The new process's error output may be redirected elsewhere, but if
the exec fails, output should still go to the parent's stderr. This
has already been done for the die_routine. Do the same for
error_routine.
Signed-off-by: Clemens Buchacher <drizzd@xxxxxx>
---
On Wed, Jul 27, 2011 at 09:36:52PM +0200, Johannes Sixt wrote:
>
> This change is not good enough: There is no guarantee that this message
> goes to the right channel (stderr in the child can be redirected).
Ah, good point. I skipped over that part thinking it was not
relevant. This should take care of it.
Clemens
git-compat-util.h | 2 ++
run-command.c | 15 +++++++--------
usage.c | 18 ++++++++++++++++++
3 files changed, 27 insertions(+), 8 deletions(-)
diff --git a/git-compat-util.h b/git-compat-util.h
index a75530d..07cbfe9 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -240,6 +240,7 @@ extern char *gitbasename(char *);
/* General helper functions */
extern void vreportf(const char *prefix, const char *err, va_list params);
+extern void vwritef(int fd, const char *prefix, const char *err, va_list params);
extern NORETURN void usage(const char *err);
extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
@@ -248,6 +249,7 @@ extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
+extern void set_error_routine(void (*routine)(const char *err, va_list params));
extern int prefixcmp(const char *str, const char *prefix);
extern int suffixcmp(const char *str, const char *suffix);
diff --git a/run-command.c b/run-command.c
index c752174..a2796c4 100644
--- a/run-command.c
+++ b/run-command.c
@@ -77,16 +77,14 @@ static void notify_parent(void)
static NORETURN void die_child(const char *err, va_list params)
{
- char msg[4096];
- int len = vsnprintf(msg, sizeof(msg), err, params);
- if (len > sizeof(msg))
- len = sizeof(msg);
-
- write_in_full(child_err, "fatal: ", 7);
- write_in_full(child_err, msg, len);
- write_in_full(child_err, "\n", 1);
+ vwritef(child_err, "fatal: ", err, params);
exit(128);
}
+
+static void error_child(const char *err, va_list params)
+{
+ vwritef(child_err, "error: ", err, params);
+}
#endif
static inline void set_cloexec(int fd)
@@ -214,6 +212,7 @@ fail_pipe:
set_cloexec(child_err);
}
set_die_routine(die_child);
+ set_error_routine(error_child);
close(notify_pipe[0]);
set_cloexec(notify_pipe[1]);
diff --git a/usage.c b/usage.c
index b5e67e3..a2a6678 100644
--- a/usage.c
+++ b/usage.c
@@ -4,6 +4,7 @@
* Copyright (C) Linus Torvalds, 2005
*/
#include "git-compat-util.h"
+#include "cache.h"
void vreportf(const char *prefix, const char *err, va_list params)
{
@@ -12,6 +13,18 @@ void vreportf(const char *prefix, const char *err, va_list params)
fprintf(stderr, "%s%s\n", prefix, msg);
}
+void vwritef(int fd, const char *prefix, const char *err, va_list params)
+{
+ char msg[4096];
+ int len = vsnprintf(msg, sizeof(msg), err, params);
+ if (len > sizeof(msg))
+ len = sizeof(msg);
+
+ write_in_full(fd, prefix, strlen(prefix));
+ write_in_full(fd, msg, len);
+ write_in_full(fd, "\n", 1);
+}
+
static NORETURN void usage_builtin(const char *err, va_list params)
{
vreportf("usage: ", err, params);
@@ -46,6 +59,11 @@ void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list param
die_routine = routine;
}
+void set_error_routine(void (*routine)(const char *err, va_list params))
+{
+ error_routine = routine;
+}
+
void NORETURN usagef(const char *err, ...)
{
va_list params;
--
1.7.3.1.105.g84915
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