mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-22 07:03:38 +00:00
55bf7de97c
Run the following command over the source: perl -pi.bak -e 's/(20[01][0-9])-2016/$1-2017/g' `git ls-files` (Thanks Rich for the perl snippet, as used in past years.)
145 lines
3.5 KiB
C
145 lines
3.5 KiB
C
/* libguestfs - the guestfsd daemon
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* Copyright (C) 2009-2017 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <config.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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#include <fcntl.h>
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#include <limits.h>
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#include <sys/stat.h>
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#include "guestfs_protocol.h"
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#include "daemon.h"
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#include "actions.h"
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GUESTFSD_EXT_CMD(str_find, find);
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static int
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input_to_nul (FILE *fp, char *buf, size_t maxlen)
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{
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size_t i = 0;
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int c;
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while (i < maxlen) {
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c = fgetc (fp);
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if (c == EOF)
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return 0;
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buf[i++] = c;
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if (c == '\0')
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return i;
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}
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reply_with_error ("input_to_nul: input string too long");
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return -1;
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}
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/* Has one FileOut parameter. */
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int
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do_find0 (const char *dir)
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{
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struct stat statbuf;
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int r;
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FILE *fp;
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CLEANUP_FREE char *cmd = NULL;
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CLEANUP_FREE char *sysrootdir = NULL;
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size_t sysrootdirlen;
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CLEANUP_FREE char *str = NULL;
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str = malloc (GUESTFS_MAX_CHUNK_SIZE);
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if (str == NULL) {
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reply_with_perror ("malloc");
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return -1;
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}
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sysrootdir = sysroot_path (dir);
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if (!sysrootdir) {
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reply_with_perror ("malloc");
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return -1;
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}
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r = stat (sysrootdir, &statbuf);
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if (r == -1) {
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reply_with_perror ("%s", dir);
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return -1;
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}
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if (!S_ISDIR (statbuf.st_mode)) {
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reply_with_error ("%s: not a directory", dir);
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return -1;
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}
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sysrootdirlen = strlen (sysrootdir);
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if (asprintf_nowarn (&cmd, "%s %Q -print0", str_find, sysrootdir) == -1) {
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reply_with_perror ("asprintf");
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return -1;
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}
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if (verbose)
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fprintf (stderr, "%s\n", cmd);
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fp = popen (cmd, "r");
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if (fp == NULL) {
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reply_with_perror ("%s", cmd);
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return -1;
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}
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/* Now we must send the reply message, before the file contents. After
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* this there is no opportunity in the protocol to send any error
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* message back. Instead we can only cancel the transfer.
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*/
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reply (NULL, NULL);
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/* The code below assumes each path returned can fit into a protocol
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* chunk (if not you'll get a runtime protocol error). If this
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* turns out not to be a problem at some point in the future then
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* we'll need to modify the code to handle it. XXX
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*/
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while ((r = input_to_nul (fp, str, GUESTFS_MAX_CHUNK_SIZE)) > 0) {
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const size_t len = strlen (str);
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if (len <= sysrootdirlen)
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continue;
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/* Remove the directory part of the path before sending it. */
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if (send_file_write (str + sysrootdirlen, r - sysrootdirlen) < 0) {
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pclose (fp);
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return -1;
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}
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}
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if (ferror (fp)) {
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fprintf (stderr, "fgetc: %s: %m\n", dir);
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send_file_end (1); /* Cancel. */
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pclose (fp);
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return -1;
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}
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if (pclose (fp) != 0) {
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fprintf (stderr, "pclose: %s: %m\n", dir);
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send_file_end (1); /* Cancel. */
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return -1;
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}
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if (send_file_end (0)) /* Normal end of file. */
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return -1;
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return 0;
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}
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