tests: check error message from run_command

In git versions starting at v1.7.5-rc0~29^2 until v1.7.5-rc3~2 (Revert
"run-command: prettify -D_FORTIFY_SOURCE workaround", 2011-04-18)
fixed it, the run_command facility would write a truncated error
message when the command is present but cannot be executed for some
other reason.  For example, if I add a 'hello' command to git:

	$ echo 'echo hello' >git-hello
	$ chmod +x git-hello
	$ PATH=.:$PATH git hello
	hello

and make it non-executable, this is what I normally get:

	$ chmod -x git-hello
	$ git hello
	fatal: cannot exec 'git-hello': Permission denied

But with the problematic versions, we get disturbing output:

	$ PATH=.:$PATH git hello
	fatal: $

Add some tests to make sure it doesn't happen again.

The hello-script used in these tests uses cat instead of echo because
on Windows the bash spawned by git converts LF to CRLF in text written
by echo while the bash running tests does not, causing the test to
fail if "echo" is used.  Thanks to Hannes for noticing.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Improved-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t0061-run-command.sh b/t/t0061-run-command.sh
index 10b26e4d8ef3ea7b6b9b2ae7aeebbbae1ee46703..8d4938f019ca406c0f248d19d046356dff1ac09a 100755 (executable)
--- a/t/t0061-run-command.sh
+++ b/t/t0061-run-command.sh
@@ -7,8 +7,31 @@ test_description='Test run command'
 
 . ./test-lib.sh
 
+cat >hello-script <<-EOF
+       #!$SHELL_PATH
+       cat hello-script
+EOF
+>empty
+
 test_expect_success 'start_command reports ENOENT' '
        test-run-command start-command-ENOENT ./does-not-exist
 '
 
+test_expect_success 'run_command can run a command' '
+       cat hello-script >hello.sh &&
+       chmod +x hello.sh &&
+       test-run-command run-command ./hello.sh >actual 2>err &&
+
+       test_cmp hello-script actual &&
+       test_cmp empty err
+'
+
+test_expect_success POSIXPERM 'run_command reports EACCES' '
+       cat hello-script >hello.sh &&
+       chmod -x hello.sh &&
+       test_must_fail test-run-command run-command ./hello.sh 2>err &&
+
+       grep "fatal: cannot exec.*hello.sh" err
+'
+
 test_done

diff --git a/test-run-command.c b/test-run-command.c
index 0612bfa7cd1909c8c4292b384fd7a56b8baf3c2a..37918e15f5ce06d0079ce09ae1a7be7b14533c48 100644 (file)
--- a/test-run-command.c
+++ b/test-run-command.c
@@ -29,6 +29,8 @@ int main(int argc, char **argv)
                fprintf(stderr, "FAIL %s\n", argv[1]);
                return 1;
        }
+       if (!strcmp(argv[1], "run-command"))
+               exit(run_command(&proc));
 
        fprintf(stderr, "check usage\n");
        return 1;