[PATCH v2 1/3] Introduce die_errno() that appends strerror(errno) to die()
- From
Thomas Rast <trast@student.ethz.ch>
- Date
- Jun 6, 2009, 14:44 UTC
- Message-ID
- <3672f22723a4c14c4a6d67278e9865424c0c68dc.1244299302.git.trast@student.ethz.ch>
- In-Reply-To
- <cover.1244299302.git.trast@student.ethz.ch>
There are many calls to die() that do, or should, report strerror(errno) to indicate how the syscall they guard failed. Introduce a small helper function for this case.
Code by Jeff King and Alexander Potashev, name by Johannes Sixt.
Signed-off-by: Thomas Rast <trast@student.ethz.ch> --- git-compat-util.h | 1 + usage.c | 13 +++++++++++++ 2 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/git-compat-util.h b/git-compat-util.h index f25f7f1..0366cde 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -162,6 +162,7 @@ /* General helper functions */ extern void usage(const char *err) NORETURN; extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2))); +extern void die_errno(const char *err, ...) NORETURN __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 820d09f..1819e0a 100644 --- a/usage.c +++ b/usage.c @@ -60,6 +60,19 @@ void die(const char *err, ...) va_end(params); } +void die_errno(const char *err, ...) +{ + va_list params; + char msg[1024]; + + va_start(params, err); + + vsnprintf(msg, sizeof(msg), err, params); + die("%s: %s", msg, strerror(errno)); + + va_end(params); +} + int error(const char *err, ...) { va_list params;
-- 1.6.3.2.288.g40844