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Diffstat (limited to 'usage.c')
-rw-r--r--usage.c51
1 files changed, 44 insertions, 7 deletions
diff --git a/usage.c b/usage.c
index 820d09f92b..79856a2b9f 100644
--- a/usage.c
+++ b/usage.c
@@ -7,14 +7,14 @@
static void report(const char *prefix, const char *err, va_list params)
{
- char msg[1024];
+ char msg[4096];
vsnprintf(msg, sizeof(msg), err, params);
fprintf(stderr, "%s%s\n", prefix, msg);
}
-static NORETURN void usage_builtin(const char *err)
+static NORETURN void usage_builtin(const char *err, va_list params)
{
- fprintf(stderr, "usage: %s\n", err);
+ report("usage: ", err, params);
exit(129);
}
@@ -36,19 +36,28 @@ static void warn_builtin(const char *warn, va_list params)
/* If we are in a dlopen()ed .so write to a global variable would segfault
* (ugh), so keep things static. */
-static void (*usage_routine)(const char *err) NORETURN = usage_builtin;
-static void (*die_routine)(const char *err, va_list params) NORETURN = die_builtin;
+static NORETURN_PTR void (*usage_routine)(const char *err, va_list params) = usage_builtin;
+static NORETURN_PTR void (*die_routine)(const char *err, va_list params) = die_builtin;
static void (*error_routine)(const char *err, va_list params) = error_builtin;
static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
-void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN)
+void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params))
{
die_routine = routine;
}
+void usagef(const char *err, ...)
+{
+ va_list params;
+
+ va_start(params, err);
+ usage_routine(err, params);
+ va_end(params);
+}
+
void usage(const char *err)
{
- usage_routine(err);
+ usagef("%s", err);
}
void die(const char *err, ...)
@@ -60,6 +69,34 @@ void die(const char *err, ...)
va_end(params);
}
+void die_errno(const char *fmt, ...)
+{
+ va_list params;
+ char fmt_with_err[1024];
+ char str_error[256], *err;
+ int i, j;
+
+ err = strerror(errno);
+ for (i = j = 0; err[i] && j < sizeof(str_error) - 1; ) {
+ if ((str_error[j++] = err[i++]) != '%')
+ continue;
+ if (j < sizeof(str_error) - 1) {
+ str_error[j++] = '%';
+ } else {
+ /* No room to double the '%', so we overwrite it with
+ * '\0' below */
+ j--;
+ break;
+ }
+ }
+ str_error[j] = 0;
+ snprintf(fmt_with_err, sizeof(fmt_with_err), "%s: %s", fmt, str_error);
+
+ va_start(params, fmt);
+ die_routine(fmt_with_err, params);
+ va_end(params);
+}
+
int error(const char *err, ...)
{
va_list params;