diff options
| -rw-r--r-- | src/shared/util.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/src/shared/util.c b/src/shared/util.c index ee95a4b6f7..364f61885b 100644 --- a/src/shared/util.c +++ b/src/shared/util.c @@ -2468,9 +2468,9 @@ int make_stdio(int fd) { assert(fd >= 0); - r = dup3(fd, STDIN_FILENO, 0); - s = dup3(fd, STDOUT_FILENO, 0); - t = dup3(fd, STDERR_FILENO, 0); + r = dup2(fd, STDIN_FILENO); + s = dup2(fd, STDOUT_FILENO); + t = dup2(fd, STDERR_FILENO); if (fd >= 3) safe_close(fd); @@ -2478,7 +2478,11 @@ int make_stdio(int fd) { if (r < 0 || s < 0 || t < 0) return -errno; - /* We rely here that the new fd has O_CLOEXEC not set */ + /* Explicitly unset O_CLOEXEC, since if fd was < 3, then + * dup2() was a NOP and the bit hence possibly set. */ + fd_cloexec(STDIN_FILENO, false); + fd_cloexec(STDOUT_FILENO, false); + fd_cloexec(STDERR_FILENO, false); return 0; } |