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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/* filesystem.c
* Filesystem utility routines
*
* $Id: filesystem.c,v 1.4 2001/04/02 09:53:44 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@zing.org>
* Copyright 1998 Gerald Combs
*
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifndef WIN32
#include <pwd.h>
#endif
#include "filesystem.h"
/*
* Given a pathname, return a pointer to the last pathname separator
* character in the pathname, or NULL if the pathname contains no
* separators.
*/
char *
find_last_pathname_separator(char *path)
{
char *separator;
#ifdef WIN32
char c;
/*
* We have to scan for '\' or '/'.
* Get to the end of the string.
*/
separator = path + strlen(path); /* points to ending '\0' */
while (separator > path) {
c = *--separator;
if (c == '\\' || c == '/')
return separator; /* found it */
}
/*
* OK, we didn't find any, so no directories - but there might
* be a drive letter....
*/
return strchr(path, ':');
#else
separator = strrchr(path, '/');
#endif
return separator;
}
/*
* Given a pathname, return the last component.
*/
char *
get_basename(char *path)
{
char *filename;
filename = find_last_pathname_separator(path);
if (filename == NULL) {
/*
* There're no directories, drive letters, etc. in the
* name; the pathname *is* the file name.
*/
filename = path;
} else {
/*
* Skip past the pathname or drive letter separator.
*/
filename++;
}
return filename;
}
/*
* Given a pathname, return a string containing everything but the
* last component. NOTE: this overwrites the pathname handed into
* it....
*/
char *
get_dirname(char *path)
{
char *separator;
separator = find_last_pathname_separator(path);
if (separator == NULL) {
/*
* There're no directories, drive letters, etc. in the
* name; there is no directory path to return.
*/
return NULL;
}
/*
* Get rid of the last pathname separator and the final file
* name following it.
*/
*separator = '\0';
/*
* "path" now contains the pathname of the directory containing
* the file/directory to which it referred.
*/
return path;
}
const char*
get_home_dir(void)
{
static const char *home = NULL;
#ifdef WIN32
char *homedrive, *homepath;
char *homestring;
char *lastsep;
#else
struct passwd *pwd;
#endif
/* Return the cached value, if available */
if (home)
return home;
#ifdef WIN32
/*
* XXX - should we use USERPROFILE anywhere in this process?
* Is there a chance that it might be set but one or more of
* HOMEDRIVE or HOMEPATH isn't set?
*/
homedrive = getenv("HOMEDRIVE");
if (homedrive != NULL) {
homepath = getenv("HOMEPATH");
if (homepath != NULL) {
/*
* This is cached, so we don't need to worry about
* allocating multiple ones of them.
*/
homestring =
g_malloc(strlen(homedrive) + strlen(homepath) + 1);
strcpy(homestring, homedrive);
strcat(homestring, homepath);
/*
* Trim off any trailing slash or backslash.
*/
lastsep = find_last_pathname_separator(homestring);
if (lastsep != NULL && *(lastsep + 1) == '\0') {
/*
* Last separator is the last character
* in the string. Nuke it.
*/
*lastsep = '\0';
}
home = homestring;
} else
home = homedrive;
} else {
/*
* Try using "windir?
*/
home = "C:";
}
#else
home = getenv("HOME");
if (home == NULL) {
/*
* Get their home directory from the password file.
* If we can't even find a password file entry for them,
* use "/tmp".
*/
pwd = getpwuid(getuid());
if (pwd != NULL) {
/*
* This is cached, so we don't need to worry
* about allocating multiple ones of them.
*/
home = g_strdup(pwd->pw_dir);
} else
home = "/tmp";
}
#endif
return home;
}
|
