[388] | 1 | #include <unistd.h>
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| 2 | #include <stdlib.h>
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| 3 | #include <signal.h>
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| 4 | #include <sys/wait.h>
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| 5 | #include <spawn.h>
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| 6 | #include <errno.h>
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| 7 | #include "pthread_impl.h"
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| 8 | #include "libc.h"
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| 9 |
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| 10 | extern char **__environ;
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| 11 |
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| 12 | int system(const char *cmd)
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| 13 | {
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| 14 | pid_t pid;
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| 15 | sigset_t old, reset;
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| 16 | struct sigaction sa = { .sa_handler = SIG_IGN }, oldint, oldquit;
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| 17 | int status = 0x7f00, ret;
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| 18 | posix_spawnattr_t attr;
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| 19 |
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| 20 | pthread_testcancel();
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| 21 |
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| 22 | if (!cmd) return 1;
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| 23 |
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| 24 | sigaction(SIGINT, &sa, &oldint);
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| 25 | sigaction(SIGQUIT, &sa, &oldquit);
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| 26 | sigaddset(&sa.sa_mask, SIGCHLD);
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| 27 | sigprocmask(SIG_BLOCK, &sa.sa_mask, &old);
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| 28 |
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| 29 | sigemptyset(&reset);
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| 30 | if (oldint.sa_handler != SIG_IGN) sigaddset(&reset, SIGINT);
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| 31 | if (oldquit.sa_handler != SIG_IGN) sigaddset(&reset, SIGQUIT);
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| 32 | posix_spawnattr_init(&attr);
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| 33 | posix_spawnattr_setsigmask(&attr, &old);
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| 34 | posix_spawnattr_setsigdefault(&attr, &reset);
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| 35 | posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETSIGDEF|POSIX_SPAWN_SETSIGMASK);
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| 36 | ret = posix_spawn(&pid, "/bin/sh", 0, &attr,
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| 37 | (char *[]){"sh", "-c", (char *)cmd, 0}, __environ);
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| 38 | posix_spawnattr_destroy(&attr);
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| 39 |
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| 40 | if (!ret) while (waitpid(pid, &status, 0)<0 && errno == EINTR);
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| 41 | sigaction(SIGINT, &oldint, NULL);
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| 42 | sigaction(SIGQUIT, &oldquit, NULL);
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| 43 | sigprocmask(SIG_SETMASK, &old, NULL);
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| 44 |
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| 45 | if (ret) errno = ret;
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| 46 | return status;
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| 47 | }
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