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
|
/* file_util.c - convenience routines for common stat operations
Carl D. Worth
Copyright (C) 2001 University of Southern California
This program 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, 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
General Public License for more details.
*/
#include "ipkg.h"
#include <sys/types.h>
#include <sys/stat.h>
#include "sprintf_alloc.h"
#include "file_util.h"
#include "md5.h"
#include "libbb/libbb.h"
#undef strlen
int file_exists(const char *file_name)
{
int err;
struct stat stat_buf;
err = stat(file_name, &stat_buf);
if (err == 0) {
return 1;
} else {
return 0;
}
}
int file_is_dir(const char *file_name)
{
int err;
struct stat stat_buf;
err = stat(file_name, &stat_buf);
if (err) {
return 0;
}
return S_ISDIR(stat_buf.st_mode);
}
/* read a single line from a file, stopping at a newline or EOF.
If a newline is read, it will appear in the resulting string.
Return value is a malloc'ed char * which should be freed at
some point by the caller.
Return value is NULL if the file is at EOF when called.
*/
#define FILE_READ_LINE_BUF_SIZE 1024
char *file_read_line_alloc(FILE *file)
{
char buf[FILE_READ_LINE_BUF_SIZE];
int buf_len;
char *line = NULL;
int line_size = 0;
memset(buf, 0, FILE_READ_LINE_BUF_SIZE);
while (fgets(buf, FILE_READ_LINE_BUF_SIZE, file)) {
buf_len = strlen(buf);
if (line) {
line_size += buf_len;
line = realloc(line, line_size);
if (line == NULL) {
fprintf(stderr, "%s: out of memory\n", __FUNCTION__);
break;
}
strcat(line, buf);
} else {
line_size = buf_len + 1;
line = strdup(buf);
}
if (buf[buf_len - 1] == '\n') {
break;
}
}
return line;
}
int file_move(const char *src, const char *dest)
{
int err;
err = rename(src, dest);
if (err && errno == EXDEV) {
err = file_copy(src, dest);
unlink(src);
} else if (err) {
fprintf(stderr, "%s: ERROR: failed to rename %s to %s: %s\n",
__FUNCTION__, src, dest, strerror(errno));
}
return err;
}
/* I put these here to keep libbb dependencies from creeping all over
the ipkg code */
int file_copy(const char *src, const char *dest)
{
int err;
err = copy_file(src, dest, FILEUTILS_FORCE | FILEUTILS_PRESERVE_STATUS);
if (err) {
fprintf(stderr, "%s: ERROR: failed to copy %s to %s\n",
__FUNCTION__, src, dest);
}
return err;
}
int file_mkdir_hier(const char *path, long mode)
{
return make_directory(path, mode, FILEUTILS_RECUR);
}
char *file_md5sum_alloc(const char *file_name)
{
static const int md5sum_bin_len = 16;
static const int md5sum_hex_len = 32;
static const unsigned char bin2hex[16] = {
'0', '1', '2', '3',
'4', '5', '6', '7',
'8', '9', 'a', 'b',
'c', 'd', 'e', 'f'
};
int i, err;
FILE *file;
unsigned char *md5sum_hex;
unsigned char md5sum_bin[md5sum_bin_len];
md5sum_hex = malloc(md5sum_hex_len + 1);
if (md5sum_hex == NULL) {
fprintf(stderr, "%s: out of memory\n", __FUNCTION__);
return strdup("");
}
file = fopen(file_name, "r");
if (file == NULL) {
fprintf(stderr, "%s: Failed to open file %s: %s\n",
__FUNCTION__, file_name, strerror(errno));
return strdup("");
}
err = md5_stream(file, md5sum_bin);
if (err) {
fprintf(stderr, "%s: ERROR computing md5sum for %s: %s\n",
__FUNCTION__, file_name, strerror(err));
return strdup("");
}
fclose(file);
for (i=0; i < md5sum_bin_len; i++) {
md5sum_hex[i*2] = bin2hex[md5sum_bin[i] >> 4];
md5sum_hex[i*2+1] = bin2hex[md5sum_bin[i] & 0xf];
}
md5sum_hex[md5sum_hex_len] = '\0';
return md5sum_hex;
}
|
