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
)
62 size_t buf_len
, line_size
;
67 while (fgets(buf
, BUFSIZ
, fp
)) {
68 buf_len
= strlen(buf
);
69 if (buf_len
> 0 && buf
[buf_len
- 1] == '\n') {
76 line
= xrealloc(line
, line_size
+ 1);
77 strncat(line
, buf
, line_size
);
79 line_size
= buf_len
+ 1;
89 int file_move(const char *src
, const char *dest
)
93 err
= rename(src
, dest
);
96 /* src & dest live on different file systems */
97 err
= file_copy(src
, dest
);
101 opkg_perror(ERROR
, "Failed to rename %s to %s",
109 int file_copy(const char *src
, const char *dest
)
113 err
= copy_file(src
, dest
, FILEUTILS_FORCE
| FILEUTILS_PRESERVE_STATUS
);
115 opkg_msg(ERROR
, "Failed to copy file %s to %s.\n", src
, dest
);
120 int file_mkdir_hier(const char *path
, long mode
)
122 return make_directory(path
, mode
, FILEUTILS_RECUR
);
126 static int hex2bin(unsigned char x
)
128 if (x
>= 'a' && x
<= 'f')
130 else if (x
>= 'A' && x
<= 'F')
132 else if (x
>= '0' && x
<= '9')
138 static const unsigned char bin2hex
[16] = {
145 char *file_md5sum_alloc(const char *file_name
)
147 static const int md5sum_bin_len
= 16;
148 static const int md5sum_hex_len
= 32;
152 unsigned char md5sum_bin
[md5sum_bin_len
];
154 len
= md5sum(file_name
, md5sum_bin
);
157 opkg_msg(ERROR
, "Could't compute md5sum for %s.\n", file_name
);
161 md5sum_hex
= xcalloc(1, md5sum_hex_len
+ 1);
163 for (i
= 0; i
< md5sum_bin_len
; i
++) {
164 md5sum_hex
[i
* 2] = bin2hex
[md5sum_bin
[i
] >> 4];
165 md5sum_hex
[i
* 2 + 1] = bin2hex
[md5sum_bin
[i
] & 0xf];
168 md5sum_hex
[md5sum_hex_len
] = '\0';
173 char *file_sha256sum_alloc(const char *file_name
)
175 static const int sha256sum_bin_len
= 32;
176 static const int sha256sum_hex_len
= 64;
181 unsigned char sha256sum_bin
[sha256sum_bin_len
];
183 sha256sum_hex
= xcalloc(1, sha256sum_hex_len
+ 1);
185 file
= fopen(file_name
, "r");
187 opkg_perror(ERROR
, "Failed to open file %s", file_name
);
192 err
= sha256_stream(file
, sha256sum_bin
);
194 opkg_msg(ERROR
, "Could't compute sha256sum for %s.\n",
203 for (i
= 0; i
< sha256sum_bin_len
; i
++) {
204 sha256sum_hex
[i
* 2] = bin2hex
[sha256sum_bin
[i
] >> 4];
205 sha256sum_hex
[i
* 2 + 1] = bin2hex
[sha256sum_bin
[i
] & 0xf];
208 sha256sum_hex
[sha256sum_hex_len
] = '\0';
210 return sha256sum_hex
;
213 char *checksum_bin2hex(const char *src
, size_t len
)
216 static unsigned char buf
[65];
217 const unsigned char *s
= (unsigned char *)src
;
221 for (p
= buf
; len
> 0; s
++, len
--) {
222 *p
++ = bin2hex
[*s
/ 16];
223 *p
++ = bin2hex
[*s
% 16];
231 char *checksum_hex2bin(const char *src
, size_t *len
)
235 const unsigned char *s
;
236 static unsigned char buf
[32];
243 while (isspace(*src
))
253 for (s
= (unsigned char *)src
, p
= buf
, *len
= 0;
254 slen
> 0 && isxdigit(s
[0]) && isxdigit(s
[1]);
255 slen
--, s
+= 2, (*len
)++)
256 *p
++ = hex2bin(s
[0]) * 16 + hex2bin(s
[1]);
261 int rm_r(const char *path
)
268 opkg_perror(ERROR
, "Missing directory parameter");
274 opkg_perror(ERROR
, "Failed to open dir %s", path
);
278 if (fchdir(dirfd(dir
)) == -1) {
279 opkg_perror(ERROR
, "Failed to change to dir %s", path
);
286 if ((dent
= readdir(dir
)) == NULL
) {
288 opkg_perror(ERROR
, "Failed to read dir %s",
295 if (!strcmp(dent
->d_name
, ".") || !strcmp(dent
->d_name
, ".."))
299 if (dent
->d_type
== DT_DIR
) {
300 if ((ret
= rm_r(dent
->d_name
)) == -1)
303 } else if (dent
->d_type
== DT_UNKNOWN
)
307 if ((ret
= lstat(dent
->d_name
, &st
)) == -1) {
308 opkg_perror(ERROR
, "Failed to lstat %s",
312 if (S_ISDIR(st
.st_mode
)) {
313 if ((ret
= rm_r(dent
->d_name
)) == -1)
319 if ((ret
= unlink(dent
->d_name
)) == -1) {
320 opkg_perror(ERROR
, "Failed to unlink %s", dent
->d_name
);
325 if (chdir("..") == -1) {
327 opkg_perror(ERROR
, "Failed to change to dir %s/..", path
);
330 if (rmdir(path
) == -1) {
332 opkg_perror(ERROR
, "Failed to remove dir %s", path
);
335 if (closedir(dir
) == -1) {
337 opkg_perror(ERROR
, "Failed to close dir %s", path
);
343 static int urlencode_is_specialchar(char c
)
371 char *urlencode_path(const char *filename
)
374 const unsigned char *in
;
375 unsigned char *copy
, *out
;
377 for (in
= (unsigned char *)filename
; *in
!= 0; in
++)
378 len
+= urlencode_is_specialchar(*in
) ? 3 : 1;
380 copy
= xcalloc(1, len
+ 1);
382 for (in
= (unsigned char *)filename
, out
= copy
; *in
!= 0; in
++) {
383 if (urlencode_is_specialchar(*in
)) {
385 *out
++ = bin2hex
[*in
/ 16];
386 *out
++ = bin2hex
[*in
% 16];
396 char *urldecode_path(const char *filename
)
398 unsigned char *copy
= (unsigned char *)xstrdup(filename
);
399 unsigned char *in
, *out
;
401 for (in
= copy
, out
= copy
; *in
!= 0; in
++) {
402 if (*in
== '%' && isxdigit(in
[1]) && isxdigit(in
[2])) {
403 *out
++ = hex2bin(in
[1]) * 16 + hex2bin(in
[2]);