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      1 /*-
      2  * Copyright (c) 1998-2004 Dag-Erling Codan Smrgrav
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer
     10  *    in this position and unchanged.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the author may not be used to endorse or promote products
     15  *    derived from this software without specific prior written permission
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include "free2net.h"
     30 
     31 #include <sys/cdefs.h>
     32 __FBSDID("$FreeBSD: src/lib/libfetch/file.c,v 1.16.6.1 2006/11/11 00:16:07 des Exp $");
     33 
     34 #include <sys/param.h>
     35 #include <sys/stat.h>
     36 
     37 #include <dirent.h>
     38 #include <stdio.h>
     39 #include <string.h>
     40 
     41 #include "fetch.h"
     42 #include "common.h"
     43 
     44 FILE *
     45 fetchXGetFile(struct url *u, struct url_stat *us, const char *flags)
     46 {
     47 	FILE *f;
     48 
     49 	if (us && fetchStatFile(u, us, flags) == -1)
     50 		return (NULL);
     51 
     52 	f = fopen(u->doc, "r");
     53 
     54 	if (f == NULL)
     55 		_fetch_syserr();
     56 
     57 	if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) {
     58 		fclose(f);
     59 		_fetch_syserr();
     60 	}
     61 
     62 	return (f);
     63 }
     64 
     65 FILE *
     66 fetchGetFile(struct url *u, const char *flags)
     67 {
     68 	return (fetchXGetFile(u, NULL, flags));
     69 }
     70 
     71 FILE *
     72 fetchPutFile(struct url *u, const char *flags)
     73 {
     74 	FILE *f;
     75 
     76 	if (CHECK_FLAG('a'))
     77 		f = fopen(u->doc, "a");
     78 	else
     79 		f = fopen(u->doc, "w+");
     80 
     81 	if (f == NULL)
     82 		_fetch_syserr();
     83 
     84 	if (u->offset && fseeko(f, u->offset, SEEK_SET) == -1) {
     85 		fclose(f);
     86 		_fetch_syserr();
     87 	}
     88 
     89 	return (f);
     90 }
     91 
     92 static int
     93 _fetch_stat_file(const char *fn, struct url_stat *us)
     94 {
     95 	struct stat sb;
     96 
     97 	us->size = -1;
     98 	us->atime = us->mtime = 0;
     99 	if (stat(fn, &sb) == -1) {
    100 		_fetch_syserr();
    101 		return (-1);
    102 	}
    103 	us->size = sb.st_size;
    104 	us->atime = sb.st_atime;
    105 	us->mtime = sb.st_mtime;
    106 	return (0);
    107 }
    108 
    109 /* ARGSUSED2 */
    110 int
    111 fetchStatFile(struct url *u, struct url_stat *us, const char *flags __unused)
    112 {
    113 	return (_fetch_stat_file(u->doc, us));
    114 }
    115 
    116 /* ARGSUSED1 */
    117 struct url_ent *
    118 fetchListFile(struct url *u, const char *flags __unused)
    119 {
    120 	struct dirent *de;
    121 	struct url_stat us;
    122 	struct url_ent *ue;
    123 	int size, len;
    124 	char fn[PATH_MAX], *p;
    125 	DIR *dir;
    126 	int l;
    127 
    128 	if ((dir = opendir(u->doc)) == NULL) {
    129 		_fetch_syserr();
    130 		return (NULL);
    131 	}
    132 
    133 	ue = NULL;
    134 	strncpy(fn, u->doc, sizeof(fn) - 2);
    135 	fn[sizeof(fn) - 2] = 0;
    136 	strcat(fn, "/");
    137 	p = strchr(fn, 0);
    138 	l = sizeof(fn) - strlen(fn) - 1;
    139 
    140 	while ((de = readdir(dir)) != NULL) {
    141 		strncpy(p, de->d_name, (unsigned)(l - 1));
    142 		p[l - 1] = 0;
    143 		if (_fetch_stat_file(fn, &us) == -1)
    144 			/* should I return a partial result, or abort? */
    145 			break;
    146 		_fetch_add_entry(&ue, &size, &len, de->d_name, &us);
    147 	}
    148 
    149 	return (ue);
    150 }
    151