1251877Speter#include <unistd.h> 2251877Speter#include <stdlib.h> 3251877Speter#include <signal.h> 4251877Speter#include <sys/wait.h> 5251877Speter#include <spawn.h> 6251877Speter#include <errno.h> 7251877Speter#include "pthread_impl.h" 8251877Speter#include "libc.h" 9251877Speter 10251877Speterextern char **__environ; 11251877Speter 12251877Speterint system(const char *cmd) 13251877Speter{ 14251877Speter pid_t pid; 15251877Speter sigset_t old, reset; 16251877Speter struct sigaction sa = { .sa_handler = SIG_IGN }, oldint, oldquit; 17251877Speter int status = 0x7f00, ret; 18251877Speter posix_spawnattr_t attr; 19251877Speter 20251877Speter pthread_testcancel(); 21251877Speter 22251877Speter if (!cmd) return 1; 23251877Speter 24251877Speter sigaction(SIGINT, &sa, &oldint); 25251877Speter sigaction(SIGQUIT, &sa, &oldquit); 26251877Speter sigaddset(&sa.sa_mask, SIGCHLD); 27251877Speter sigprocmask(SIG_BLOCK, &sa.sa_mask, &old); 28251877Speter 29251877Speter sigemptyset(&reset); 30251877Speter if (oldint.sa_handler != SIG_IGN) sigaddset(&reset, SIGINT); 31251877Speter if (oldquit.sa_handler != SIG_IGN) sigaddset(&reset, SIGQUIT); 32251877Speter posix_spawnattr_init(&attr); 33251877Speter posix_spawnattr_setsigmask(&attr, &old); 34251877Speter posix_spawnattr_setsigdefault(&attr, &reset); 35251877Speter posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETSIGDEF|POSIX_SPAWN_SETSIGMASK); 36251877Speter ret = posix_spawn(&pid, "/bin/sh", 0, &attr, 37251877Speter (char *[]){"sh", "-c", (char *)cmd, 0}, __environ); 38251877Speter posix_spawnattr_destroy(&attr); 39251877Speter 40251877Speter if (!ret) while (waitpid(pid, &status, 0)<0 && errno == EINTR); 41251877Speter sigaction(SIGINT, &oldint, NULL); 42251877Speter sigaction(SIGQUIT, &oldquit, NULL); 43251877Speter sigprocmask(SIG_SETMASK, &old, NULL); 44251877Speter 45251877Speter if (ret) errno = ret; 46251877Speter return status; 47251877Speter} 48251877Speter