diff options
Diffstat (limited to 'usage.c')
| -rw-r--r-- | usage.c | 24 |
1 files changed, 24 insertions, 0 deletions
@@ -47,12 +47,19 @@ static void warn_builtin(const char *warn, va_list 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 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(NORETURN_PTR void (*routine)(const char *err, va_list params)) { @@ -64,6 +71,11 @@ 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 NORETURN usagef(const char *err, ...) { va_list params; @@ -82,6 +94,11 @@ 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); @@ -94,6 +111,12 @@ void NORETURN die_errno(const char *fmt, ...) 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++]) != '%') @@ -115,6 +138,7 @@ void NORETURN die_errno(const char *fmt, ...) va_end(params); } +#undef error int error(const char *err, ...) { va_list params; |