diff options
Diffstat (limited to 'src/xspawn.c')
| -rw-r--r-- | src/xspawn.c | 37 |
1 files changed, 29 insertions, 8 deletions
diff --git a/src/xspawn.c b/src/xspawn.c index 0b0cea4..33e5a4a 100644 --- a/src/xspawn.c +++ b/src/xspawn.c @@ -5,9 +5,11 @@ #include "xspawn.h" #include "alloc.h" #include "bfstd.h" +#include "diag.h" #include "list.h" #include <errno.h> #include <fcntl.h> +#include <signal.h> #include <stdlib.h> #include <string.h> #include <sys/resource.h> @@ -590,30 +592,49 @@ static pid_t bfs_fork_spawn(struct bfs_resolver *res, const struct bfs_spawn *ct return -1; } + // Block signals before fork() so handlers don't run in the child + sigset_t new_mask; + if (sigfillset(&new_mask) != 0) { + goto fail; + } + sigset_t old_mask; + errno = pthread_sigmask(SIG_BLOCK, &new_mask, &old_mask); + if (errno != 0) { + goto fail; + } + pid_t pid = fork(); - if (pid < 0) { - close_quietly(pipefd[1]); - close_quietly(pipefd[0]); - return -1; - } else if (pid == 0) { + if (pid == 0) { // Child bfs_spawn_exec(res, ctx, argv, envp, pipefd); } - // Parent + // Restore the original signal mask + int ret = pthread_sigmask(SIG_SETMASK, &old_mask, NULL); + bfs_everify(ret == 0, "pthread_sigmask()"); + + if (pid < 0) { + // fork() failed + goto fail; + } + xclose(pipefd[1]); int error; ssize_t nbytes = xread(pipefd[0], &error, sizeof(error)); xclose(pipefd[0]); if (nbytes == sizeof(error)) { - int wstatus; - xwaitpid(pid, &wstatus, 0); + xwaitpid(pid, NULL, 0); errno = error; return -1; } return pid; + +fail: + close_quietly(pipefd[1]); + close_quietly(pipefd[0]); + return -1; } /** Call the right bfs_spawn() implementation. */ |