[RFC/PATCH 03/18] usage: implement error_errno() the same way as die_errno()
- From
Christian Couder <chriscool@tuxfamily.org>
- Date
- Nov 25, 2010, 21:20 UTC
- Message-ID
- <20101125212050.5188.56613.chriscool@tuxfamily.org>
- In-Reply-To
- <20101125210138.5188.13115.chriscool@tuxfamily.org>
die_errno() is very useful, but sometimes we don't want to die after printing an error message and the error message from errno. So let's implement error_errno() that does the same thing as die_errno() except that it calls error_routine() instead of die_routine().
Signed-off-by: Christian Couder <chriscool@tuxfamily.org> --- git-compat-util.h | 1 + usage.c | 28 ++++++++++++++++++++++++---- 2 files changed, 25 insertions(+), 4 deletions(-)
diff --git a/git-compat-util.h b/git-compat-util.h index 490f969..32294cc 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -230,6 +230,7 @@ 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))); extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); +extern int error_errno(const char *err, ...) __attribute__((format (printf, 1, 2))); extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); diff --git a/usage.c b/usage.c index ec4cf53..f3ac869 100644 --- a/usage.c +++ b/usage.c @@ -69,10 +69,9 @@ void die(const char *err, ...) va_end(params); } -void die_errno(const char *fmt, ...) +static void format_errno(char *fmt_with_err, size_t fmt_with_err_size, + const char *fmt) { - va_list params; - char fmt_with_err[1024]; char str_error[256], *err; int i, j; @@ -90,13 +89,34 @@ void die_errno(const char *fmt, ...) } } str_error[j] = 0; - snprintf(fmt_with_err, sizeof(fmt_with_err), "%s: %s", fmt, str_error); + snprintf(fmt_with_err, fmt_with_err_size, "%s: %s", fmt, str_error); +} + +void die_errno(const char *fmt, ...) +{ + va_list params; + char fmt_with_err[1024]; + + format_errno(fmt_with_err, sizeof(fmt_with_err), fmt); va_start(params, fmt); die_routine(fmt_with_err, params); va_end(params); } +int error_errno(const char *fmt, ...) +{ + va_list params; + char fmt_with_err[1024]; + + format_errno(fmt_with_err, sizeof(fmt_with_err), fmt); + + va_start(params, fmt); + error_routine(fmt_with_err, params); + va_end(params); + return -1; +} + int error(const char *err, ...) { va_list params;
-- 1.7.3.2.504.g59d466