summaryrefslogtreecommitdiff
path: root/libbb/xfuncs.c
blob: 6d54c1a794f931e5919fee4042dadf69e15061f1 (plain)
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
/* 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 <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>

/* Since gcc always inlines strlen(), this saves a byte or two, but we need
 * the #undef here to avoid endless loop from #define strlen bb_strlen */
#ifdef L_strlen
#define BB_STRLEN_IMPLEMENTATION
#endif

#include "libbb.h"


#ifndef DMALLOC
#ifdef L_xmalloc
extern 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
extern 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_xcalloc
extern 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
extern 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
extern 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
extern int bb_xopen(const char *pathname, int flags)
{
	int ret;

	ret = open(pathname, flags, 0777);
	if (ret == -1) {
		bb_perror_msg_and_die("%s", pathname);
	}
	return ret;
}
#endif

#ifdef L_xread
extern ssize_t bb_xread(int fd, void *buf, size_t count)
{
	ssize_t size;

	size = read(fd, buf, count);
	if (size == -1) {
		bb_perror_msg_and_die(bb_msg_read_error);
	}
	return(size);
}
#endif

#ifdef L_xread_all
extern 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
extern unsigned char bb_xread_char(int fd)
{
	char tmp;

	bb_xread_all(fd, &tmp, 1);

	return(tmp);
}
#endif

#ifdef L_xferror
extern void bb_xferror(FILE *fp, const char *fn)
{
	if (ferror(fp)) {
		bb_error_msg_and_die("%s", fn);
	}
}
#endif

#ifdef L_xferror_stdout
extern void bb_xferror_stdout(void)
{
	bb_xferror(stdout, bb_msg_standard_output);
}
#endif

#ifdef L_xfflush_stdout
extern void bb_xfflush_stdout(void)
{
	if (fflush(stdout)) {
		bb_perror_msg_and_die(bb_msg_standard_output);
	}
}
#endif

#ifdef L_strlen
size_t bb_strlen(const char *string)
{
	    return(strlen(string));
}
#endif

/* END CODE */
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/