1 /* guestfish - the filesystem interactive shell
2 * Copyright (C) 2009 Red Hat Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 /* guestfish edit command, suggested by Ján Ondrej, implemented by RWMJ */
33 load_file (const char *filename, size_t *len_r)
36 char *content = NULL, *p;
41 fd = open (filename, O_RDONLY);
47 while ((r = read (fd, buf, sizeof buf)) > 0) {
50 p = realloc (content, *len_r + 1);
57 memcpy (content + start, buf, r);
58 content[start+r] = '\0';
67 if (close (fd) == -1) {
77 do_edit (const char *cmd, int argc, char *argv[])
79 char filename[] = "/tmp/guestfishXXXXXX";
82 char *content, *content_new;
86 fprintf (stderr, _("use '%s filename' to edit a file\n"), cmd);
90 /* Choose an editor. */
91 if (STRCASEEQ (cmd, "vi"))
93 else if (STRCASEEQ (cmd, "emacs"))
96 editor = getenv ("EDITOR");
98 editor = "vi"; /* could be cruel here and choose ed(1) */
101 /* Download the file and write it to a temporary. */
102 fd = mkstemp (filename);
108 if ((content = guestfs_cat (g, argv[0])) == NULL) {
114 if (xwrite (fd, content, strlen (content)) == -1) {
121 if (close (fd) == -1) {
130 snprintf (buf, sizeof buf, "%s %s", editor, filename);
142 content_new = load_file (filename, &size);
143 if (content_new == NULL) {
152 if (strlen (content) == size && STREQLEN (content, content_new, size)) {
158 /* Write new content. */
159 if (guestfs_write_file (g, argv[0], content_new, size) == -1) {