109 lines
2.5 KiB
C
109 lines
2.5 KiB
C
/* gawkmisc.c --- miscellanious gawk routines that are OS specific.
|
|
|
|
Copyright (C) 1986, 1988, 1989, 1991 - 96 the 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
char quote = '\'';
|
|
char *defpath = DEFPATH;
|
|
char envsep = ':';
|
|
|
|
/* gawk_name --- pull out the "gawk" part from how the OS called us */
|
|
|
|
char *
|
|
gawk_name(filespec)
|
|
const char *filespec;
|
|
{
|
|
char *p;
|
|
|
|
/* "path/name" -> "name" */
|
|
p = strrchr(filespec, '/');
|
|
return (p == NULL ? (char *) filespec : p + 1);
|
|
}
|
|
|
|
/* os_arg_fixup --- fixup the command line */
|
|
|
|
void
|
|
os_arg_fixup(argcp, argvp)
|
|
int *argcp;
|
|
char ***argvp;
|
|
{
|
|
/* no-op */
|
|
return;
|
|
}
|
|
|
|
/* os_devopen --- open special per-OS devices */
|
|
|
|
int
|
|
os_devopen(name, flag)
|
|
const char *name;
|
|
int flag;
|
|
{
|
|
/* no-op */
|
|
return INVALID_HANDLE;
|
|
}
|
|
|
|
/* optimal_bufsize --- determine optimal buffer size */
|
|
|
|
int
|
|
optimal_bufsize(fd, stb)
|
|
int fd;
|
|
struct stat *stb;
|
|
{
|
|
/* force all members to zero in case OS doesn't use all of them. */
|
|
memset(stb, '\0', sizeof(struct stat));
|
|
|
|
/*
|
|
* System V.n, n < 4, doesn't have the file system block size in the
|
|
* stat structure. So we have to make some sort of reasonable
|
|
* guess. We use stdio's BUFSIZ, since that is what it was
|
|
* meant for in the first place.
|
|
*/
|
|
#ifdef HAVE_ST_BLKSIZE
|
|
#define DEFBLKSIZE (stb->st_blksize ? stb->st_blksize : BUFSIZ)
|
|
#else
|
|
#define DEFBLKSIZE BUFSIZ
|
|
#endif
|
|
|
|
if (isatty(fd))
|
|
return BUFSIZ;
|
|
if (fstat(fd, stb) == -1)
|
|
fatal("can't stat fd %d (%s)", fd, strerror(errno));
|
|
if (lseek(fd, (off_t)0, 0) == -1) /* not a regular file */
|
|
return DEFBLKSIZE;
|
|
if (stb->st_size > 0 && stb->st_size < DEFBLKSIZE) /* small file */
|
|
return stb->st_size;
|
|
return DEFBLKSIZE;
|
|
}
|
|
|
|
/* ispath --- return true if path has directory components */
|
|
|
|
int
|
|
ispath(file)
|
|
const char *file;
|
|
{
|
|
return (strchr(file, '/') != NULL);
|
|
}
|
|
|
|
/* isdirpunct --- return true if char is a directory separator */
|
|
|
|
int
|
|
isdirpunct(c)
|
|
int c;
|
|
{
|
|
return (c == '/');
|
|
}
|
|
|