diff options
| -rw-r--r-- | c/cloexec/cloexec.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/c/cloexec/cloexec.c b/c/cloexec/cloexec.c index ba899ee..50b7639 100644 --- a/c/cloexec/cloexec.c +++ b/c/cloexec/cloexec.c @@ -1,8 +1,12 @@ #define _GNU_SOURCE +#include <sys/wait.h> + #include <assert.h> #include <err.h> -#include <paths.h> +#include <errno.h> #include <fcntl.h> +#include <paths.h> +#include <stdio.h> #include <unistd.h> int @@ -22,5 +26,20 @@ main(void) assert((fcntl(nfd, F_GETFD) & FD_CLOEXEC) != 0); close(nfd); - close(fd); + + switch (fork()) { + case -1: + err(1, "fork"); + case 0: + puts("If the FD for /dev/null is closed, this should list 4 items"); + fflush(stdout); + execlp("ls", "ls", "/proc/self/fd", NULL); + err(1, "exec: true"); + default: + if (wait(NULL) == -1) + err(1, "wait"); + } + + /* Not EBADF */ + assert(close(fd) == 0); } |