mirror of
https://github.com/libguestfs/libguestfs.git
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140 lines
3.0 KiB
C
140 lines
3.0 KiB
C
/* libguestfs - the guestfsd daemon
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* Copyright (C) 2009 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., 675 Mass Ave, Cambridge, MA 02139, 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 "../src/guestfs_protocol.h"
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#include "daemon.h"
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#include "actions.h"
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static char **
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grep (const char *prog, const char *flag, const char *regex, const char *path)
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{
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char *out, *err;
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int fd, flags, r;
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char **lines;
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CHROOT_IN;
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fd = open (path, O_RDONLY);
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CHROOT_OUT;
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if (fd == -1) {
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reply_with_perror ("%s", path);
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return NULL;
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}
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/* Note that grep returns an error if no match. We want to
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* suppress this error and return an empty list.
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*/
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flags = COMMAND_FLAG_CHROOT_COPY_FILE_TO_STDIN | fd;
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r = commandrf (&out, &err, flags, prog, flag, regex, NULL);
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if (r == -1 || r > 1) {
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reply_with_error ("%s %s %s: %s", prog, flag, regex, err);
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free (out);
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free (err);
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return NULL;
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}
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free (err);
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lines = split_lines (out);
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free (out);
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if (lines == NULL) return NULL;
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return lines;
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}
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char **
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do_grep (const char *regex, const char *path)
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{
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/* The "--" is not really needed, but it helps when we don't need a flag. */
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return grep ("grep", "--", regex, path);
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}
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char **
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do_egrep (const char *regex, const char *path)
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{
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return grep ("egrep", "--", regex, path);
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}
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char **
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do_fgrep (const char *regex, const char *path)
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{
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return grep ("fgrep", "--", regex, path);
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}
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char **
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do_grepi (const char *regex, const char *path)
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{
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return grep ("grep", "-i", regex, path);
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}
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char **
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do_egrepi (const char *regex, const char *path)
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{
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return grep ("egrep", "-i", regex, path);
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}
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char **
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do_fgrepi (const char *regex, const char *path)
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{
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return grep ("fgrep", "-i", regex, path);
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}
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char **
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do_zgrep (const char *regex, const char *path)
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{
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return grep ("zgrep", "--", regex, path);
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}
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char **
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do_zegrep (const char *regex, const char *path)
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{
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return grep ("zegrep", "--", regex, path);
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}
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char **
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do_zfgrep (const char *regex, const char *path)
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{
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return grep ("zfgrep", "--", regex, path);
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}
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char **
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do_zgrepi (const char *regex, const char *path)
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{
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return grep ("zgrep", "-i", regex, path);
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}
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char **
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do_zegrepi (const char *regex, const char *path)
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{
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return grep ("zegrep", "-i", regex, path);
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}
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char **
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do_zfgrepi (const char *regex, const char *path)
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{
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return grep ("zfgrep", "-i", regex, path);
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}
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