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/* libguestfs - the guestfsd daemon
* Copyright (C) 2009-2016 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"
GUESTFSD_EXT_CMD(str_find, find);
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;
}
/* Has one FileOut parameter. */
int
do_find0 (const char *dir)
{
struct stat statbuf;
int r;
FILE *fp;
CLEANUP_FREE char *cmd = NULL;
CLEANUP_FREE char *sysrootdir = NULL;
size_t sysrootdirlen;
CLEANUP_FREE char *str = NULL;
str = malloc (GUESTFS_MAX_CHUNK_SIZE);
if (str == NULL) {
reply_with_perror ("malloc");
return -1;
}
sysrootdir = sysroot_path (dir);
if (!sysrootdir) {
reply_with_perror ("malloc");
return -1;
}
r = stat (sysrootdir, &statbuf);
if (r == -1) {
reply_with_perror ("%s", dir);
return -1;
}
if (!S_ISDIR (statbuf.st_mode)) {
reply_with_error ("%s: not a directory", dir);
return -1;
}
sysrootdirlen = strlen (sysrootdir);
if (asprintf_nowarn (&cmd, "%s %Q -print0", str_find, sysrootdir) == -1) {
reply_with_perror ("asprintf");
return -1;
}
if (verbose)
fprintf (stderr, "%s\n", cmd);
fp = popen (cmd, "r");
if (fp == NULL) {
reply_with_perror ("%s", cmd);
return -1;
}
/* 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);
/* The code below assumes each path returned can fit into a protocol
* chunk (if not you'll get a runtime protocol error). If this
* turns out not to be a problem at some point in the future then
* we'll need to modify the code to handle it. XXX
*/
while ((r = input_to_nul (fp, str, GUESTFS_MAX_CHUNK_SIZE)) > 0) {
const size_t 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)) {
fprintf (stderr, "fgetc: %s: %m\n", dir);
send_file_end (1); /* Cancel. */
pclose (fp);
return -1;
}
if (pclose (fp) != 0) {
fprintf (stderr, "pclose: %s: %m\n", 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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