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authorPetr Baudis <pasky@suse.cz>2006-06-24 04:34:38 +0200
committerJunio C Hamano <junkio@cox.net>2006-06-24 00:12:52 -0700
commit39a3f5ea7c0352a530338d30d4e618f6b4db84e4 (patch)
tree4e9b71c23ccb877c6ee73eeca278ad5c604a8eb9 /usage.c
parent5e7c91d6f744dbf9a18152d2d49057aa3dd06160 (diff)
downloadgit-39a3f5ea7c0352a530338d30d4e618f6b4db84e4.tar.gz
git-39a3f5ea7c0352a530338d30d4e618f6b4db84e4.tar.xz
Customizable error handlers
This patch makes the usage(), die() and error() handlers customizable. Nothing in the git code itself uses that but many other libgit users (like Git.pm) will. This is implemented using the mutator functions primarily because you cannot directly modifying global variables of libgit from a program that dlopen()ed it, apparently. But having functions for that is a better API anyway. Signed-off-by: Petr Baudis <pasky@suse.cz> Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'usage.c')
-rw-r--r--usage.c46
1 files changed, 42 insertions, 4 deletions
diff --git a/usage.c b/usage.c
index 1fa924c3d..b781b0061 100644
--- a/usage.c
+++ b/usage.c
@@ -12,20 +12,58 @@ static void report(const char *prefix, const char *err, va_list params)
fputs("\n", stderr);
}
-void usage(const char *err)
+void usage_builtin(const char *err)
{
fprintf(stderr, "usage: %s\n", err);
exit(129);
}
+void die_builtin(const char *err, va_list params)
+{
+ report("fatal: ", err, params);
+ exit(128);
+}
+
+void error_builtin(const char *err, va_list params)
+{
+ report("error: ", err, 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 void (*error_routine)(const char *err, va_list params) = error_builtin;
+
+void set_usage_routine(void (*routine)(const char *err) NORETURN)
+{
+ usage_routine = routine;
+}
+
+void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN)
+{
+ die_routine = routine;
+}
+
+void set_error_routine(void (*routine)(const char *err, va_list params))
+{
+ error_routine = routine;
+}
+
+
+void usage(const char *err)
+{
+ usage_routine(err);
+}
+
void die(const char *err, ...)
{
va_list params;
va_start(params, err);
- report("fatal: ", err, params);
+ die_routine(err, params);
va_end(params);
- exit(128);
}
int error(const char *err, ...)
@@ -33,7 +71,7 @@ int error(const char *err, ...)
va_list params;
va_start(params, err);
- report("error: ", err, params);
+ error_routine(err, params);
va_end(params);
return -1;
}