1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
/* guestfish - the filesystem interactive shell
* Copyright (C) 2009 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <inttypes.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "fish.h"
/* guestfish edit command, suggested by Ján Ondrej, implemented by RWMJ */
int
do_edit (const char *cmd, int argc, char *argv[])
{
char filename[] = "/tmp/guestfishXXXXXX";
char buf[256];
const char *editor;
struct stat oldstat, newstat;
int r, fd;
if (argc != 1) {
fprintf (stderr, _("use '%s filename' to edit a file\n"), cmd);
return -1;
}
/* Choose an editor. */
if (STRCASEEQ (cmd, "vi"))
editor = "vi";
else if (STRCASEEQ (cmd, "emacs"))
editor = "emacs -nw";
else {
editor = getenv ("EDITOR");
if (editor == NULL)
editor = "vi"; /* could be cruel here and choose ed(1) */
}
/* Download the file and write it to a temporary. */
fd = mkstemp (filename);
if (fd == -1) {
perror ("mkstemp");
return -1;
}
snprintf (buf, sizeof buf, "/dev/fd/%d", fd);
if (guestfs_download (g, argv[0], buf) == -1) {
close (fd);
unlink (filename);
return -1;
}
if (close (fd) == -1) {
perror (filename);
unlink (filename);
return -1;
}
/* Get the old stat. */
if (stat (filename, &oldstat) == -1) {
perror (filename);
unlink (filename);
return -1;
}
/* Edit it. */
/* XXX Safe? */
snprintf (buf, sizeof buf, "%s %s", editor, filename);
r = system (buf);
if (r != 0) {
perror (buf);
unlink (filename);
return -1;
}
/* Get the new stat. */
if (stat (filename, &newstat) == -1) {
perror (filename);
unlink (filename);
return -1;
}
/* Changed? */
if (oldstat.st_ctime == newstat.st_ctime &&
oldstat.st_size == newstat.st_size) {
unlink (filename);
return 0;
}
/* Write new content. */
if (guestfs_upload (g, filename, argv[0]) == -1) {
unlink (filename);
return -1;
}
unlink (filename);
return 0;
}
|
