* Copyright (C) Linus Torvalds, 2005
*/
#include "git-compat-util.h"
+#include "cache.h"
-static void report(const char *prefix, const char *err, va_list params)
+static FILE *error_handle;
+static int tweaked_error_buffering;
+
+void vreportf(const char *prefix, const char *err, va_list params)
{
- char msg[1024];
- vsnprintf(msg, sizeof(msg), err, params);
- fprintf(stderr, "%s%s\n", prefix, msg);
+ FILE *fh = error_handle ? error_handle : stderr;
+
+ fflush(fh);
+ if (!tweaked_error_buffering) {
+ setvbuf(fh, NULL, _IOLBF, 0);
+ tweaked_error_buffering = 1;
+ }
+
+ fputs(prefix, fh);
+ vfprintf(fh, err, params);
+ fputc('\n', fh);
}
-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);
+ vreportf("usage: ", err, params);
exit(129);
}
static NORETURN void die_builtin(const char *err, va_list params)
{
- report("fatal: ", err, params);
+ vreportf("fatal: ", err, params);
exit(128);
}
static void error_builtin(const char *err, va_list params)
{
- report("error: ", err, params);
+ vreportf("error: ", err, params);
}
static void warn_builtin(const char *warn, va_list params)
{
- report("warning: ", warn, params);
+ vreportf("warning: ", warn, params);
+}
+
+static int die_is_recursing_builtin(void)
+{
+ static int dying;
+ return dying++;
}
/* 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;
+static int (*die_is_recursing)(void) = die_is_recursing_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 usage(const char *err)
+void set_error_routine(void (*routine)(const char *err, va_list params))
+{
+ error_routine = routine;
+}
+
+void set_die_is_recursing_routine(int (*routine)(void))
+{
+ die_is_recursing = routine;
+}
+
+void set_error_handle(FILE *fh)
{
- usage_routine(err);
+ error_handle = fh;
+ tweaked_error_buffering = 0;
}
-void die(const char *err, ...)
+void NORETURN usagef(const char *err, ...)
{
va_list params;
+ va_start(params, err);
+ usage_routine(err, params);
+ va_end(params);
+}
+
+void NORETURN usage(const char *err)
+{
+ usagef("%s", err);
+}
+
+void NORETURN die(const char *err, ...)
+{
+ va_list params;
+
+ if (die_is_recursing()) {
+ fputs("fatal: recursion detected in die handler\n", stderr);
+ exit(128);
+ }
+
va_start(params, err);
die_routine(err, params);
va_end(params);
}
+void NORETURN die_errno(const char *fmt, ...)
+{
+ va_list params;
+ char fmt_with_err[1024];
+ char str_error[256], *err;
+ int i, j;
+
+ if (die_is_recursing()) {
+ fputs("fatal: recursion detected in die_errno handler\n",
+ stderr);
+ exit(128);
+ }
+
+ 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);
+}
+
+#undef error
int error(const char *err, ...)
{
va_list params;