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
|
/*
* fstrcmp - fuzzy string compare library
* Copyright (C) 2009 Peter Miller
* Written by Peter Miller <pmiller@opensource.org.au>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <lib/ac/assert.h>
#include <lib/ac/stdlib.h>
#include <lib/ac/string.h>
#include <lib/ac/unistd.h>
#include <lib/program_name.h>
static char progname[256];
static void
fstrcmp_program_name_set_real(const char *name)
{
const char *cp;
if (!name)
name = "";
progname[0] = '\0';
if (!name)
return;
cp = name;
for (;;)
{
char *pnp;
if (*cp == '/')
{
/*
* Weird but true: some Unix implementations allow trailing
* slashes on command names. Ugh. Not POSIX conforming, either.
*/
++cp;
continue;
}
if (*cp == '\0')
break;
/*
* Libtool produces "temporary" binaries before "make install"
* that have "lt-" prefixes. Rip them off when we see them.
*/
if (0 == memcmp(cp, "lt-", 3))
cp += 3;
pnp = progname;
for (;;)
{
if (pnp < progname + sizeof(progname) - 1)
*pnp++ = *cp;
++cp;
if (*cp == '\0' || *cp == '/')
break;
}
*pnp = '\0';
}
}
const char *
fstrcmp_program_name_get(void)
{
if (progname[0])
return progname;
/*
* Does procfs have something useful?
*/
{
int n;
char buf[2000];
n = readlink("/proc/self/exe", buf, sizeof(buf) - 1);
if (n > 0)
{
buf[n] = 0;
fstrcmp_program_name_set_real(buf);
}
}
if (progname[0])
return progname;
/*
* bash(1) sets the "_" environment variable,
* use that if available.
*/
fstrcmp_program_name_set_real(getenv("_"));
if (progname[0])
return progname;
return "";
}
void
fstrcmp_program_name_set(const char *name)
{
fstrcmp_program_name_set_real(name);
}
|
