util.c revision 1e3472c5f37ca3686dd69b079d4d02a302f5798d 
1/*
2 * util.c --- utilities for the debugfs program
3 *
4 * Copyright (C) 1993, 1994 Theodore Ts'o.  This file may be
5 * redistributed under the terms of the GNU Public License.
6 *
7 */
8
9#include <stdio.h>
10#include <unistd.h>
11#include <stdlib.h>
12#include <ctype.h>
13#include <string.h>
14#include <time.h>
15
16#include "debugfs.h"
17
18FILE *open_pager(void)
19{
20	FILE *outfile;
21	char *pager = getenv("PAGER");
22
23	if (!pager)
24		outfile = stdout;
25	else {
26		outfile = popen(pager, "w");
27		if (!outfile) outfile = stdout;
28	}
29	return (outfile);
30}
31
32void close_pager(FILE *stream)
33{
34	if (stream && stream != stdout) fclose(stream);
35}
36
37/*
38 * This routine is used whenever a command needs to turn a string into
39 * an inode.
40 */
41ino_t string_to_inode(char *str)
42{
43	ino_t	ino;
44	int	len = strlen(str);
45	int	i;
46	int	retval;
47
48	/*
49	 * If the string is of the form <ino>, then treat it as an
50	 * inode number.
51	 */
52	if ((len > 2) && (str[0] == '<') && (str[len-1] == '>')) {
53		for (i = 1; i < len-1; i++)
54			if (!isdigit(str[i]))
55				break;
56		if (i == len-1)
57			return(atoi(str+1));
58	}
59
60	retval = ext2fs_namei(current_fs, root, cwd, str, &ino);
61	if (retval) {
62		com_err(str, retval, "");
63		return 0;
64	}
65	return ino;
66}
67
68/*
69 * This routine returns 1 if the filesystem is not open, and prints an
70 * error message to that effect.
71 */
72int check_fs_open(char *name)
73{
74	if (!current_fs) {
75		com_err(name, 0, "Filesystem not open");
76		return 1;
77	}
78	return 0;
79}
80
81/*
82 * This routine returns 1 if a filesystem is open, and prints an
83 * error message to that effect.
84 */
85int check_fs_not_open(char *name)
86{
87	if (current_fs) {
88		com_err(name, 0,
89			"Filesystem %s is still open.  Close it first.\n",
90			current_fs->device_name);
91		return 1;
92	}
93	return 0;
94}
95
96/*
97 * This routine returns 1 if a filesystem is not opened read/write,
98 * and prints an error message to that effect.
99 */
100int check_fs_read_write(char *name)
101{
102	if (!(current_fs->flags & EXT2_FLAG_RW)) {
103		com_err(name, 0, "Filesystem opened read/only");
104		return 1;
105	}
106	return 0;
107}
108
109/*
110 * This function takes a __u32 time value and converts it to a string,
111 * using ctime
112 */
113char *time_to_string(__u32 cl)
114{
115	time_t	t = (time_t) cl;
116
117	return ctime(&t);
118}
119
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123