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 static void error_builtin(const char *err, va_list params) 32 { 33 report(" Error: ", err, params); 34 } 35 36 static void warn_builtin(const char *warn, va_list params) 37 { 38 report(" Warning: ", warn, params); 39 } 40 41 /* If we are in a dlopen()ed .so write to a global variable would segfault 42 * (ugh), so keep things static. */ 43 static void (*usage_routine)(const char *err) NORETURN = usage_builtin; 44 static void (*die_routine)(const char *err, va_list params) NORETURN = die_builtin; 45 static void (*error_routine)(const char *err, va_list params) = error_builtin; 46 static void (*warn_routine)(const char *err, va_list params) = warn_builtin; 47 48 void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN) 49 { 50 die_routine = routine; 51 } 52 53 void set_warning_routine(void (*routine)(const char *err, va_list params)) 54 { 55 warn_routine = routine; 56 } 57 58 void usage(const char *err) 59 { 60 usage_routine(err); 61 } 62 63 void die(const char *err, ...) 64 { 65 va_list params; 66 67 va_start(params, err); 68 die_routine(err, params); 69 va_end(params); 70 } 71 72 int error(const char *err, ...) 73 { 74 va_list params; 75 76 va_start(params, err); 77 error_routine(err, params); 78 va_end(params); 79 return -1; 80 } 81 82 void warning(const char *warn, ...) 83 { 84 va_list params; 85 86 va_start(params, warn); 87 warn_routine(warn, params); 88 va_end(params); 89 } 90