signal_from_string(const char *s) { - const char *p; - int signo, r; - - /* Check that the input is a signal number. */ - if (safe_atoi(s, &signo) >= 0) { - if (SIGNAL_VALID(signo)) - return signo; - else - return -ERANGE; - } - - /* Drop "SIG" prefix. */ - if (startswith(s, "SIG")) - s += 3; - - /* Check that the input is a signal name. */ - signo = __signal_from_string(s); - if (signo > 0) - return signo; - - /* Check that the input is RTMIN or - * RTMIN+n (0 <= n <= SIGRTMAX-SIGRTMIN). */ - p = startswith(s, "RTMIN"); - if (p) { - if (*p == '\0') - return SIGRTMIN; - if (*p != '+') - return -EINVAL; - - r = safe_atoi(p, &signo); - if (r < 0) - return r; - - if (signo < 0 || signo > SIGRTMAX - SIGRTMIN) - return -ERANGE; - - return signo + SIGRTMIN; - } - - /* Check that the input is RTMAX or - * RTMAX-n (0 <= n <= SIGRTMAX-SIGRTMIN). */ - p = startswith(s, "RTMAX"); - if (p) { - if (*p == '\0') - return SIGRTMAX; - if (*p != '-') - return -EINVAL; - - r = safe_atoi(p, &signo); - if (r < 0) - return r; - - if (signo > 0 || signo < SIGRTMIN - SIGRTMAX) - return -ERANGE; - - return signo + SIGRTMAX; - } - - return -EINVAL; -} - -void nop_signal_handler(int sig) { - /* nothing here */ -} -#endif /* NM_IGNORED */ - -int signal_is_blocked(int sig) { - sigset_t ss; - int r; - - r = pthread_sigmask(SIG_SETMASK, NULL, &ss); - if (r != 0) - return -r; - - r = sigismember(&ss, sig); - if (r < 0) - return -errno; - - return r; -} |