Annotation of embedaddon/lrzsz/lib/error.c, revision 1.1
1.1 ! misho 1: /* error.c -- error handler for noninteractive utilities
! 2: Copyright (C) 1990, 91, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
! 3:
! 4: This program is free software; you can redistribute it and/or modify
! 5: it under the terms of the GNU General Public License as published by
! 6: the Free Software Foundation; either version 2, or (at your option)
! 7: any later version.
! 8:
! 9: This program is distributed in the hope that it will be useful,
! 10: but WITHOUT ANY WARRANTY; without even the implied warranty of
! 11: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! 12: GNU General Public License for more details.
! 13:
! 14: You should have received a copy of the GNU General Public License
! 15: along with this program; if not, write to the Free Software
! 16: Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
! 17:
! 18: /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
! 19:
! 20: #ifdef HAVE_CONFIG_H
! 21: # include <config.h>
! 22: #endif
! 23:
! 24: #include <stdio.h>
! 25:
! 26: #if HAVE_VPRINTF || HAVE_DOPRNT || _LIBC
! 27: # if __STDC__
! 28: # include <stdarg.h>
! 29: # define VA_START(args, lastarg) va_start(args, lastarg)
! 30: # else
! 31: # include <varargs.h>
! 32: # define VA_START(args, lastarg) va_start(args)
! 33: # endif
! 34: #else
! 35: # define va_alist a1, a2, a3, a4, a5, a6, a7, a8
! 36: # define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
! 37: #endif
! 38:
! 39: #if STDC_HEADERS || _LIBC
! 40: # include <stdlib.h>
! 41: # include <string.h>
! 42: #else
! 43: void exit ();
! 44: #endif
! 45:
! 46: #ifndef _
! 47: # define _(String) String
! 48: #endif
! 49:
! 50: /* If NULL, error will flush stdout, then print on stderr the program
! 51: name, a colon and a space. Otherwise, error will call this
! 52: function without parameters instead. */
! 53: void (*error_print_progname) (
! 54: #if __STDC__ - 0
! 55: void
! 56: #endif
! 57: );
! 58:
! 59: /* This variable is incremented each time `error' is called. */
! 60: unsigned int error_message_count;
! 61:
! 62: #ifdef _LIBC
! 63: /* In the GNU C library, there is a predefined variable for this. */
! 64:
! 65: # define program_name program_invocation_name
! 66: # include <errno.h>
! 67:
! 68: #else
! 69:
! 70: /* The calling program should define program_name and set it to the
! 71: name of the executing program. */
! 72: extern char *program_name;
! 73:
! 74: # if HAVE_STRERROR
! 75: # ifndef strerror /* On some systems, strerror is a macro */
! 76: char *strerror ();
! 77: # endif
! 78: # else
! 79: static char *
! 80: private_strerror (errnum)
! 81: int errnum;
! 82: {
! 83: extern char *sys_errlist[];
! 84: extern int sys_nerr;
! 85:
! 86: if (errnum > 0 && errnum <= sys_nerr)
! 87: return sys_errlist[errnum];
! 88: return _("Unknown system error");
! 89: }
! 90: # define strerror private_strerror
! 91: # endif /* HAVE_STRERROR */
! 92: #endif /* _LIBC */
! 93:
! 94: /* Print the program name and error message MESSAGE, which is a printf-style
! 95: format string with optional args.
! 96: If ERRNUM is nonzero, print its corresponding system error message.
! 97: Exit with status STATUS if it is nonzero. */
! 98: /* VARARGS */
! 99:
! 100: void
! 101: #if defined(VA_START) && __STDC__
! 102: error (int status, int errnum, const char *message, ...)
! 103: #else
! 104: error (status, errnum, message, va_alist)
! 105: int status;
! 106: int errnum;
! 107: char *message;
! 108: va_dcl
! 109: #endif
! 110: {
! 111: #ifdef VA_START
! 112: va_list args;
! 113: #endif
! 114:
! 115: if (error_print_progname)
! 116: (*error_print_progname) ();
! 117: else
! 118: {
! 119: fflush (stdout);
! 120: fprintf (stderr, "%s: ", program_name);
! 121: }
! 122:
! 123: #ifdef VA_START
! 124: VA_START (args, message);
! 125: # if HAVE_VPRINTF || _LIBC
! 126: vfprintf (stderr, message, args);
! 127: # else
! 128: _doprnt (message, args, stderr);
! 129: # endif
! 130: va_end (args);
! 131: #else
! 132: fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
! 133: #endif
! 134:
! 135: ++error_message_count;
! 136: if (errnum)
! 137: fprintf (stderr, ": %s", strerror (errnum));
! 138: putc ('\n', stderr);
! 139: fflush (stderr);
! 140: if (status)
! 141: exit (status);
! 142: }
! 143:
! 144: /* Sometimes we want to have at most one error per line. This
! 145: variable controls whether this mode is selected or not. */
! 146: int error_one_per_line;
! 147:
! 148: void
! 149: #if defined(VA_START) && __STDC__
! 150: error_at_line (int status, int errnum, const char *file_name,
! 151: unsigned int line_number, const char *message, ...)
! 152: #else
! 153: error_at_line (status, errnum, file_name, line_number, message, va_alist)
! 154: int status;
! 155: int errnum;
! 156: const char *file_name;
! 157: unsigned int line_number;
! 158: char *message;
! 159: va_dcl
! 160: #endif
! 161: {
! 162: #ifdef VA_START
! 163: va_list args;
! 164: #endif
! 165:
! 166: if (error_one_per_line)
! 167: {
! 168: static const char *old_file_name;
! 169: static unsigned int old_line_number;
! 170:
! 171: if (old_line_number == line_number &&
! 172: (file_name == old_file_name || !strcmp (old_file_name, file_name)))
! 173: /* Simply return and print nothing. */
! 174: return;
! 175:
! 176: old_file_name = file_name;
! 177: old_line_number = line_number;
! 178: }
! 179:
! 180: if (error_print_progname)
! 181: (*error_print_progname) ();
! 182: else
! 183: {
! 184: fflush (stdout);
! 185: fprintf (stderr, "%s:", program_name);
! 186: }
! 187:
! 188: if (file_name != NULL)
! 189: fprintf (stderr, "%s:%d: ", file_name, line_number);
! 190:
! 191: #ifdef VA_START
! 192: VA_START (args, message);
! 193: # if HAVE_VPRINTF || _LIBC
! 194: vfprintf (stderr, message, args);
! 195: # else
! 196: _doprnt (message, args, stderr);
! 197: # endif
! 198: va_end (args);
! 199: #else
! 200: fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
! 201: #endif
! 202:
! 203: ++error_message_count;
! 204: if (errnum)
! 205: fprintf (stderr, ": %s", strerror (errnum));
! 206: putc ('\n', stderr);
! 207: fflush (stderr);
! 208: if (status)
! 209: exit (status);
! 210: }
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