We will need computing the return value in a later patch without the
wait.
Signed-off-by: Stefan Beller <[email protected]>
---
run-command.c | 54 ++++++++++++++++++++++++++++++++----------------------
1 file changed, 32 insertions(+), 22 deletions(-)
diff --git a/run-command.c b/run-command.c
index 28e1d55..674e348 100644
--- a/run-command.c
+++ b/run-command.c
@@ -232,6 +232,35 @@ static inline void set_cloexec(int fd)
fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
}
+static int determine_return_value(int wait_status,
+ int *result,
+ int *error_code,
+ const char *argv0)
+{
+ if (WIFSIGNALED(wait_status)) {
+ *result = WTERMSIG(wait_status);
+ if (*result != SIGINT && *result != SIGQUIT)
+ error("%s died of signal %d", argv0, *result);
+ /*
+ * This return value is chosen so that code & 0xff
+ * mimics the exit code that a POSIX shell would report for
+ * a program that died from this signal.
+ */
+ *result += 128;
+ } else if (WIFEXITED(wait_status)) {
+ *result = WEXITSTATUS(wait_status);
+ /*
+ * Convert special exit code when execvp failed.
+ */
+ if (*result == 127) {
+ *result = -1;
+ *error_code = ENOENT;
+ }
+ } else
+ return -1;
+ return 0;
+}
+
static int wait_or_whine(pid_t pid, const char *argv0)
{
int status, code = -1;
@@ -244,29 +273,10 @@ static int wait_or_whine(pid_t pid, const char *argv0)
if (waiting < 0) {
failed_errno = errno;
error("waitpid for %s failed: %s", argv0, strerror(errno));
- } else if (waiting != pid) {
- error("waitpid is confused (%s)", argv0);
- } else if (WIFSIGNALED(status)) {
- code = WTERMSIG(status);
- if (code != SIGINT && code != SIGQUIT)
- error("%s died of signal %d", argv0, code);
- /*
- * This return value is chosen so that code & 0xff
- * mimics the exit code that a POSIX shell would report for
- * a program that died from this signal.
- */
- code += 128;
- } else if (WIFEXITED(status)) {
- code = WEXITSTATUS(status);
- /*
- * Convert special exit code when execvp failed.
- */
- if (code == 127) {
- code = -1;
- failed_errno = ENOENT;
- }
} else {
- error("waitpid is confused (%s)", argv0);
+ if (waiting != pid
+ || (determine_return_value(status, &code, &failed_errno,
argv0) < 0))
+ error("waitpid is confused (%s)", argv0);
}
clear_child_for_cleanup(pid);
--
2.5.0.275.ge015d2a
--
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