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
|
/*
* pathsearch.c: $PATH-searching functions.
*
* Copyright (C) 2004, 2007, 2008, 2009, 2011 Colin Watson.
*
* This file is part of man-db.
*
* man-db 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.
*
* man-db 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 man-db; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif /* HAVE_CONFIG_H */
#include <assert.h>
#include <errno.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "gettext.h"
#define _(String) gettext (String)
#include "xalloc.h"
#include "xgetcwd.h"
#include "xvasprintf.h"
#include "manconfig.h"
#include "fatal.h"
#include "pathsearch.h"
static bool pathsearch (const char *name, const mode_t bits)
{
char *cwd = NULL;
char *path = getenv ("PATH");
char *pathtok;
const char *element;
struct stat st;
bool ret = false;
if (!path)
/* Eh? Oh well. */
return false;
if (strchr (name, '/')) {
/* Qualified name; look directly. */
if (stat (name, &st) == -1)
return false;
if (S_ISREG (st.st_mode) && (st.st_mode & bits))
return true;
return false;
}
pathtok = path = xstrdup (path);
/* Unqualified name; iterate over $PATH looking for it. */
for (element = strsep (&pathtok, ":"); element;
element = strsep (&pathtok, ":")) {
char *filename;
if (!*element) {
if (!cwd)
cwd = xgetcwd ();
if (!cwd)
fatal (errno, _ ("can't determine current "
"directory"));
element = cwd;
}
filename = xasprintf ("%s/%s", element, name);
assert (filename);
if (stat (filename, &st) == -1) {
free (filename);
continue;
}
free (filename);
if (S_ISREG (st.st_mode) && (st.st_mode & bits)) {
ret = true;
break;
}
}
free (path);
free (cwd);
return ret;
}
bool pathsearch_executable (const char *name)
{
return pathsearch (name, 0111);
}
bool directory_on_path (const char *dir)
{
char *cwd = NULL;
char *path = getenv ("PATH");
char *pathtok;
const char *element;
bool ret = false;
if (!path)
/* Eh? Oh well. */
return false;
pathtok = path = xstrdup (path);
for (element = strsep (&pathtok, ":"); element;
element = strsep (&pathtok, ":")) {
if (!*element) {
if (!cwd)
cwd = xgetcwd ();
if (!cwd)
fatal (errno, _ ("can't determine current "
"directory"));
element = cwd;
}
if (STREQ (element, dir)) {
ret = true;
break;
}
}
free (path);
free (cwd);
return ret;
}
|
