Andrew's git - gitweb.git/blob

   1/*
   2 * GIT - The information manager from hell
   3 *
   4 * Copyright (C) Linus Torvalds, 2005
   5 */
   6#include "git-compat-util.h"
   7#include "cache.h"
   8
   9static FILE *error_handle;
  10static int tweaked_error_buffering;
  11
  12void vreportf(const char *prefix, const char *err, va_list params)
  13{
  14        FILE *fh = error_handle ? error_handle : stderr;
  15
  16        fflush(fh);
  17        if (!tweaked_error_buffering) {
  18                setvbuf(fh, NULL, _IOLBF, 0);
  19                tweaked_error_buffering = 1;
  20        }
  21
  22        fputs(prefix, fh);
  23        vfprintf(fh, err, params);
  24        fputc('\n', fh);
  25}
  26
  27static NORETURN void usage_builtin(const char *err, va_list params)
  28{
  29        vreportf("usage: ", err, params);
  30        exit(129);
  31}
  32
  33static NORETURN void die_builtin(const char *err, va_list params)
  34{
  35        vreportf("fatal: ", err, params);
  36        exit(128);
  37}
  38
  39static void error_builtin(const char *err, va_list params)
  40{
  41        vreportf("error: ", err, params);
  42}
  43
  44static void warn_builtin(const char *warn, va_list params)
  45{
  46        vreportf("warning: ", warn, params);
  47}
  48
  49static int die_is_recursing_builtin(void)
  50{
  51        static int dying;
  52        return dying++;
  53}
  54
  55/* If we are in a dlopen()ed .so write to a global variable would segfault
  56 * (ugh), so keep things static. */
  57static NORETURN_PTR void (*usage_routine)(const char *err, va_list params) = usage_builtin;
  58static NORETURN_PTR void (*die_routine)(const char *err, va_list params) = die_builtin;
  59static void (*error_routine)(const char *err, va_list params) = error_builtin;
  60static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
  61static int (*die_is_recursing)(void) = die_is_recursing_builtin;
  62
  63void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params))
  64{
  65        die_routine = routine;
  66}
  67
  68void set_error_routine(void (*routine)(const char *err, va_list params))
  69{
  70        error_routine = routine;
  71}
  72
  73void set_die_is_recursing_routine(int (*routine)(void))
  74{
  75        die_is_recursing = routine;
  76}
  77
  78void set_error_handle(FILE *fh)
  79{
  80        error_handle = fh;
  81        tweaked_error_buffering = 0;
  82}
  83
  84void NORETURN usagef(const char *err, ...)
  85{
  86        va_list params;
  87
  88        va_start(params, err);
  89        usage_routine(err, params);
  90        va_end(params);
  91}
  92
  93void NORETURN usage(const char *err)
  94{
  95        usagef("%s", err);
  96}
  97
  98void NORETURN die(const char *err, ...)
  99{
 100        va_list params;
 101
 102        if (die_is_recursing()) {
 103                fputs("fatal: recursion detected in die handler\n", stderr);
 104                exit(128);
 105        }
 106
 107        va_start(params, err);
 108        die_routine(err, params);
 109        va_end(params);
 110}
 111
 112static const char *fmt_with_err(char *buf, int n, const char *fmt)
 113{
 114        char str_error[256], *err;
 115        int i, j;
 116
 117        err = strerror(errno);
 118        for (i = j = 0; err[i] && j < sizeof(str_error) - 1; ) {
 119                if ((str_error[j++] = err[i++]) != '%')
 120                        continue;
 121                if (j < sizeof(str_error) - 1) {
 122                        str_error[j++] = '%';
 123                } else {
 124                        /* No room to double the '%', so we overwrite it with
 125                         * '\0' below */
 126                        j--;
 127                        break;
 128                }
 129        }
 130        str_error[j] = 0;
 131        snprintf(buf, n, "%s: %s", fmt, str_error);
 132        return buf;
 133}
 134
 135void NORETURN die_errno(const char *fmt, ...)
 136{
 137        char buf[1024];
 138        va_list params;
 139
 140        if (die_is_recursing()) {
 141                fputs("fatal: recursion detected in die_errno handler\n",
 142                        stderr);
 143                exit(128);
 144        }
 145
 146        va_start(params, fmt);
 147        die_routine(fmt_with_err(buf, sizeof(buf), fmt), params);
 148        va_end(params);
 149}
 150
 151#undef error_errno
 152int error_errno(const char *fmt, ...)
 153{
 154        char buf[1024];
 155        va_list params;
 156
 157        va_start(params, fmt);
 158        error_routine(fmt_with_err(buf, sizeof(buf), fmt), params);
 159        va_end(params);
 160        return -1;
 161}
 162
 163#undef error
 164int error(const char *err, ...)
 165{
 166        va_list params;
 167
 168        va_start(params, err);
 169        error_routine(err, params);
 170        va_end(params);
 171        return -1;
 172}
 173
 174void warning_errno(const char *warn, ...)
 175{
 176        char buf[1024];
 177        va_list params;
 178
 179        va_start(params, warn);
 180        warn_routine(fmt_with_err(buf, sizeof(buf), warn), params);
 181        va_end(params);
 182}
 183
 184void warning(const char *warn, ...)
 185{
 186        va_list params;
 187
 188        va_start(params, warn);
 189        warn_routine(warn, params);
 190        va_end(params);
 191}