| /* error.c -- error handler for noninteractive utilities |
| Copyright (C) 1990, 91, 92, 93, 94, 95, 96 Free Software Foundation, Inc. |
| |
| This file is part of the GNU C Library. Its master source is NOT part of |
| the C library, however. The master source lives in /gd/gnu/lib. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with the GNU C Library; see the file COPYING.LIB. If |
| not, write to the Free Software Foundation, Inc., 675 Mass Ave, |
| Cambridge, MA 02139, USA. */ |
| |
| /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include <stdio.h> |
| |
| #if HAVE_VPRINTF || HAVE_DOPRNT || _LIBC |
| # if __STDC__ |
| # include <stdarg.h> |
| # define VA_START(args, lastarg) va_start(args, lastarg) |
| # else |
| # include <varargs.h> |
| # define VA_START(args, lastarg) va_start(args) |
| # endif |
| #else |
| # define va_alist a1, a2, a3, a4, a5, a6, a7, a8 |
| # define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8; |
| #endif |
| |
| #if STDC_HEADERS || _LIBC |
| # include <stdlib.h> |
| # include <string.h> |
| #else |
| void exit (); |
| #endif |
| |
| /* If NULL, error will flush stdout, then print on stderr the program |
| name, a colon and a space. Otherwise, error will call this |
| function without parameters instead. */ |
| void (*error_print_progname) ( |
| #if __STDC__ |
| void |
| #endif |
| ); |
| |
| /* This variable is incremented each time `error' is called. */ |
| unsigned int error_message_count; |
| |
| #ifdef _LIBC |
| /* In the GNU C library, there is a predefined variable for this. */ |
| |
| #define program_name program_invocation_name |
| #include <errno.h> |
| |
| #else |
| |
| /* The calling program should define program_name and set it to the |
| name of the executing program. */ |
| extern char *program_name; |
| |
| #if HAVE_STRERROR |
| # ifndef strerror /* On some systems, strerror is a macro */ |
| char *strerror (); |
| # endif |
| #else |
| static char * |
| private_strerror (errnum) |
| int errnum; |
| { |
| extern char *sys_errlist[]; |
| extern int sys_nerr; |
| |
| if (errnum > 0 && errnum <= sys_nerr) |
| return sys_errlist[errnum]; |
| return "Unknown system error"; |
| } |
| #define strerror private_strerror |
| #endif /* HAVE_STRERROR */ |
| #endif /* _LIBC */ |
| |
| /* Print the program name and error message MESSAGE, which is a printf-style |
| format string with optional args. |
| If ERRNUM is nonzero, print its corresponding system error message. |
| Exit with status STATUS if it is nonzero. */ |
| /* VARARGS */ |
| |
| void |
| #if defined(VA_START) && __STDC__ |
| error (int status, int errnum, const char *message, ...) |
| #else |
| error (status, errnum, message, va_alist) |
| int status; |
| int errnum; |
| char *message; |
| va_dcl |
| #endif |
| { |
| #ifdef VA_START |
| va_list args; |
| #endif |
| |
| if (error_print_progname) |
| (*error_print_progname) (); |
| else |
| { |
| fflush (stdout); |
| fprintf (stderr, "%s: ", program_name); |
| } |
| |
| #ifdef VA_START |
| VA_START (args, message); |
| # if HAVE_VPRINTF || _LIBC |
| vfprintf (stderr, message, args); |
| # else |
| _doprnt (message, args, stderr); |
| # endif |
| va_end (args); |
| #else |
| fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8); |
| #endif |
| |
| ++error_message_count; |
| |
| if (errnum) |
| fprintf (stderr, ": %s", strerror (errnum)); |
| putc ('\n', stderr); |
| fflush (stderr); |
| if (status) |
| exit (status); |
| } |