1 /* file_util.c - convenience routines for common stat operations
3 Copyright (C) 2009 Ubiq Technologies <graham.gower@gmail.com>
6 Copyright (C) 2001 University of Southern California
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 2, or (at
11 your option) any later version.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
20 #include <sys/types.h>
26 #include "sprintf_alloc.h"
27 #include "file_util.h"
28 #include <libubox/md5.h>
29 #include "libbb/libbb.h"
33 int file_exists(const char *file_name
)
37 if (stat(file_name
, &st
) == -1)
43 int file_is_dir(const char *file_name
)
47 if (stat(file_name
, &st
) == -1)
50 return S_ISDIR(st
.st_mode
);
53 /* read a single line from a file, stopping at a newline or EOF.
54 If a newline is read, it will appear in the resulting string.
55 Return value is a malloc'ed char * which should be freed at
56 some point by the caller.
58 Return value is NULL if the file is at EOF when called.
60 char *file_read_line_alloc(FILE * fp
)
65 unsigned int line_size
= 0;
70 while (fgets(buf
, BUFSIZ
, fp
)) {
71 buf_len
= strlen(buf
);
72 if (buf
[buf_len
- 1] == '\n') {
79 line
= xrealloc(line
, line_size
+ 1);
80 strncat(line
, buf
, line_size
);
82 line_size
= buf_len
+ 1;
92 int file_move(const char *src
, const char *dest
)
96 err
= rename(src
, dest
);
99 /* src & dest live on different file systems */
100 err
= file_copy(src
, dest
);
104 opkg_perror(ERROR
, "Failed to rename %s to %s",
112 int file_copy(const char *src
, const char *dest
)
116 err
= copy_file(src
, dest
, FILEUTILS_FORCE
| FILEUTILS_PRESERVE_STATUS
);
118 opkg_msg(ERROR
, "Failed to copy file %s to %s.\n", src
, dest
);
123 int file_mkdir_hier(const char *path
, long mode
)
125 return make_directory(path
, mode
, FILEUTILS_RECUR
);
128 char *file_md5sum_alloc(const char *file_name
)
130 static const int md5sum_bin_len
= 16;
131 static const int md5sum_hex_len
= 32;
133 static const unsigned char bin2hex
[16] = {
142 unsigned char md5sum_bin
[md5sum_bin_len
];
144 len
= md5sum(file_name
, md5sum_bin
);
147 opkg_msg(ERROR
, "Could't compute md5sum for %s.\n", file_name
);
151 md5sum_hex
= xcalloc(1, md5sum_hex_len
+ 1);
153 for (i
= 0; i
< md5sum_bin_len
; i
++) {
154 md5sum_hex
[i
* 2] = bin2hex
[md5sum_bin
[i
] >> 4];
155 md5sum_hex
[i
* 2 + 1] = bin2hex
[md5sum_bin
[i
] & 0xf];
158 md5sum_hex
[md5sum_hex_len
] = '\0';
163 char *file_sha256sum_alloc(const char *file_name
)
165 static const int sha256sum_bin_len
= 32;
166 static const int sha256sum_hex_len
= 64;
168 static const unsigned char bin2hex
[16] = {
178 unsigned char sha256sum_bin
[sha256sum_bin_len
];
180 sha256sum_hex
= xcalloc(1, sha256sum_hex_len
+ 1);
182 file
= fopen(file_name
, "r");
184 opkg_perror(ERROR
, "Failed to open file %s", file_name
);
189 err
= sha256_stream(file
, sha256sum_bin
);
191 opkg_msg(ERROR
, "Could't compute sha256sum for %s.\n",
200 for (i
= 0; i
< sha256sum_bin_len
; i
++) {
201 sha256sum_hex
[i
* 2] = bin2hex
[sha256sum_bin
[i
] >> 4];
202 sha256sum_hex
[i
* 2 + 1] = bin2hex
[sha256sum_bin
[i
] & 0xf];
205 sha256sum_hex
[sha256sum_hex_len
] = '\0';
207 return sha256sum_hex
;
210 char *checksum_bin2hex(const char *src
, size_t len
)
213 static unsigned char buf
[65];
214 const unsigned char *s
= (unsigned char *)src
;
215 static const unsigned char bin2hex
[16] = {
225 for (p
= buf
; len
> 0; s
++, len
--) {
226 *p
++ = bin2hex
[*s
/ 16];
227 *p
++ = bin2hex
[*s
% 16];
235 char *checksum_hex2bin(const char *src
, size_t *len
)
239 const unsigned char *s
= (unsigned char *)src
;
240 static unsigned char buf
[32];
247 while (isspace(*src
))
258 (c >= 'a' ? (c - 'a') : (c >= 'A' ? (c - 'A') : (c - '0')))
260 for (p
= buf
, *len
= 0;
261 slen
> 0 && isxdigit(s
[0]) && isxdigit(s
[1]);
262 slen
--, s
+= 2, (*len
)++)
263 *p
++ = hex(s
[0]) * 16 + hex(s
[1]);
268 int rm_r(const char *path
)
275 opkg_perror(ERROR
, "Missing directory parameter");
281 opkg_perror(ERROR
, "Failed to open dir %s", path
);
285 if (fchdir(dirfd(dir
)) == -1) {
286 opkg_perror(ERROR
, "Failed to change to dir %s", path
);
293 if ((dent
= readdir(dir
)) == NULL
) {
295 opkg_perror(ERROR
, "Failed to read dir %s",
302 if (!strcmp(dent
->d_name
, ".") || !strcmp(dent
->d_name
, ".."))
306 if (dent
->d_type
== DT_DIR
) {
307 if ((ret
= rm_r(dent
->d_name
)) == -1)
310 } else if (dent
->d_type
== DT_UNKNOWN
)
314 if ((ret
= lstat(dent
->d_name
, &st
)) == -1) {
315 opkg_perror(ERROR
, "Failed to lstat %s",
319 if (S_ISDIR(st
.st_mode
)) {
320 if ((ret
= rm_r(dent
->d_name
)) == -1)
326 if ((ret
= unlink(dent
->d_name
)) == -1) {
327 opkg_perror(ERROR
, "Failed to unlink %s", dent
->d_name
);
332 if (chdir("..") == -1) {
334 opkg_perror(ERROR
, "Failed to change to dir %s/..", path
);
337 if (rmdir(path
) == -1) {
339 opkg_perror(ERROR
, "Failed to remove dir %s", path
);
342 if (closedir(dir
) == -1) {
344 opkg_perror(ERROR
, "Failed to close dir %s", path
);
350 static int urlencode_is_specialchar(char c
)
378 char *urlencode_path(const char *filename
)
380 static const char bin2hex
[16] = {
391 for (in
= filename
; *in
!= 0; in
++)
392 len
+= urlencode_is_specialchar(*in
) ? 3 : 1;
394 copy
= xcalloc(1, len
+ 1);
396 for (in
= filename
, out
= copy
; *in
!= 0; in
++) {
397 if (urlencode_is_specialchar(*in
)) {
399 *out
++ = bin2hex
[*in
/ 16];
400 *out
++ = bin2hex
[*in
% 16];