Permalink
| /* | |
| * GIT - The information manager from hell | |
| * | |
| * Copyright (C) Linus Torvalds, 2005 | |
| */ | |
| #include "git-compat-util.h" | |
| #include "cache.h" | |
| void vreportf(const char *prefix, const char *err, va_list params) | |
| { | |
| char msg[4096]; | |
| char *p; | |
| vsnprintf(msg, sizeof(msg), err, params); | |
| for (p = msg; *p; p++) { | |
| if (iscntrl(*p) && *p != '\t' && *p != '\n') | |
| *p = '?'; | |
| } | |
| fprintf(stderr, "%s%s\n", prefix, msg); | |
| } | |
| static NORETURN void usage_builtin(const char *err, va_list params) | |
| { | |
| vreportf("usage: ", err, params); | |
| exit(129); | |
| } | |
| static NORETURN void die_builtin(const char *err, va_list params) | |
| { | |
| vreportf("fatal: ", err, params); | |
| exit(128); | |
| } | |
| static void error_builtin(const char *err, va_list params) | |
| { | |
| vreportf("error: ", err, params); | |
| } | |
| static void warn_builtin(const char *warn, va_list params) | |
| { | |
| vreportf("warning: ", warn, params); | |
| } | |
| static int die_is_recursing_builtin(void) | |
| { | |
| static int dying; | |
| /* | |
| * Just an arbitrary number X where "a < x < b" where "a" is | |
| * "maximum number of pthreads we'll ever plausibly spawn" and | |
| * "b" is "something less than Inf", since the point is to | |
| * prevent infinite recursion. | |
| */ | |
| static const int recursion_limit = 1024; | |
| dying++; | |
| if (dying > recursion_limit) { | |
| return 1; | |
| } else if (dying == 2) { | |
| warning("die() called many times. Recursion error or racy threaded death!"); | |
| return 0; | |
| } else { | |
| return 0; | |
| } | |
| } | |
| /* 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)) | |
| { | |
| die_routine = routine; | |
| } | |
| void set_error_routine(void (*routine)(const char *err, va_list params)) | |
| { | |
| error_routine = routine; | |
| } | |
| void (*get_error_routine(void))(const char *err, va_list params) | |
| { | |
| return error_routine; | |
| } | |
| void set_warn_routine(void (*routine)(const char *warn, va_list params)) | |
| { | |
| warn_routine = routine; | |
| } | |
| void (*get_warn_routine(void))(const char *warn, va_list params) | |
| { | |
| return warn_routine; | |
| } | |
| void set_die_is_recursing_routine(int (*routine)(void)) | |
| { | |
| die_is_recursing = routine; | |
| } | |
| 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); | |
| } | |
| static const char *fmt_with_err(char *buf, int n, const char *fmt) | |
| { | |
| 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(buf, n, "%s: %s", fmt, str_error); | |
| return buf; | |
| } | |
| void NORETURN die_errno(const char *fmt, ...) | |
| { | |
| char buf[1024]; | |
| va_list params; | |
| if (die_is_recursing()) { | |
| fputs("fatal: recursion detected in die_errno handler\n", | |
| stderr); | |
| exit(128); | |
| } | |
| va_start(params, fmt); | |
| die_routine(fmt_with_err(buf, sizeof(buf), fmt), params); | |
| va_end(params); | |
| } | |
| #undef error_errno | |
| int error_errno(const char *fmt, ...) | |
| { | |
| char buf[1024]; | |
| va_list params; | |
| va_start(params, fmt); | |
| error_routine(fmt_with_err(buf, sizeof(buf), fmt), params); | |
| va_end(params); | |
| return -1; | |
| } | |
| #undef error | |
| int error(const char *err, ...) | |
| { | |
| va_list params; | |
| va_start(params, err); | |
| error_routine(err, params); | |
| va_end(params); | |
| return -1; | |
| } | |
| void warning_errno(const char *warn, ...) | |
| { | |
| char buf[1024]; | |
| va_list params; | |
| va_start(params, warn); | |
| warn_routine(fmt_with_err(buf, sizeof(buf), warn), params); | |
| va_end(params); | |
| } | |
| void warning(const char *warn, ...) | |
| { | |
| va_list params; | |
| va_start(params, warn); | |
| warn_routine(warn, params); | |
| va_end(params); | |
| } | |
| static NORETURN void BUG_vfl(const char *file, int line, const char *fmt, va_list params) | |
| { | |
| char prefix[256]; | |
| /* truncation via snprintf is OK here */ | |
| if (file) | |
| snprintf(prefix, sizeof(prefix), "BUG: %s:%d: ", file, line); | |
| else | |
| snprintf(prefix, sizeof(prefix), "BUG: "); | |
| vreportf(prefix, fmt, params); | |
| abort(); | |
| } | |
| #ifdef HAVE_VARIADIC_MACROS | |
| NORETURN void BUG_fl(const char *file, int line, const char *fmt, ...) | |
| { | |
| va_list ap; | |
| va_start(ap, fmt); | |
| BUG_vfl(file, line, fmt, ap); | |
| va_end(ap); | |
| } | |
| #else | |
| NORETURN void BUG(const char *fmt, ...) | |
| { | |
| va_list ap; | |
| va_start(ap, fmt); | |
| BUG_vfl(NULL, 0, fmt, ap); | |
| va_end(ap); | |
| } | |
| #endif |