From 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 12 Feb 2011 00:22:29 -0500 Subject: initial check-in, version 0.5.0 --- src/process/system.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 src/process/system.c (limited to 'src/process/system.c') diff --git a/src/process/system.c b/src/process/system.c new file mode 100644 index 00000000..0f1c07b5 --- /dev/null +++ b/src/process/system.c @@ -0,0 +1,45 @@ +#include +#include +#include +#include +#include + +int system(const char *cmd) +{ + pid_t pid; + sigset_t old, new; + struct sigaction sa, oldint, oldquit; + int status; + + if (!cmd) return 1; + + sa.sa_handler = SIG_IGN; + sigemptyset(&sa.sa_mask); + sa.sa_flags = 0; + + sigaction(SIGINT, &sa, &oldint); + sigaction(SIGQUIT, &sa, &oldquit); + sigaddset(&sa.sa_mask, SIGCHLD); + sigprocmask(SIG_BLOCK, &new, &old); + + pid = fork(); + if (pid <= 0) { + sigaction(SIGINT, &oldint, NULL); + sigaction(SIGQUIT, &oldquit, NULL); + sigprocmask(SIG_SETMASK, &old, NULL); + if (pid == 0) { + execl("/bin/sh", "sh", "-c", cmd, (char *)0); + _exit(127); + } + return -1; + } + while (waitpid(pid, &status, 0) == -1) + if (errno != EINTR) { + status = -1; + break; + } + sigaction(SIGINT, &oldint, NULL); + sigaction(SIGQUIT, &oldquit, NULL); + sigprocmask(SIG_SETMASK, &old, NULL); + return status; +} -- cgit v1.2.1