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Date: Mon, 5 Jan 2015 11:19:46 +0000
From: David Drysdale <drysdale@...gle.com>
To: linux-kernel@...r.kernel.org,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Andreas Schwab <schwab@...ux-m68k.org>
Cc: Shuah Khan <shuahkh@....samsung.com>,
Andrew Morton <akpm@...ux-foundation.org>,
linux-m68k@...ts.linux-m68k.org, linux-api@...r.kernel.org,
David Drysdale <drysdale@...gle.com>
Subject: [PATCH] selftests/exec: allow shell return code of 126
When the shell fails to invoke a script because its path name
is too long (ENAMETOOLONG), most shells return 127 to indicate
command not found. However, some systems report 126 (which POSIX
suggests should indicate a non-executable file) for this case,
so allow that too.
Reported-by: Geert Uytterhoeven <geert@...ux-m68k.org>
Signed-off-by: David Drysdale <drysdale@...gle.com>
---
tools/testing/selftests/exec/execveat.c | 28 ++++++++++++++++++++++------
1 file changed, 22 insertions(+), 6 deletions(-)
diff --git a/tools/testing/selftests/exec/execveat.c b/tools/testing/selftests/exec/execveat.c
index d273624c93a6..0d940c6e26bd 100644
--- a/tools/testing/selftests/exec/execveat.c
+++ b/tools/testing/selftests/exec/execveat.c
@@ -62,7 +62,7 @@ static int _check_execveat_fail(int fd, const char *path, int flags,
}
static int check_execveat_invoked_rc(int fd, const char *path, int flags,
- int expected_rc)
+ int expected_rc, int expected_rc2)
{
int status;
int rc;
@@ -99,9 +99,19 @@ static int check_execveat_invoked_rc(int fd, const char *path, int flags,
return 1;
}
if (WEXITSTATUS(status) != expected_rc) {
- printf("[FAIL] (child %d exited with %d not %d)\n",
- child, WEXITSTATUS(status), expected_rc);
- return 1;
+ if (expected_rc != expected_rc2) {
+ if (WEXITSTATUS(status) != expected_rc2) {
+ printf("[FAIL] (child %d exited with %d;"
+ " not %d nor %d)\n",
+ child, WEXITSTATUS(status),
+ expected_rc, expected_rc2);
+ return 1;
+ }
+ } else {
+ printf("[FAIL] (child %d exited with %d not %d)\n",
+ child, WEXITSTATUS(status), expected_rc);
+ return 1;
+ }
}
printf("[OK]\n");
return 0;
@@ -109,7 +119,7 @@ static int check_execveat_invoked_rc(int fd, const char *path, int flags,
static int check_execveat(int fd, const char *path, int flags)
{
- return check_execveat_invoked_rc(fd, path, flags, 99);
+ return check_execveat_invoked_rc(fd, path, flags, 99, 99);
}
static char *concat(const char *left, const char *right)
@@ -192,9 +202,15 @@ static int check_execveat_pathmax(int dot_dfd, const char *src, int is_script)
* Execute as a long pathname relative to ".". If this is a script,
* the interpreter will launch but fail to open the script because its
* name ("/dev/fd/5/xxx....") is bigger than PATH_MAX.
+ *
+ * The failure code is usually 127 (POSIX: "If a command is not found,
+ * the exit status shall be 127."), but some systems give 126 (POSIX:
+ * "If the command name is found, but it is not an executable utility,
+ * the exit status shall be 126."), so allow either.
*/
if (is_script)
- fail += check_execveat_invoked_rc(dot_dfd, longpath, 0, 127);
+ fail += check_execveat_invoked_rc(dot_dfd, longpath, 0,
+ 127, 126);
else
fail += check_execveat(dot_dfd, longpath, 0);
--
2.2.0.rc0.207.ga3a616c
--
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