try to make sure that path-addrs always have <angle brackets>

[unix-history] / usr / src / usr.sbin / sysctl / pathconf.c

/*
* Copyright (c) 1993
*      The Regents of the University of California.  All rights reserved.
*
* %sccs.include.redist.c%
*/

#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
static char sccsid[] = "@(#)pathconf.c  8.1 (Berkeley) %G%";
#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")) != EOF) {
               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);
}