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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2009-09-06 21:48:16 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2009-09-06 21:48:16 +0200 |
| commit | ee4233a2f5f47409da9aab5a59c0753e83ef0ab8 (patch) | |
| tree | 66e9b2f0f8771124997c7a9b7cfeb6b4b833342a /libc | |
| parent | 656167d89112171b2b7672676dc413c676a186f5 (diff) | |
| download | uClibc-alpine-ee4233a2f5f47409da9aab5a59c0753e83ef0ab8.tar.bz2 uClibc-alpine-ee4233a2f5f47409da9aab5a59c0753e83ef0ab8.tar.xz | |
wordexp.c: fix a bug where we might close stdout
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libc')
| -rw-r--r-- | libc/misc/wordexp/wordexp.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/libc/misc/wordexp/wordexp.c b/libc/misc/wordexp/wordexp.c index 8167ed685..4a2b50b4e 100644 --- a/libc/misc/wordexp/wordexp.c +++ b/libc/misc/wordexp/wordexp.c @@ -787,6 +787,7 @@ parse_arith(char **word, size_t * word_length, size_t * max_length, static void attribute_noreturn exec_comm_child(char *comm, int *fildes, int showerr, int noexec) { + int fd; const char *args[4] = { _PATH_BSHELL, "-c", comm, NULL }; /* Execute the command, or just check syntax? */ @@ -794,13 +795,14 @@ exec_comm_child(char *comm, int *fildes, int showerr, int noexec) args[1] = "-nc"; /* Redirect output. */ - dup2(fildes[1], 1); - close(fildes[1]); + fd = fildes[1]; + if (fd != 1) { + dup2(fd, 1); + close(fd); + } /* Redirect stderr to /dev/null if we have to. */ if (showerr == 0) { - int fd; - close(2); fd = open(_PATH_DEVNULL, O_WRONLY); if (fd >= 0 && fd != 2) { @@ -812,7 +814,8 @@ exec_comm_child(char *comm, int *fildes, int showerr, int noexec) /* Make sure the subshell doesn't field-split on our behalf. */ unsetenv("IFS"); - close(fildes[0]); + if (fildes[0] != 1) + close(fildes[0]); execve(_PATH_BSHELL, (char *const *) args, __environ); /* Bad. What now? */ |