glibc/glibc-rh2065588-4.patch

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commit f09542c584b121da0322fde4b55306d512b85d93
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Mon Mar 23 15:23:20 2020 -0300
posix: Fix system error return value [BZ #25715]
It fixes 5fb7fc9635 when posix_spawn fails.
Checked on x86_64-linux-gnu and i686-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
diff --git a/stdlib/tst-system.c b/stdlib/tst-system.c
index d14839f3ec3a7bad..b61bd347df7ec46a 100644
--- a/stdlib/tst-system.c
+++ b/stdlib/tst-system.c
@@ -17,14 +17,128 @@
<http://www.gnu.org/licenses/>. */
#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <signal.h>
+#include <paths.h>
+#include <support/capture_subprocess.h>
+#include <support/check.h>
+#include <support/temp_file.h>
+#include <support/support.h>
+
+static char *tmpdir;
+static long int namemax;
+
+static void
+do_prepare (int argc, char *argv[])
+{
+ tmpdir = support_create_temp_directory ("tst-system-");
+ /* Include the last '/0'. */
+ namemax = pathconf (tmpdir, _PC_NAME_MAX) + 1;
+ TEST_VERIFY_EXIT (namemax != -1);
+}
+#define PREPARE do_prepare
+
+struct args
+{
+ const char *command;
+ int exit_status;
+ int term_sig;
+ const char *path;
+};
+
+static void
+call_system (void *closure)
+{
+ struct args *args = (struct args *) closure;
+ int ret;
+
+ if (args->path != NULL)
+ TEST_COMPARE (setenv ("PATH", args->path, 1), 0);
+ ret = system (args->command);
+ if (args->term_sig == 0)
+ {
+ /* Expect regular termination. */
+ TEST_VERIFY (WIFEXITED (ret) != 0);
+ TEST_COMPARE (WEXITSTATUS (ret), args->exit_status);
+ }
+ else
+ {
+ /* status_or_signal < 0. Expect termination by signal. */
+ TEST_VERIFY (WIFSIGNALED (ret) != 0);
+ TEST_COMPARE (WTERMSIG (ret), args->term_sig);
+ }
+}
static int
do_test (void)
{
- return system (":");
-}
+ TEST_VERIFY (system (NULL) != 0);
+ {
+ char cmd[namemax];
+ memset (cmd, 'a', sizeof(cmd));
+ cmd[sizeof(cmd) - 1] = '\0';
+
+ struct support_capture_subprocess result;
+ result = support_capture_subprocess (call_system,
+ &(struct args) {
+ cmd, 127, 0, tmpdir
+ });
+ support_capture_subprocess_check (&result, "system", 0, sc_allow_stderr);
+
+ char *returnerr = xasprintf ("%s: 1: %s: not found\n",
+ basename(_PATH_BSHELL), cmd);
+ TEST_COMPARE_STRING (result.err.buffer, returnerr);
+ free (returnerr);
+ }
+
+ {
+ char cmd[namemax + 1];
+ memset (cmd, 'a', sizeof(cmd));
+ cmd[sizeof(cmd) - 1] = '\0';
+
+ struct support_capture_subprocess result;
+ result = support_capture_subprocess (call_system,
+ &(struct args) {
+ cmd, 127, 0, tmpdir
+ });
+ support_capture_subprocess_check (&result, "system", 0, sc_allow_stderr);
+
+ char *returnerr = xasprintf ("%s: 1: %s: File name too long\n",
+ basename(_PATH_BSHELL), cmd);
+ TEST_COMPARE_STRING (result.err.buffer, returnerr);
+ free (returnerr);
+ }
+
+ {
+ struct support_capture_subprocess result;
+ result = support_capture_subprocess (call_system,
+ &(struct args) {
+ "kill -USR1 $$", 0, SIGUSR1
+ });
+ support_capture_subprocess_check (&result, "system", 0, sc_allow_none);
+ }
+
+ {
+ struct support_capture_subprocess result;
+ result = support_capture_subprocess (call_system,
+ &(struct args) { "echo ...", 0 });
+ support_capture_subprocess_check (&result, "system", 0, sc_allow_stdout);
+ TEST_COMPARE_STRING (result.out.buffer, "...\n");
+ }
+
+ {
+ struct support_capture_subprocess result;
+ result = support_capture_subprocess (call_system,
+ &(struct args) { "exit 1", 1 });
+ support_capture_subprocess_check (&result, "system", 0, sc_allow_none);
+ }
+
+ TEST_COMPARE (system (":"), 0);
+
+ return 0;
+}
-#define TEST_FUNCTION do_test ()
-#include "../test-skeleton.c"
+#include <support/test-driver.c>
diff --git a/sysdeps/posix/system.c b/sysdeps/posix/system.c
index 8a51a6b9919ec39b..7db09a05c3fbca43 100644
--- a/sysdeps/posix/system.c
+++ b/sysdeps/posix/system.c
@@ -97,7 +97,8 @@ cancel_handler (void *arg)
static int
do_system (const char *line)
{
- int status;
+ int status = -1;
+ int ret;
pid_t pid;
struct sigaction sa;
#ifndef _LIBC_REENTRANT
@@ -140,14 +141,14 @@ do_system (const char *line)
__posix_spawnattr_setflags (&spawn_attr,
POSIX_SPAWN_SETSIGDEF | POSIX_SPAWN_SETSIGMASK);
- status = __posix_spawn (&pid, SHELL_PATH, 0, &spawn_attr,
- (char *const[]){ (char*) SHELL_NAME,
- (char*) "-c",
- (char *) line, NULL },
- __environ);
+ ret = __posix_spawn (&pid, SHELL_PATH, 0, &spawn_attr,
+ (char *const[]){ (char *) SHELL_NAME,
+ (char *) "-c",
+ (char *) line, NULL },
+ __environ);
__posix_spawnattr_destroy (&spawn_attr);
- if (status == 0)
+ if (ret == 0)
{
/* Cancellation results in cleanup handlers running as exceptions in
the block where they were installed, so it is safe to reference
@@ -182,6 +183,9 @@ do_system (const char *line)
}
DO_UNLOCK ();
+ if (ret != 0)
+ __set_errno (ret);
+
return status;
}