view lib/strerror.c @ 7581:45c727466eb8

Move stat.h-substitute stuff from lib/stat-macros.h to lib/stat_.h. stat-macros.h is now for our own macros, whereas stat_h is for macros in the <sys/stat.h> name space. * lib/stat-macros.h: Remove copyright notice, as this file is now tiny. (STAT_MACROS_H): Remove. (S_IFMT, S_ISBLK, S_ISCHR, S_ISDIR, S_ISFIFO, S_ISLNK, S_ISNAM): (S_ISMPB, S_ISMPC, S_ISNWK, S_ISREG, S_ISSOCK, S_ISDOOR, S_ISPORT): (S_TYPEISMQ, S_TYPEISTMO, S_TYPEISSEM, S_TYPEISSHM, S_ISCTG, S_ISOFD): (S_ISOFL, S_ISWHT, S_ISUID, S_ISGID, S_ISVTX, S_IRUSR, S_IRGRP): (S_IROTH, S_IWUSR, S_IWGRP, S_IWOTH, S_IXUSR, S_IXGRP, S_IXOTH): (S_IRWXU, S_IRWXG, S_IRWXO, S_IXUGO, S_IRWXUGO): Move these macros to ... * lib/stat_.h: here. Don't include stat-macros.h. * lib/canonicalize.c: Don't include stat-macros.h. * lib/chown.c: Likewise. * lib/euidaccess.c: Likewise. * lib/file-type.c: Likewise. * lib/filemode.c: Likewise. * lib/glob.c: Likewise. * lib/isapipe.c: Likewise. * lib/lchown.c: Likewise. * lib/lstat.c: Likewise. * lib/mkdir-p.c: Likewise. * lib/rmdir.c: Likewise. * m4/lchown.m4 (gl_FUNC_LCHOWN): Don't require gl_STAT_MACROS. * m4/sys_stat_h.m4 (gl_HEADER_SYS_STAT_H): Don't check for io.h unless mkdir isn't declared, to speed up 'configure'. Always create sys/stat.h, since it's unlikely any real sys/stat.h would define all the S_* symbols. * modules/canonicalize (Depends-on): Depend on sys_stat, not stat-macros. * modules/chown: Likewise. * modules/euidaccess: Likewise. * modules/filemode: Likewise. * modules/file-type: Likewise. * modules/glob: Likewise. * modules/isapipe: Likewise. * modules/lchown: Likewise. * modules/lstat: Likewise. * modules/mkancesdirs: Likewise. * modules/rmdir: Likewise. * modules/mkdir-p (Depends-on): Also depend on sys_stat. * modules/modechange: Likewise. * modules/stat-macros (Files): Remove m4/stat-macros.m4. (configure.ac): Remove gl_STAT_MACROS. * modules/sys_stat (Depends-on): Remove stat-macros.
author Paul Eggert <eggert@cs.ucla.edu>
date Fri, 27 Oct 2006 20:46:43 +0000
parents 8a1a9361108c
children e5ee9891c553
line wrap: on
line source

/* strerror.c --- ANSI C compatible system error routine

   Copyright (C) 1986, 1988, 1989, 1991, 2002, 2003, 2006 Free
   Software Foundation, Inc.

   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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

#include <config.h>

#include <limits.h>

/* Don't include <stdio.h>, since it may or may not declare
   sys_errlist and its declarations may collide with ours.  Just
   declare the stuff that we need directly.  Standard hosted C89
   implementations define strerror and they don't need this strerror
   function, so take some liberties with the standard to cater to
   ancient or limited freestanding implementations.  */
int sprintf (char *, char const *, ...);
extern int sys_nerr;
extern char *sys_errlist[];

char *
strerror (int n)
{
  static char const fmt[] = "Unknown error (%d)";
  static char mesg[sizeof fmt + sizeof n * CHAR_BIT / 3];

  if (n < 0 || n >= sys_nerr)
    {
      sprintf (mesg, fmt, n);
      return mesg;
    }
  else
    return sys_errlist[n];
}