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usage.c + gc: add and use a die_message_errno()

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Change the "error: " output when we exit with 128 due to gc.log errors
to use a "fatal: " prefix instead. To do this add a
die_message_errno() a sibling function to the die_errno() added in a
preceding commit.

Before this we'd expect report_last_gc_error() to return -1 from
error_errno() in this case. It already treated a status of 0 and 1
specially. Let's just document that anything that's not 0 or 1 should
be returned.

We could also retain the "ret < 0" behavior here without hardcoding
128 by returning -128, and having the caller do a "return -ret", but I
think this makes more sense, and preserves the path from
die_message*()'s return value to the "return" without hardcoding
"128".

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason 2021-12-07 19:26:33 +01:00 committed by Junio C Hamano
parent 0faf84d97d
commit 24f6e6d626
3 changed files with 20 additions and 6 deletions
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13
builtin/gc.c
View File

@ -470,7 +470,8 @@ static const char *lock_repo_for_gc(int force, pid_t* ret_pid)
/*
* Returns 0 if there was no previous error and gc can proceed, 1 if
* gc should not proceed due to an error in the last run. Prints a
* message and returns -1 if an error occurred while reading gc.log
* message and returns with a non-[01] status code if an error occurred
* while reading gc.log
*/
static int report_last_gc_error(void)
{
@ -484,7 +485,7 @@ static int report_last_gc_error(void)
if (errno == ENOENT)
goto done;
ret = error_errno(_("cannot stat '%s'"), gc_log_path);
ret = die_message_errno(_("cannot stat '%s'"), gc_log_path);
goto done;
}
@ -493,7 +494,7 @@ static int report_last_gc_error(void)
len = strbuf_read_file(&sb, gc_log_path, 0);
if (len < 0)
ret = error_errno(_("cannot read '%s'"), gc_log_path);
ret = die_message_errno(_("cannot read '%s'"), gc_log_path);
else if (len > 0) {
/*
* A previous gc failed. Report the error, and don't
@ -612,12 +613,12 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
if (detach_auto) {
int ret = report_last_gc_error();
if (ret < 0)
/* an I/O error occurred, already reported */
return 128;
if (ret == 1)
/* Last gc --auto failed. Skip this one. */
return 0;
else if (ret)
/* an I/O error occurred, already reported */
return ret;
if (lock_repo_for_gc(force, &pid))
return 0;

1
git-compat-util.h
View File

@ -480,6 +480,7 @@ NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2))
NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
int die_message(const char *err, ...) __attribute__((format (printf, 1, 2)));
int die_message_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
int error_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));

12
usage.c
View File

@ -233,6 +233,18 @@ int die_message(const char *err, ...)
return 128;
}
#undef die_message_errno
int die_message_errno(const char *fmt, ...)
{
char buf[1024];
va_list params;
va_start(params, fmt);
die_message_routine(fmt_with_err(buf, sizeof(buf), fmt), params);
va_end(params);
return 128;
}
#undef error_errno
int error_errno(const char *fmt, ...)
{