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/* $NetBSD: pathconf.c,v 1.2 1995/09/30 07:12:47 thorpej Exp $ */
/*
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)pathconf.c 8.1 (Berkeley) 6/6/93";
#else
static char rcsid[] = "$NetBSD: pathconf.c,v 1.2 1995/09/30 07:12:47 thorpej Exp $";
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/unistd.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define PC_NAMES { \
{ 0, 0 }, \
{ "link_max", CTLTYPE_INT }, \
{ "max_canon", CTLTYPE_INT }, \
{ "max_input", CTLTYPE_INT }, \
{ "name_max", CTLTYPE_INT }, \
{ "path_max", CTLTYPE_INT }, \
{ "pipe_buf", CTLTYPE_INT }, \
{ "chown_restricted", CTLTYPE_INT }, \
{ "no_trunc", CTLTYPE_INT }, \
{ "vdisable", CTLTYPE_INT }, \
}
#define PC_MAXID 10
struct ctlname pcnames[] = PC_NAMES;
char names[BUFSIZ];
struct list {
struct ctlname *list;
int size;
};
struct list pclist = { pcnames, PC_MAXID };
int Aflag, aflag, nflag, wflag, stdinflag;
int
main(argc, argv)
int argc;
char *argv[];
{
extern char *optarg;
extern int optind;
char *path;
int ch;
while ((ch = getopt(argc, argv, "Aan")) != -1) {
switch (ch) {
case 'A':
Aflag = 1;
break;
case 'a':
aflag = 1;
break;
case 'n':
nflag = 1;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc == 0)
usage();
path = *argv++;
if (strcmp(path, "-") == 0)
stdinflag = 1;
argc--;
if (Aflag || aflag) {
listall(path, &pclist);
exit(0);
}
if (argc == 0)
usage();
while (argc-- > 0)
parse(path, *argv, 1);
exit(0);
}
/*
* List all variables known to the system.
*/
listall(path, lp)
char *path;
struct list *lp;
{
int lvl2;
if (lp->list == 0)
return;
for (lvl2 = 0; lvl2 < lp->size; lvl2++) {
if (lp->list[lvl2].ctl_name == 0)
continue;
parse(path, lp->list[lvl2].ctl_name, Aflag);
}
}
/*
* Parse a name into an index.
* Lookup and print out the attribute if it exists.
*/
parse(pathname, string, flags)
char *pathname;
char *string;
int flags;
{
int indx, value;
char *bufp, buf[BUFSIZ];
bufp = buf;
snprintf(buf, BUFSIZ, "%s", string);
if ((indx = findname(string, "top", &bufp, &pclist)) == -1)
return;
if (bufp) {
fprintf(stderr, "name %s in %s is unknown\n", *bufp, string);
return;
}
if (stdinflag)
value = fpathconf(0, indx);
else
value = pathconf(pathname, indx);
if (value == -1) {
if (flags == 0)
return;
switch (errno) {
case EOPNOTSUPP:
fprintf(stderr, "%s: value is not available\n", string);
return;
case ENOTDIR:
fprintf(stderr, "%s: specification is incomplete\n",
string);
return;
case ENOMEM:
fprintf(stderr, "%s: type is unknown to this program\n",
string);
return;
default:
perror(string);
return;
}
}
if (!nflag)
fprintf(stdout, "%s = ", string);
fprintf(stdout, "%d\n", value);
}
/*
* Scan a list of names searching for a particular name.
*/
findname(string, level, bufp, namelist)
char *string;
char *level;
char **bufp;
struct list *namelist;
{
char *name;
int i;
if (namelist->list == 0 || (name = strsep(bufp, ".")) == NULL) {
fprintf(stderr, "%s: incomplete specification\n", string);
return (-1);
}
for (i = 0; i < namelist->size; i++)
if (namelist->list[i].ctl_name != NULL &&
strcmp(name, namelist->list[i].ctl_name) == 0)
break;
if (i == namelist->size) {
fprintf(stderr, "%s level name %s in %s is invalid\n",
level, name, string);
return (-1);
}
return (i);
}
usage()
{
(void)fprintf(stderr, "usage:\t%s\n\t%s\n\t%s\n",
"pathname [-n] variable ...",
"pathname [-n] -a", "pathname [-n] -A");
exit(1);
}
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