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/* libguestfs - the guestfsd daemon
* Copyright (C) 2009-2012 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <limits.h>
#include <sys/stat.h>
#include "guestfs_protocol.h"
#include "daemon.h"
#include "actions.h"
static int
input_to_nul (FILE *fp, char *buf, size_t maxlen)
{
size_t i = 0;
int c;
while (i < maxlen) {
c = fgetc (fp);
if (c == EOF)
return 0;
buf[i++] = c;
if (c == '\0')
return i;
}
reply_with_error ("input_to_nul: input string too long");
return -1;
}
char **
do_find (const char *dir)
{
struct stat statbuf;
int r;
size_t sysrootdirlen;
size_t len;
char *cmd;
FILE *fp;
DECLARE_STRINGSBUF (ret);
char *sysrootdir;
char str[PATH_MAX];
sysrootdir = sysroot_path (dir);
if (!sysrootdir) {
reply_with_perror ("malloc");
return NULL;
}
r = stat (sysrootdir, &statbuf);
if (r == -1) {
reply_with_perror ("%s", dir);
free (sysrootdir);
return NULL;
}
if (!S_ISDIR (statbuf.st_mode)) {
reply_with_error ("%s: not a directory", dir);
free (sysrootdir);
return NULL;
}
sysrootdirlen = strlen (sysrootdir);
/* Assemble the external find command. */
if (asprintf_nowarn (&cmd, "find %Q -print0", sysrootdir) == -1) {
reply_with_perror ("malloc");
free (sysrootdir);
return NULL;
}
free (sysrootdir);
if (verbose)
fprintf (stderr, "%s\n", cmd);
fp = popen (cmd, "r");
if (fp == NULL) {
reply_with_perror ("%s", cmd);
free (cmd);
return NULL;
}
free (cmd);
while ((r = input_to_nul (fp, str, PATH_MAX)) > 0) {
len = strlen (str);
if (len <= sysrootdirlen)
continue;
/* Remove the directory part of the path when adding it. */
if (add_string (&ret, str + sysrootdirlen) == -1) {
pclose (fp);
return NULL;
}
}
if (pclose (fp) != 0) {
reply_with_perror ("pclose");
free_stringslen (ret.argv, ret.size);
return NULL;
}
if (r == -1) {
free_stringslen (ret.argv, ret.size);
return NULL;
}
if (ret.size > 0)
sort_strings (ret.argv, ret.size);
if (end_stringsbuf (&ret) == -1)
return NULL;
return ret.argv; /* caller frees */
}
/* The code below assumes each path returned can fit into a protocol
* chunk. If this turns out not to be true at some point in the
* future then we'll need to modify the code a bit to handle it.
*/
#if PATH_MAX > GUESTFS_MAX_CHUNK_SIZE
#error "PATH_MAX > GUESTFS_MAX_CHUNK_SIZE"
#endif
/* Has one FileOut parameter. */
int
do_find0 (const char *dir)
{
struct stat statbuf;
int r;
FILE *fp;
char *cmd;
char *sysrootdir;
size_t sysrootdirlen, len;
char str[GUESTFS_MAX_CHUNK_SIZE];
sysrootdir = sysroot_path (dir);
if (!sysrootdir) {
reply_with_perror ("malloc");
return -1;
}
r = stat (sysrootdir, &statbuf);
if (r == -1) {
reply_with_perror ("%s", dir);
free (sysrootdir);
return -1;
}
if (!S_ISDIR (statbuf.st_mode)) {
reply_with_error ("%s: not a directory", dir);
free (sysrootdir);
return -1;
}
sysrootdirlen = strlen (sysrootdir);
if (asprintf_nowarn (&cmd, "find %Q -print0", sysrootdir) == -1) {
reply_with_perror ("asprintf");
free (sysrootdir);
return -1;
}
free (sysrootdir);
if (verbose)
fprintf (stderr, "%s\n", cmd);
fp = popen (cmd, "r");
if (fp == NULL) {
reply_with_perror ("%s", cmd);
free (cmd);
return -1;
}
free (cmd);
/* Now we must send the reply message, before the file contents. After
* this there is no opportunity in the protocol to send any error
* message back. Instead we can only cancel the transfer.
*/
reply (NULL, NULL);
while ((r = input_to_nul (fp, str, GUESTFS_MAX_CHUNK_SIZE)) > 0) {
len = strlen (str);
if (len <= sysrootdirlen)
continue;
/* Remove the directory part of the path before sending it. */
if (send_file_write (str + sysrootdirlen, r - sysrootdirlen) < 0) {
pclose (fp);
return -1;
}
}
if (ferror (fp)) {
perror (dir);
send_file_end (1); /* Cancel. */
pclose (fp);
return -1;
}
if (pclose (fp) != 0) {
perror (dir);
send_file_end (1); /* Cancel. */
return -1;
}
if (send_file_end (0)) /* Normal end of file. */
return -1;
return 0;
}
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