1 /* 2 * usage.c 3 * 4 * Various reporting routines. 5 * Originally copied from GIT source. 6 * 7 * Copyright (C) Linus Torvalds, 2005 8 */ 9 #include "util.h" 10 #include "debug.h" 11 12 static void report(const char *prefix, const char *err, va_list params) 13 { 14 char msg[1024]; 15 vsnprintf(msg, sizeof(msg), err, params); 16 fprintf(stderr, " %s%s\n", prefix, msg); 17 } 18 19 static __noreturn void usage_builtin(const char *err) 20 { 21 fprintf(stderr, "\n Usage: %s\n", err); 22 exit(129); 23 } 24 25 static __noreturn void die_builtin(const char *err, va_list params) 26 { 27 report(" Fatal: ", err, params); 28 exit(128); 29 } 30 31 /* If we are in a dlopen()ed .so write to a global variable would segfault 32 * (ugh), so keep things static. */ 33 static void (*usage_routine)(const char *err) __noreturn = usage_builtin; 34 35 void usage(const char *err) 36 { 37 usage_routine(err); 38 } 39 40 void die(const char *err, ...) 41 { 42 va_list params; 43 44 va_start(params, err); 45 die_builtin(err, params); 46 va_end(params); 47 } 48