BSD 4_4 release

[unix-history] / usr / src / usr.bin / man / config.c

/*
* Copyright (c) 1989, 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 sccsid[] = "@(#)config.c    8.1 (Berkeley) 6/17/93";
#endif /* not lint */

#include <sys/param.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <pwd.h>
#include "pathnames.h"

#define MAXLINE         1024

extern char *progname;
char *pathbuf, **arorder;

static FILE *cfp;

/*
* getpath --
*      read in the configuration file, calling a function with the line
*      from each matching section.
*/
char *
getpath(sects)
       char **sects;
{
       register char **av, *p;
       size_t len;
       char line[MAXLINE];
       static int openconfig();

       openconfig();
       while (fgets(line, sizeof(line), cfp)) {
               if (!strchr(line, '\n')) {
                       (void)fprintf(stderr, "%s: config line too long.\n",
                           progname);
                       exit(1);
               }
               p = strtok(line, " \t\n");
               if (!p || *p == '#')
                       continue;
               for (av = sects; *av; ++av)
                       if (!strcmp(p, *av))
                               break;
               if (!*av)
                       continue;
               while (p = strtok((char *)NULL, " \t\n")) {
                       len = strlen(p);
                       if (p[len - 1] == '/')
                               for (av = arorder; *av; ++av)
                                       cadd(p, len, *av);
                       else
                               cadd(p, len, (char *)NULL);
               }
       }
       return(pathbuf);
}

cadd(add1, len1, add2)
       char *add1, *add2;
       register size_t len1;
{
       static size_t buflen, boff;
       static char *bp, *endp;
       register size_t len2;

       len2 = add2 ? strlen(add2) : 0;
       if (bp == NULL || bp + len1 + len2 + 2 >= endp) {
               buflen += MAX(len1 + len2 + 2, 1024);
               boff = bp ? bp - pathbuf : 0;
               if ((pathbuf = realloc(pathbuf, buflen)) == NULL)
                       enomem();
               bp = pathbuf + boff;
               endp = pathbuf + buflen;
       }
       bcopy(add1, bp, len1);
       bp += len1;
       if (len2) {
               bcopy(add2, bp, len2);
               bp += len2;
       }
       *bp++ = ':';
       *bp = '\0';
}

static
openconfig()
{
       if (cfp) {
               rewind(cfp);
               return;
       }
       if (!(cfp = fopen(_PATH_MANCONF, "r"))) {
               (void)fprintf(stderr, "%s: no configuration file %s.\n",
                   progname, _PATH_MANCONF);
               exit(1);
       }
}

char **
getdb()
{
       register char *p;
       int cnt, num;
       char **ar, line[MAXLINE];

       ar = NULL;
       num = 0;
       cnt = -1;
       openconfig();
       while (fgets(line, sizeof(line), cfp)) {
               if (!strchr(line, '\n')) {
                       (void)fprintf(stderr, "%s: config line too long.\n",
                           progname);
                       exit(1);
               }
               p = strtok(line, " \t\n");
#define WHATDB  "_whatdb"
               if (!p || *p == '#' || strcmp(p, WHATDB))
                       continue;
               while (p = strtok((char *)NULL, " \t\n")) {
                       if (cnt == num - 1 &&
                           !(ar = realloc(ar, (num += 30) * sizeof(char **))))
                               enomem();
                       if (!(ar[++cnt] = strdup(p)))
                               enomem();
               }
       }
       if (ar) {
               if (cnt == num - 1 &&
                   !(ar = realloc(ar, ++num * sizeof(char **))))
                       enomem();
               ar[++cnt] = NULL;
       }
       return(ar);
}

char **
getorder()
{
       register char *p;
       int cnt, num;
       char **ar, line[MAXLINE];

       ar = NULL;
       num = 0;
       cnt = -1;
       openconfig();
       while (fgets(line, sizeof(line), cfp)) {
               if (!strchr(line, '\n')) {
                       (void)fprintf(stderr, "%s: config line too long.\n",
                           progname);
                       exit(1);
               }
               p = strtok(line, " \t\n");
#define SUBDIR  "_subdir"
               if (!p || *p == '#' || strcmp(p, SUBDIR))
                       continue;
               while (p = strtok((char *)NULL, " \t\n")) {
                       if (cnt == num - 1 &&
                           !(ar = realloc(ar, (num += 30) * sizeof(char **))))
                               enomem();
                       if (!(ar[++cnt] = strdup(p)))
                               enomem();
               }
       }
       if (ar) {
               if (cnt == num - 1 &&
                   !(ar = realloc(ar, ++num * sizeof(char **))))
                       enomem();
               ar[++cnt] = NULL;
       }
       return(ar);
}

getsection(sect)
       char *sect;
{
       register char *p;
       char line[MAXLINE];

       openconfig();
       while (fgets(line, sizeof(line), cfp)) {
               if (!strchr(line, '\n')) {
                       (void)fprintf(stderr, "%s: config line too long.\n",
                           progname);
                       exit(1);
               }
               p = strtok(line, " \t\n");
               if (!p || *p == '#')
                       continue;
               if (!strcmp(p, sect))
                       return(1);
       }
       return(0);
}

enomem()
{
       (void)fprintf(stderr, "%s: %s\n", progname, strerror(ENOMEM));
       exit(1);
}