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/* readable.c: check if a filename is a readable regular file.
Copyright (C) 1993 Karl Berry.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <kpathsea/config.h>
#include <kpathsea/c-stat.h>
#include <kpathsea/readable.h>
#include <kpathsea/truncate.h>
/* If access can read FN, run stat (assigning to stat buffer ST) and
check that fn is a regular file. */
#define READABLE(fn, st) \
(access (fn, R_OK) == 0 && stat (fn, &(st)) == 0 && S_ISREG (st.st_mode))
/* POSIX invented the brain-damage of not necessarily truncating
filename components; the system's behavior is defined by the value of
the symbol _POSIX_NO_TRUNC, but you can't change it dynamically!
Generic const return warning. See extend-fname.c. */
string
kpse_readable_file P1C(const_string, name)
{
struct stat st;
string ret;
if (READABLE (name, st))
ret = (string) name;
#ifdef ENAMETOOLONG
else if (errno == ENAMETOOLONG)
{
ret = kpse_truncate_filename (name);
/* Perhaps some other error will occur with the truncated name, so
let's call access again. */
if (!READABLE (ret, st))
{ /* Failed. */
if (ret != name) free (ret);
ret = NULL;
}
}
#endif
else /* Some other error. */
{
if (errno == EACCES) /* Warn them if permissions are bad. */
perror (name);
ret = NULL;
}
return ret;
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.