sftp-glob.c

   1 /* $OpenBSD: sftp-glob.c,v 1.22 2006/08/03 03:34:42 deraadt Exp $ */
   2 /*
   3  * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include "includes.h"
  19
  20 #include <sys/types.h>
  21 #ifdef HAVE_SYS_STAT_H
  22 # include <sys/stat.h>
  23 #endif
  24
  25 #include <dirent.h>
  26 #include <string.h>
  27
  28 #include "xmalloc.h"
  29 #include "sftp.h"
  30 #include "buffer.h"
  31 #include "sftp-common.h"
  32 #include "sftp-client.h"
  33
  34 int remote_glob(struct sftp_conn *, const char *, int,
  35     int (*)(const char *, int), glob_t *);
  36
  37 struct SFTP_OPENDIR {
  38         SFTP_DIRENT **dir;
  39         int offset;
  40 };
  41
  42 static struct {
  43         struct sftp_conn *conn;
  44 } cur;
  45
  46 static void *
  47 fudge_opendir(const char *path)
  48 {
  49         struct SFTP_OPENDIR *r;
  50
  51         r = xmalloc(sizeof(*r));
  52
  53         if (do_readdir(cur.conn, (char *)path, &r->dir)) {
  54                 xfree(r);
  55                 return(NULL);
  56         }
  57
  58         r->offset = 0;
  59
  60         return((void *)r);
  61 }
  62
  63 static struct dirent *
  64 fudge_readdir(struct SFTP_OPENDIR *od)
  65 {
  66         /* Solaris needs sizeof(dirent) + path length (see below) */
  67         static char buf[sizeof(struct dirent) + MAXPATHLEN];
  68         struct dirent *ret = (struct dirent *)buf;
  69 #ifdef __GNU_LIBRARY__
  70         static int inum = 1;
  71 #endif /* __GNU_LIBRARY__ */
  72
  73         if (od->dir[od->offset] == NULL)
  74                 return(NULL);
  75
  76         memset(buf, 0, sizeof(buf));
  77
  78         /*
  79          * Solaris defines dirent->d_name as a one byte array and expects
  80          * you to hack around it.
  81          */
  82 #ifdef BROKEN_ONE_BYTE_DIRENT_D_NAME
  83         strlcpy(ret->d_name, od->dir[od->offset++]->filename, MAXPATHLEN);
  84 #else
  85         strlcpy(ret->d_name, od->dir[od->offset++]->filename,
  86             sizeof(ret->d_name));
  87 #endif
  88 #ifdef __GNU_LIBRARY__
  89         /*
  90          * Idiot glibc uses extensions to struct dirent for readdir with
  91          * ALTDIRFUNCs. Not that this is documented anywhere but the
  92          * source... Fake an inode number to appease it.
  93          */
  94         ret->d_ino = inum++;
  95         if (!inum)
  96                 inum = 1;
  97 #endif /* __GNU_LIBRARY__ */
  98
  99         return(ret);
 100 }
 101
 102 static void
 103 fudge_closedir(struct SFTP_OPENDIR *od)
 104 {
 105         free_sftp_dirents(od->dir);
 106         xfree(od);
 107 }
 108
 109 static int
 110 fudge_lstat(const char *path, struct stat *st)
 111 {
 112         Attrib *a;
 113
 114         if (!(a = do_lstat(cur.conn, (char *)path, 0)))
 115                 return(-1);
 116
 117         attrib_to_stat(a, st);
 118
 119         return(0);
 120 }
 121
 122 static int
 123 fudge_stat(const char *path, struct stat *st)
 124 {
 125         Attrib *a;
 126
 127         if (!(a = do_stat(cur.conn, (char *)path, 0)))
 128                 return(-1);
 129
 130         attrib_to_stat(a, st);
 131
 132         return(0);
 133 }
 134
 135 int
 136 remote_glob(struct sftp_conn *conn, const char *pattern, int flags,
 137     int (*errfunc)(const char *, int), glob_t *pglob)
 138 {
 139         pglob->gl_opendir = fudge_opendir;
 140         pglob->gl_readdir = (struct dirent *(*)(void *))fudge_readdir;
 141         pglob->gl_closedir = (void (*)(void *))fudge_closedir;
 142         pglob->gl_lstat = fudge_lstat;
 143         pglob->gl_stat = fudge_stat;
 144
 145         memset(&cur, 0, sizeof(cur));
 146         cur.conn = conn;
 147
 148         return(glob(pattern, flags | GLOB_ALTDIRFUNC, errfunc, pglob));
 149 }