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
|
/*
* xcommon.c - various functions put together to avoid basic error checking.
*
* added fcntl locking by Kjetil T. (kjetilho@math.uio.no) - aeb, 950927
*
* 1999-02-22 Arkadiusz Miskiewicz <misiek@pld.ORG.PL>
* - added Native Language Support
*
* 2006-06-06 Amit Gud <agud@redhat.com>
* - Moved code snippets here from mount/sundries.c of util-linux
* and merged code from support/nfs/xmalloc.c by Olaf Kirch <okir@monad.swb.de> here.
*/
#include <unistd.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "xcommon.h"
#include "nls.h" /* _() */
void (*at_die)(void ) = NULL;
char *
xstrndup (const char *s, int n) {
char *t;
if (s == NULL)
die (EX_SOFTWARE, _("bug in xstrndup call"));
t = xmalloc(n+1);
strncpy(t,s,n);
t[n] = 0;
return t;
}
char *
xstrconcat2 (const char *s, const char *t) {
char *res;
if (!s) s = "";
if (!t) t = "";
res = xmalloc(strlen(s) + strlen(t) + 1);
strcpy(res, s);
strcat(res, t);
return res;
}
/* frees its first arg - typical use: s = xstrconcat3(s,t,u); */
char *
xstrconcat3 (const char *s, const char *t, const char *u) {
char *res;
if (!s) s = "";
if (!t) t = "";
if (!u) u = "";
res = xmalloc(strlen(s) + strlen(t) + strlen(u) + 1);
strcpy(res, s);
strcat(res, t);
strcat(res, u);
free((void *) s);
return res;
}
/* frees its first arg - typical use: s = xstrconcat4(s,t,u,v); */
char *
xstrconcat4 (const char *s, const char *t, const char *u, const char *v) {
char *res;
if (!s) s = "";
if (!t) t = "";
if (!u) u = "";
if (!v) v = "";
res = xmalloc(strlen(s) + strlen(t) + strlen(u) + strlen(v) + 1);
strcpy(res, s);
strcat(res, t);
strcat(res, u);
strcat(res, v);
free((void *) s);
return res;
}
/* Non-fatal error. Print message and return. */
/* (print the message in a single printf, in an attempt
to avoid mixing output of several threads) */
void
nfs_error (const char *fmt, ...) {
va_list args;
char *fmt2;
fmt2 = xstrconcat2 (fmt, "\n");
va_start (args, fmt);
vfprintf (stderr, fmt2, args);
va_end (args);
free (fmt2);
}
/* Make a canonical pathname from PATH. Returns a freshly malloced string.
It is up the *caller* to ensure that the PATH is sensible. i.e.
canonicalize ("/dev/fd0/.") returns "/dev/fd0" even though ``/dev/fd0/.''
is not a legal pathname for ``/dev/fd0''. Anything we cannot parse
we return unmodified. */
char *canonicalize (const char *path) {
char canonical[PATH_MAX+2];
if (path == NULL)
return NULL;
#if 1
if (streq(path, "none") ||
streq(path, "proc") ||
streq(path, "devpts"))
return xstrdup(path);
#endif
if (realpath (path, canonical))
return xstrdup(canonical);
return xstrdup(path);
}
/* Fatal error. Print message and exit. */
void
die(int err, const char *fmt, ...) {
va_list args;
va_start(args, fmt);
vfprintf(stderr, fmt, args);
fprintf(stderr, "\n");
va_end(args);
if (at_die)
(*at_die)();
exit(err);
}
static void
die_if_null(void *t) {
if (t == NULL)
die(EX_SYSERR, _("not enough memory"));
}
void *
xmalloc (size_t size) {
void *t;
if (size == 0)
return NULL;
t = malloc(size);
die_if_null(t);
return t;
}
void *
xrealloc (void *p, size_t size) {
void *t;
t = realloc(p, size);
die_if_null(t);
return t;
}
void
xfree(void *ptr)
{
free(ptr);
}
char *
xstrdup (const char *s) {
char *t;
if (s == NULL)
return NULL;
t = strdup(s);
die_if_null(t);
return t;
}
|
