mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-22 07:03:38 +00:00
14df5fa5d1
Previously a lot of daemon code used three variables (a string list,
'int size' and 'int alloc') to track growable strings buffers. This
commit implements a simple struct containing the same variables, but
using size_t instead of int:
struct stringsbuf {
char **argv;
size_t size;
size_t alloc;
};
Use it like this:
DECLARE_STRINGSBUF (ret);
//...
if (add_string (&ret, str) == -1)
return NULL;
//...
if (end_stringsbuf (&ret) == -1)
return NULL;
return ret.argv;
132 lines
2.8 KiB
C
132 lines
2.8 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., 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 <dirent.h>
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#include <sys/stat.h>
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#include "daemon.h"
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#include "actions.h"
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char **
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do_ls (const char *path)
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{
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DECLARE_STRINGSBUF (ret);
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DIR *dir;
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struct dirent *d;
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CHROOT_IN;
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dir = opendir (path);
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CHROOT_OUT;
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if (!dir) {
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reply_with_perror ("opendir: %s", path);
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return NULL;
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}
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while ((d = readdir (dir)) != NULL) {
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if (STREQ (d->d_name, ".") || STREQ (d->d_name, ".."))
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continue;
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if (add_string (&ret, d->d_name) == -1) {
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closedir (dir);
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return NULL;
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}
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}
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if (ret.size > 0)
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sort_strings (ret.argv, ret.size);
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if (end_stringsbuf (&ret) == -1) {
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closedir (dir);
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return NULL;
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}
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if (closedir (dir) == -1) {
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reply_with_perror ("closedir: %s", path);
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free_stringslen (ret.argv, ret.size);
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return NULL;
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}
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return ret.argv;
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}
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/* Because we can't chroot and run the ls command (since 'ls' won't
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* necessarily exist in the chroot), this command can be used to escape
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* from the sysroot (eg. 'll /..'). This command is not meant for
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* serious use anyway, just for quick interactive sessions.
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*/
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char *
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do_ll (const char *path)
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{
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int r;
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char *out, *err;
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char *spath;
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spath = sysroot_path (path);
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if (!spath) {
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reply_with_perror ("malloc");
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return NULL;
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}
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r = command (&out, &err, "ls", "-la", spath, NULL);
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free (spath);
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if (r == -1) {
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reply_with_error ("%s", 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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return out; /* caller frees */
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}
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char *
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do_llz (const char *path)
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{
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int r;
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char *out, *err;
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char *spath;
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spath = sysroot_path (path);
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if (!spath) {
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reply_with_perror ("malloc");
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return NULL;
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}
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r = command (&out, &err, "ls", "-laZ", spath, NULL);
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free (spath);
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if (r == -1) {
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reply_with_error ("%s", 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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return out; /* caller frees */
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}
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