/* $NetBSD: error.c,v 1.1.1.1 2016/01/13 03:15:30 christos Exp $ */ /* Error handler for noninteractive utilities Copyright (C) 1990-1998, 2000, 2001 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. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Written by David MacKenzie . */ #ifdef HAVE_CONFIG_H # include #endif #include #if HAVE_LIBINTL_H # include #endif #ifdef _LIBC # include # define mbsrtowcs __mbsrtowcs #endif #if HAVE_VPRINTF || HAVE_DOPRNT || _LIBC # if __STDC__ # include # define VA_START(args, lastarg) va_start(args, lastarg) # else # include # 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 # include #else void exit (); #endif #include "error.h" #include "unlocked-io.h" #ifndef _ # define _(String) String #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__ - 0 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 /* In GNU libc we want do not want to use the common name `error' directly. Instead make it a weak alias. */ extern void __error (int status, int errnum, const char *message, ...) __attribute__ ((__format__ (__printf__, 3, 4))); extern void __error_at_line (int status, int errnum, const char *file_name, unsigned int line_number, const char *message, ...) __attribute__ ((__format__ (__printf__, 5, 6)));; # define error __error # define error_at_line __error_at_line # ifdef USE_IN_LIBIO # include # define fflush(s) _IO_fflush (s) # endif #else /* not _LIBC */ # if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P # ifndef HAVE_DECL_STRERROR_R "this configure-time declaration test was not run" # endif char *strerror_r (); # endif /* The calling program should define program_name and set it to the name of the executing program. */ extern char *program_name; # if HAVE_STRERROR_R || defined strerror_r # define __strerror_r strerror_r # else # if HAVE_STRERROR # ifndef HAVE_DECL_STRERROR "this configure-time declaration test was not run" # endif # if !HAVE_DECL_STRERROR char *strerror (); # endif # else static char * private_strerror (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 /* HAVE_STRERROR_R || defined strerror_r */ #endif /* not _LIBC */ static void print_errno_message (int errnum) { char const *s; #if defined HAVE_STRERROR_R || _LIBC char errbuf[1024]; # if STRERROR_R_CHAR_P || _LIBC s = __strerror_r (errnum, errbuf, sizeof errbuf); # else if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0) s = errbuf; else s = 0; # endif #else s = strerror (errnum); #endif #if !_LIBC if (! s) s = _("Unknown system error"); #endif #if _LIBC && USE_IN_LIBIO if (_IO_fwide (stderr, 0) > 0) { __fwprintf (stderr, L": %s", s); return; } #endif fprintf (stderr, ": %s", s); } #ifdef VA_START static void error_tail (int status, int errnum, const char *message, va_list args) { # if HAVE_VPRINTF || _LIBC # if _LIBC && USE_IN_LIBIO if (_IO_fwide (stderr, 0) > 0) { # define ALLOCA_LIMIT 2000 size_t len = strlen (message) + 1; wchar_t *wmessage = NULL; mbstate_t st; size_t res; const char *tmp; do { if (len < ALLOCA_LIMIT) wmessage = (wchar_t *) alloca (len * sizeof (wchar_t)); else { if (wmessage != NULL && len / 2 < ALLOCA_LIMIT) wmessage = NULL; wmessage = (wchar_t *) realloc (wmessage, len * sizeof (wchar_t)); if (wmessage == NULL) { fputws_unlocked (L"out of memory\n", stderr); return; } } memset (&st, '\0', sizeof (st)); tmp =message; } while ((res = mbsrtowcs (wmessage, &tmp, len, &st)) == len); if (res == (size_t) -1) /* The string cannot be converted. */ wmessage = (wchar_t *) L"???"; __vfwprintf (stderr, wmessage, args); } else # endif vfprintf (stderr, message, args); # else _doprnt (message, args, stderr); # endif va_end (args); ++error_message_count; if (errnum) print_errno_message (errnum); # if _LIBC && USE_IN_LIBIO if (_IO_fwide (stderr, 0) > 0) putwc (L'\n', stderr); else # endif putc ('\n', stderr); fflush (stderr); if (status) exit (status); } #endif /* 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 fflush (stdout); #ifdef _LIBC # ifdef USE_IN_LIBIO _IO_flockfile (stderr); # else __flockfile (stderr); # endif #endif if (error_print_progname) (*error_print_progname) (); else { #if _LIBC && USE_IN_LIBIO if (_IO_fwide (stderr, 0) > 0) __fwprintf (stderr, L"%s: ", program_name); else #endif fprintf (stderr, "%s: ", program_name); } #ifdef VA_START VA_START (args, message); error_tail (status, errnum, message, args); #else fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8); ++error_message_count; if (errnum) print_errno_message (errnum); putc ('\n', stderr); fflush (stderr); if (status) exit (status); #endif #ifdef _LIBC # ifdef USE_IN_LIBIO _IO_funlockfile (stderr); # else __funlockfile (stderr); # endif #endif } /* Sometimes we want to have at most one error per line. This variable controls whether this mode is selected or not. */ int error_one_per_line; void #if defined VA_START && __STDC__ error_at_line (int status, int errnum, const char *file_name, unsigned int line_number, const char *message, ...) #else error_at_line (status, errnum, file_name, line_number, message, va_alist) int status; int errnum; const char *file_name; unsigned int line_number; char *message; va_dcl #endif { #ifdef VA_START va_list args; #endif if (error_one_per_line) { static const char *old_file_name; static unsigned int old_line_number; if (old_line_number == line_number && (file_name == old_file_name || strcmp (old_file_name, file_name) == 0)) /* Simply return and print nothing. */ return; old_file_name = file_name; old_line_number = line_number; } fflush (stdout); #ifdef _LIBC # ifdef USE_IN_LIBIO _IO_flockfile (stderr); # else __flockfile (stderr); # endif #endif if (error_print_progname) (*error_print_progname) (); else { #if _LIBC && USE_IN_LIBIO if (_IO_fwide (stderr, 0) > 0) __fwprintf (stderr, L"%s: ", program_name); else #endif fprintf (stderr, "%s:", program_name); } if (file_name != NULL) { #if _LIBC && USE_IN_LIBIO if (_IO_fwide (stderr, 0) > 0) __fwprintf (stderr, L"%s:%d: ", file_name, line_number); else #endif fprintf (stderr, "%s:%d: ", file_name, line_number); } #ifdef VA_START VA_START (args, message); error_tail (status, errnum, message, args); #else fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8); ++error_message_count; if (errnum) print_errno_message (errnum); putc ('\n', stderr); fflush (stderr); if (status) exit (status); #endif #ifdef _LIBC # ifdef USE_IN_LIBIO _IO_funlockfile (stderr); # else __funlockfile (stderr); # endif #endif } #ifdef _LIBC /* Make the weak alias. */ # undef error # undef error_at_line weak_alias (__error, error) weak_alias (__error_at_line, error_at_line) #endif