511 lines
11 KiB
C
511 lines
11 KiB
C
/* $Vendor-Id: catman.c,v 1.10 2012/01/03 15:17:20 kristaps Exp $ */
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/*
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* Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <assert.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#ifdef __linux__
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# include <db_185.h>
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#else
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# include <db.h>
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#endif
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#include "manpath.h"
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#include "mandocdb.h"
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#define xstrlcpy(_dst, _src, _sz) \
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do if (strlcpy((_dst), (_src), (_sz)) >= (_sz)) { \
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fprintf(stderr, "%s: Path too long", (_dst)); \
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exit(EXIT_FAILURE); \
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} while (/* CONSTCOND */0)
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#define xstrlcat(_dst, _src, _sz) \
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do if (strlcat((_dst), (_src), (_sz)) >= (_sz)) { \
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fprintf(stderr, "%s: Path too long", (_dst)); \
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exit(EXIT_FAILURE); \
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} while (/* CONSTCOND */0)
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static int indexhtml(char *, size_t, char *, size_t);
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static int manup(const struct manpaths *, char *);
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static int mkpath(char *, mode_t, mode_t);
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static int treecpy(char *, char *);
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static int update(char *, char *);
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static void usage(void);
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static const char *progname;
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static int verbose;
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static int force;
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int
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main(int argc, char *argv[])
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{
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int ch;
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char *aux, *base, *conf_file;
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struct manpaths dirs;
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char buf[MAXPATHLEN];
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extern char *optarg;
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extern int optind;
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progname = strrchr(argv[0], '/');
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if (progname == NULL)
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progname = argv[0];
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else
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++progname;
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aux = base = conf_file = NULL;
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xstrlcpy(buf, "/var/www/cache/man.cgi", MAXPATHLEN);
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while (-1 != (ch = getopt(argc, argv, "C:fm:M:o:v")))
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switch (ch) {
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case ('C'):
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conf_file = optarg;
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break;
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case ('f'):
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force = 1;
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break;
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case ('m'):
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aux = optarg;
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break;
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case ('M'):
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base = optarg;
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break;
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case ('o'):
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xstrlcpy(buf, optarg, MAXPATHLEN);
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break;
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case ('v'):
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verbose++;
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break;
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default:
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usage();
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return(EXIT_FAILURE);
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}
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argc -= optind;
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argv += optind;
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if (argc > 0) {
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usage();
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return(EXIT_FAILURE);
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}
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memset(&dirs, 0, sizeof(struct manpaths));
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manpath_parse(&dirs, conf_file, base, aux);
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ch = manup(&dirs, buf);
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manpath_free(&dirs);
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return(ch ? EXIT_SUCCESS : EXIT_FAILURE);
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: %s "
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"[-fv] "
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"[-C file] "
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"[-o path] "
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"[-m manpath] "
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"[-M manpath]\n",
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progname);
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}
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/*
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* If "src" file doesn't exist (errors out), return -1. Otherwise,
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* return 1 if "src" is newer (which also happens "dst" doesn't exist)
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* and 0 otherwise.
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*/
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static int
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isnewer(const char *dst, const char *src)
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{
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struct stat s1, s2;
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if (-1 == stat(src, &s1))
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return(-1);
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if (force)
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return(1);
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return(-1 == stat(dst, &s2) ? 1 : s1.st_mtime > s2.st_mtime);
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}
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/*
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* Copy the contents of one file into another.
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* Returns 0 on failure, 1 on success.
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*/
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static int
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filecpy(const char *dst, const char *src)
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{
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char buf[BUFSIZ];
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int sfd, dfd, rc;
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ssize_t rsz, wsz;
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sfd = dfd = -1;
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rc = 0;
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if (-1 == (dfd = open(dst, O_CREAT|O_TRUNC|O_WRONLY, 0644))) {
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perror(dst);
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goto out;
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} else if (-1 == (sfd = open(src, O_RDONLY, 0))) {
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perror(src);
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goto out;
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}
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while ((rsz = read(sfd, buf, BUFSIZ)) > 0)
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if (-1 == (wsz = write(dfd, buf, (size_t)rsz))) {
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perror(dst);
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goto out;
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} else if (wsz < rsz) {
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fprintf(stderr, "%s: Short write\n", dst);
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goto out;
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}
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if (rsz < 0)
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perror(src);
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else
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rc = 1;
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out:
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if (-1 != sfd)
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close(sfd);
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if (-1 != dfd)
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close(dfd);
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return(rc);
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}
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/*
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* Pass over the recno database and re-create HTML pages if they're
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* found to be out of date.
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* Returns -1 on fatal error, 1 on success.
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*/
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static int
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indexhtml(char *src, size_t ssz, char *dst, size_t dsz)
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{
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DB *idx;
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DBT key, val;
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int c, rc;
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unsigned int fl;
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const char *f;
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char *d;
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char fname[MAXPATHLEN];
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pid_t pid;
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pid = -1;
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xstrlcpy(fname, dst, MAXPATHLEN);
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xstrlcat(fname, "/", MAXPATHLEN);
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xstrlcat(fname, MANDOC_IDX, MAXPATHLEN);
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idx = dbopen(fname, O_RDONLY, 0, DB_RECNO, NULL);
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if (NULL == idx) {
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perror(fname);
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return(-1);
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}
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fl = R_FIRST;
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while (0 == (c = (*idx->seq)(idx, &key, &val, fl))) {
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fl = R_NEXT;
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/*
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* If the record is zero-length, then it's unassigned.
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* Skip past these.
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*/
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if (0 == val.size)
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continue;
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f = (const char *)val.data + 1;
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if (NULL == memchr(f, '\0', val.size - 1))
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break;
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src[(int)ssz] = dst[(int)dsz] = '\0';
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xstrlcat(dst, "/", MAXPATHLEN);
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xstrlcat(dst, f, MAXPATHLEN);
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xstrlcat(src, "/", MAXPATHLEN);
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xstrlcat(src, f, MAXPATHLEN);
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if (-1 == (rc = isnewer(dst, src))) {
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fprintf(stderr, "%s: File missing\n", f);
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break;
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} else if (0 == rc)
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continue;
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d = strrchr(dst, '/');
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assert(NULL != d);
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*d = '\0';
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if (-1 == mkpath(dst, 0755, 0755)) {
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perror(dst);
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break;
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}
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*d = '/';
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if ( ! filecpy(dst, src))
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break;
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if (verbose)
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printf("%s\n", dst);
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}
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(*idx->close)(idx);
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if (c < 0)
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perror(fname);
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else if (0 == c)
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fprintf(stderr, "%s: Corrupt index\n", fname);
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return(1 == c ? 1 : -1);
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}
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/*
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* Copy both recno and btree databases into the destination.
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* Call in to begin recreating HTML files.
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* Return -1 on fatal error and 1 if the update went well.
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*/
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static int
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update(char *dst, char *src)
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{
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size_t dsz, ssz;
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dsz = strlen(dst);
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ssz = strlen(src);
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xstrlcat(src, "/", MAXPATHLEN);
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xstrlcat(dst, "/", MAXPATHLEN);
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xstrlcat(src, MANDOC_DB, MAXPATHLEN);
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xstrlcat(dst, MANDOC_DB, MAXPATHLEN);
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if ( ! filecpy(dst, src))
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return(-1);
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if (verbose)
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printf("%s\n", dst);
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dst[(int)dsz] = src[(int)ssz] = '\0';
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xstrlcat(src, "/", MAXPATHLEN);
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xstrlcat(dst, "/", MAXPATHLEN);
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xstrlcat(src, MANDOC_IDX, MAXPATHLEN);
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xstrlcat(dst, MANDOC_IDX, MAXPATHLEN);
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if ( ! filecpy(dst, src))
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return(-1);
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if (verbose)
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printf("%s\n", dst);
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dst[(int)dsz] = src[(int)ssz] = '\0';
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return(indexhtml(src, ssz, dst, dsz));
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}
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/*
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* See if btree or recno databases in the destination are out of date
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* with respect to a single manpath component.
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* Return -1 on fatal error, 0 if the source is no longer valid (and
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* shouldn't be listed), and 1 if the update went well.
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*/
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static int
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treecpy(char *dst, char *src)
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{
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size_t dsz, ssz;
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int rc;
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dsz = strlen(dst);
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ssz = strlen(src);
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xstrlcat(src, "/", MAXPATHLEN);
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xstrlcat(dst, "/", MAXPATHLEN);
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xstrlcat(src, MANDOC_IDX, MAXPATHLEN);
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xstrlcat(dst, MANDOC_IDX, MAXPATHLEN);
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if (-1 == (rc = isnewer(dst, src)))
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return(0);
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dst[(int)dsz] = src[(int)ssz] = '\0';
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if (1 == rc)
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return(update(dst, src));
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xstrlcat(src, "/", MAXPATHLEN);
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xstrlcat(dst, "/", MAXPATHLEN);
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xstrlcat(src, MANDOC_DB, MAXPATHLEN);
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xstrlcat(dst, MANDOC_DB, MAXPATHLEN);
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if (-1 == (rc = isnewer(dst, src)))
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return(0);
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else if (rc == 0)
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return(1);
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dst[(int)dsz] = src[(int)ssz] = '\0';
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return(update(dst, src));
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}
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/*
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* Update the destination's file-tree with respect to changes in the
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* source manpath components.
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* "Change" is defined by an updated index or btree database.
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* Returns 1 on success, 0 on failure.
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*/
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static int
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manup(const struct manpaths *dirs, char *base)
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{
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char dst[MAXPATHLEN],
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src[MAXPATHLEN];
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const char *path;
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int i, c;
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size_t sz;
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FILE *f;
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/* Create the path and file for the catman.conf file. */
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sz = strlen(base);
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xstrlcpy(dst, base, MAXPATHLEN);
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xstrlcat(dst, "/etc", MAXPATHLEN);
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if (-1 == mkpath(dst, 0755, 0755)) {
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perror(dst);
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return(0);
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}
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xstrlcat(dst, "/catman.conf", MAXPATHLEN);
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if (NULL == (f = fopen(dst, "w"))) {
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perror(dst);
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return(0);
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} else if (verbose)
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printf("%s\n", dst);
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for (i = 0; i < dirs->sz; i++) {
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path = dirs->paths[i];
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dst[(int)sz] = '\0';
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xstrlcat(dst, path, MAXPATHLEN);
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if (-1 == mkpath(dst, 0755, 0755)) {
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perror(dst);
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break;
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}
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xstrlcpy(src, path, MAXPATHLEN);
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if (-1 == (c = treecpy(dst, src)))
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break;
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else if (0 == c)
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continue;
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/*
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* We want to use a relative path here because manpath.h
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* will realpath() when invoked with man.cgi, and we'll
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* make sure to chdir() into the cache directory before.
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*
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* This allows the cache directory to be in an arbitrary
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* place, working in both chroot() and non-chroot()
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* "safe" modes.
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*/
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assert('/' == path[0]);
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fprintf(f, "_whatdb %s/whatis.db\n", path + 1);
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}
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fclose(f);
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return(i == dirs->sz);
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}
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/*
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* Copyright (c) 1983, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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static int
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mkpath(char *path, mode_t mode, mode_t dir_mode)
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{
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struct stat sb;
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char *slash;
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int done, exists;
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slash = path;
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for (;;) {
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/* LINTED */
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slash += strspn(slash, "/");
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/* LINTED */
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slash += strcspn(slash, "/");
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done = (*slash == '\0');
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*slash = '\0';
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/* skip existing path components */
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exists = !stat(path, &sb);
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if (!done && exists && S_ISDIR(sb.st_mode)) {
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*slash = '/';
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continue;
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}
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if (mkdir(path, done ? mode : dir_mode) == 0) {
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if (mode > 0777 && chmod(path, mode) < 0)
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return (-1);
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} else {
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if (!exists) {
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/* Not there */
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return (-1);
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}
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if (!S_ISDIR(sb.st_mode)) {
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/* Is there, but isn't a directory */
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errno = ENOTDIR;
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return (-1);
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}
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}
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if (done)
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break;
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*slash = '/';
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}
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return (0);
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}
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