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
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include "busybox.h"
#ifndef DMALLOC
#ifdef L_xmalloc
void *xmalloc(size_t size)
{
void *ptr = malloc(size);
if (ptr == NULL && size != 0)
bb_error_msg_and_die(bb_msg_memory_exhausted);
return ptr;
}
#endif
#ifdef L_xrealloc
void *xrealloc(void *ptr, size_t size)
{
ptr = realloc(ptr, size);
if (ptr == NULL && size != 0)
bb_error_msg_and_die(bb_msg_memory_exhausted);
return ptr;
}
#endif
#ifdef L_xzalloc
void *xzalloc(size_t size)
{
void *ptr = xmalloc(size);
memset(ptr, 0, size);
return ptr;
}
#endif
#ifdef L_xcalloc
void *xcalloc(size_t nmemb, size_t size)
{
void *ptr = calloc(nmemb, size);
if (ptr == NULL && nmemb != 0 && size != 0)
bb_error_msg_and_die(bb_msg_memory_exhausted);
return ptr;
}
#endif
#endif /* DMALLOC */
#ifdef L_xstrdup
char * bb_xstrdup (const char *s)
{
char *t;
if (s == NULL)
return NULL;
t = strdup (s);
if (t == NULL)
bb_error_msg_and_die(bb_msg_memory_exhausted);
return t;
}
#endif
#ifdef L_xstrndup
char * bb_xstrndup (const char *s, int n)
{
char *t;
if (s == NULL)
bb_error_msg_and_die("bb_xstrndup bug");
t = xmalloc(++n);
return safe_strncpy(t,s,n);
}
#endif
#ifdef L_xfopen
FILE *bb_xfopen(const char *path, const char *mode)
{
FILE *fp;
if ((fp = fopen(path, mode)) == NULL)
bb_perror_msg_and_die("%s", path);
return fp;
}
#endif
#ifdef L_xopen
int bb_xopen(const char *pathname, int flags)
{
return bb_xopen3(pathname, flags, 0777);
}
#endif
#ifdef L_xopen3
int bb_xopen3(const char *pathname, int flags, int mode)
{
int ret;
ret = open(pathname, flags, mode);
if (ret < 0) {
bb_perror_msg_and_die("%s", pathname);
}
return ret;
}
#endif
#ifdef L_xread
ssize_t bb_xread(int fd, void *buf, size_t count)
{
ssize_t size;
size = read(fd, buf, count);
if (size < 0) {
bb_perror_msg_and_die(bb_msg_read_error);
}
return(size);
}
#endif
#ifdef L_xread_all
void bb_xread_all(int fd, void *buf, size_t count)
{
ssize_t size;
while (count) {
if ((size = bb_xread(fd, buf, count)) == 0) { /* EOF */
bb_error_msg_and_die("Short read");
}
count -= size;
buf = ((char *) buf) + size;
}
return;
}
#endif
#ifdef L_xread_char
unsigned char bb_xread_char(int fd)
{
char tmp;
bb_xread_all(fd, &tmp, 1);
return(tmp);
}
#endif
#ifdef L_xferror
void bb_xferror(FILE *fp, const char *fn)
{
if (ferror(fp)) {
bb_error_msg_and_die("%s", fn);
}
}
#endif
#ifdef L_xferror_stdout
void bb_xferror_stdout(void)
{
bb_xferror(stdout, bb_msg_standard_output);
}
#endif
#ifdef L_xfflush_stdout
void bb_xfflush_stdout(void)
{
if (fflush(stdout)) {
bb_perror_msg_and_die(bb_msg_standard_output);
}
}
#endif
#ifdef L_spawn
// This does a fork/exec in one call, using vfork().
pid_t bb_spawn(char **argv)
{
static int failed;
pid_t pid;
void *app = find_applet_by_name(argv[0]);
// Be nice to nommu machines.
failed = 0;
pid = vfork();
if (pid < 0) return pid;
if (!pid) {
execvp(app ? CONFIG_BUSYBOX_EXEC_PATH : *argv, argv);
// We're sharing a stack with blocked parent, let parent know we failed
// and then exit to unblock parent (but don't run atexit() stuff, which
// would screw up parent.)
failed = -1;
_exit(0);
}
return failed ? failed : pid;
}
#endif
#ifdef L_xspawn
pid_t bb_xspawn(char **argv)
{
pid_t pid = bb_spawn(argv);
if (pid < 0) bb_perror_msg_and_die("%s", *argv);
return pid;
}
#endif
#ifdef L_wait4
int wait4pid(int pid)
{
int status;
if (pid == -1 || waitpid(pid, &status, 0) == -1) return -1;
if (WIFEXITED(status)) return WEXITSTATUS(status);
if (WIFSIGNALED(status)) return WTERMSIG(status);
return 0;
}
#endif
|
