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1 /* error.c -- error handler for noninteractive utilities |
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2 Copyright (C) 1990, 1991, 1992 Free Software Foundation, Inc. |
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3 |
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4 This program is free software; you can redistribute it and/or modify |
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5 it under the terms of the GNU General Public License as published by |
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6 the Free Software Foundation; either version 2, or (at your option) |
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7 any later version. |
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8 |
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9 This program is distributed in the hope that it will be useful, |
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 GNU General Public License for more details. |
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13 |
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14 You should have received a copy of the GNU General Public License |
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15 along with this program; if not, write to the Free Software |
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16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
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17 |
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18 /* Written by David MacKenzie. */ |
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19 |
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20 #include <stdio.h> |
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21 |
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22 #ifdef HAVE_VPRINTF |
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23 |
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24 #if __STDC__ |
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25 #include <stdarg.h> |
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26 #define VA_START(args, lastarg) va_start(args, lastarg) |
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27 #else /* !__STDC__ */ |
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28 #include <varargs.h> |
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29 #define VA_START(args, lastarg) va_start(args) |
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30 #endif /* !__STDC__ */ |
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31 |
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32 #else /* !HAVE_VPRINTF */ |
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33 |
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34 #ifdef HAVE_DOPRNT |
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35 #define va_alist args |
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36 #define va_dcl int args; |
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37 #else /* !HAVE_DOPRNT */ |
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38 #define va_alist a1, a2, a3, a4, a5, a6, a7, a8 |
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39 #define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8; |
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40 #endif /* !HAVE_DOPRNT */ |
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41 |
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42 #endif /* !HAVE_VPRINTF */ |
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43 |
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44 #ifdef STDC_HEADERS |
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45 #include <stdlib.h> |
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46 #include <string.h> |
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47 #else /* !STDC_HEADERS */ |
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48 void exit (); |
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49 #endif /* !STDC_HEADERS */ |
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50 |
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51 #ifndef HAVE_STRERROR |
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52 static char * |
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53 private_strerror (errnum) |
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54 int errnum; |
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55 { |
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56 extern char *sys_errlist[]; |
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57 extern int sys_nerr; |
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58 |
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59 if (errnum > 0 && errnum <= sys_nerr) |
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60 return sys_errlist[errnum]; |
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61 return "Unknown system error"; |
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62 } |
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63 #define strerror private_strerror |
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64 #endif /* !HAVE_STRERROR */ |
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65 |
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66 /* Print the program name and error message MESSAGE, which is a printf-style |
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67 format string with optional args. |
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68 If ERRNUM is nonzero, print its corresponding system error message. |
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69 Exit with status STATUS if it is nonzero. */ |
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70 /* VARARGS */ |
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71 void |
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72 #if defined (HAVE_VPRINTF) && __STDC__ |
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73 error (int status, int errnum, char *message, ...) |
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74 #else /* !HAVE_VPRINTF or !__STDC__ */ |
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75 error (status, errnum, message, va_alist) |
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76 int status; |
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77 int errnum; |
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78 char *message; |
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79 va_dcl |
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80 #endif /* !HAVE_VPRINTF or !__STDC__ */ |
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81 { |
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82 extern char *program_name; |
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83 #ifdef HAVE_VPRINTF |
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84 va_list args; |
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85 #endif /* HAVE_VPRINTF */ |
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86 |
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87 fprintf (stderr, "%s: ", program_name); |
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88 #ifdef HAVE_VPRINTF |
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89 VA_START (args, message); |
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90 vfprintf (stderr, message, args); |
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91 va_end (args); |
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92 #else /* !HAVE_VPRINTF */ |
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93 #ifdef HAVE_DOPRNT |
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94 _doprnt (message, &args, stderr); |
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95 #else /* !HAVE_DOPRNT */ |
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96 fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8); |
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97 #endif /* !HAVE_DOPRNT */ |
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98 #endif /* !HAVE_VPRINTF */ |
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99 if (errnum) |
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100 fprintf (stderr, ": %s", strerror (errnum)); |
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101 putc ('\n', stderr); |
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102 fflush (stderr); |
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103 if (status) |
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104 exit (status); |
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105 } |
