blob: 89e050051a16acb6ee94fa267d7b174f8b9f1f79 [file] [log] [blame]
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +00001/* vi: set sw=4 ts=4: */
2/*
3 * See README for additional information
4 *
5 * This file can be redistributed under the terms of the GNU Library General
6 * Public License
7 */
8
9#include "libbb.h"
10#include "e2fs_lib.h"
11
12#define HAVE_EXT2_IOCTLS 1
13
14#if INT_MAX == LONG_MAX
Denis Vlasenko8acf5212007-04-15 11:48:27 +000015#define IF_LONG_IS_SAME(...) __VA_ARGS__
16#define IF_LONG_IS_WIDER(...)
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +000017#else
Denis Vlasenko8acf5212007-04-15 11:48:27 +000018#define IF_LONG_IS_SAME(...)
19#define IF_LONG_IS_WIDER(...) __VA_ARGS__
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +000020#endif
21
22static void close_silently(int fd)
23{
24 int e = errno;
25 close(fd);
26 errno = e;
27}
28
29
30/* Iterate a function on each entry of a directory */
31int iterate_on_dir(const char *dir_name,
32 int (*func)(const char *, struct dirent *, void *),
33 void * private)
34{
35 DIR *dir;
36 struct dirent *de, *dep;
37 int max_len, len;
38
39 max_len = PATH_MAX + sizeof(struct dirent);
40 de = xmalloc(max_len+1);
41 memset(de, 0, max_len+1);
42
43 dir = opendir(dir_name);
44 if (dir == NULL) {
45 free(de);
46 return -1;
47 }
48 while ((dep = readdir(dir))) {
49 len = sizeof(struct dirent);
50 if (len < dep->d_reclen)
51 len = dep->d_reclen;
52 if (len > max_len)
53 len = max_len;
54 memcpy(de, dep, len);
55 func(dir_name, de, private);
56 }
57 closedir(dir);
58 free(de);
59 return 0;
60}
61
62
63/* Get/set a file version on an ext2 file system */
64int fgetsetversion(const char *name, unsigned long *get_version, unsigned long set_version)
65{
66#if HAVE_EXT2_IOCTLS
67 int fd, r;
68 IF_LONG_IS_WIDER(int ver;)
69
70 fd = open(name, O_NONBLOCK);
71 if (fd == -1)
72 return -1;
73 if (!get_version) {
74 IF_LONG_IS_WIDER(
75 ver = (int) set_version;
76 r = ioctl(fd, EXT2_IOC_SETVERSION, &ver);
77 )
78 IF_LONG_IS_SAME(
79 r = ioctl(fd, EXT2_IOC_SETVERSION, (void*)&set_version);
80 )
81 } else {
82 IF_LONG_IS_WIDER(
83 r = ioctl(fd, EXT2_IOC_GETVERSION, &ver);
84 *get_version = ver;
85 )
86 IF_LONG_IS_SAME(
87 r = ioctl(fd, EXT2_IOC_GETVERSION, (void*)get_version);
88 )
89 }
90 close_silently(fd);
91 return r;
92#else /* ! HAVE_EXT2_IOCTLS */
93 errno = EOPNOTSUPP;
94 return -1;
95#endif /* ! HAVE_EXT2_IOCTLS */
96}
97
98
99/* Get/set a file flags on an ext2 file system */
100int fgetsetflags(const char *name, unsigned long *get_flags, unsigned long set_flags)
101{
102#if HAVE_EXT2_IOCTLS
103 struct stat buf;
104 int fd, r;
105 IF_LONG_IS_WIDER(int f;)
106
107 if (stat(name, &buf) == 0 /* stat is ok */
108 && !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)
109 ) {
110 goto notsupp;
111 }
112 fd = open(name, O_NONBLOCK); /* neither read nor write asked for */
113 if (fd == -1)
114 return -1;
115
116 if (!get_flags) {
117 IF_LONG_IS_WIDER(
118 f = (int) set_flags;
119 r = ioctl(fd, EXT2_IOC_SETFLAGS, &f);
120 )
121 IF_LONG_IS_SAME(
122 r = ioctl(fd, EXT2_IOC_SETFLAGS, (void*)&set_flags);
123 )
124 } else {
125 IF_LONG_IS_WIDER(
126 r = ioctl(fd, EXT2_IOC_GETFLAGS, &f);
127 *get_flags = f;
128 )
129 IF_LONG_IS_SAME(
130 r = ioctl(fd, EXT2_IOC_GETFLAGS, (void*)get_flags);
131 )
132 }
133
134 close_silently(fd);
135 return r;
136 notsupp:
137#endif /* HAVE_EXT2_IOCTLS */
138 errno = EOPNOTSUPP;
139 return -1;
140}
141
142
143/* Print file attributes on an ext2 file system */
Denis Vlasenkod059ddc2007-10-30 19:36:07 +0000144const uint32_t e2attr_flags_value[] = {
145#ifdef ENABLE_COMPRESSION
146 EXT2_COMPRBLK_FL,
147 EXT2_DIRTY_FL,
148 EXT2_NOCOMPR_FL,
149 EXT2_ECOMPR_FL,
150#endif
151 EXT2_INDEX_FL,
152 EXT2_SECRM_FL,
153 EXT2_UNRM_FL,
154 EXT2_SYNC_FL,
155 EXT2_DIRSYNC_FL,
156 EXT2_IMMUTABLE_FL,
157 EXT2_APPEND_FL,
158 EXT2_NODUMP_FL,
159 EXT2_NOATIME_FL,
160 EXT2_COMPR_FL,
161 EXT3_JOURNAL_DATA_FL,
162 EXT2_NOTAIL_FL,
163 EXT2_TOPDIR_FL
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000164};
165
Denis Vlasenkod059ddc2007-10-30 19:36:07 +0000166const char e2attr_flags_sname[] =
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000167#ifdef ENABLE_COMPRESSION
Denis Vlasenkod059ddc2007-10-30 19:36:07 +0000168 "BZXE"
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000169#endif
Denis Vlasenkod059ddc2007-10-30 19:36:07 +0000170 "I"
171 "suSDiadAcjtT";
172
173static const char e2attr_flags_lname[] =
174#ifdef ENABLE_COMPRESSION
175 "Compressed_File" "\0"
176 "Compressed_Dirty_File" "\0"
177 "Compression_Raw_Access" "\0"
178 "Compression_Error" "\0"
179#endif
180 "Indexed_directory" "\0"
181 "Secure_Deletion" "\0"
182 "Undelete" "\0"
183 "Synchronous_Updates" "\0"
184 "Synchronous_Directory_Updates" "\0"
185 "Immutable" "\0"
186 "Append_Only" "\0"
187 "No_Dump" "\0"
188 "No_Atime" "\0"
189 "Compression_Requested" "\0"
190 "Journaled_Data" "\0"
191 "No_Tailmerging" "\0"
192 "Top_of_Directory_Hierarchies" "\0"
193 /* Another trailing NUL is added by compiler */;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000194
195void print_flags(FILE *f, unsigned long flags, unsigned options)
196{
Denis Vlasenkod059ddc2007-10-30 19:36:07 +0000197 const uint32_t *fv;
198 const char *fn;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000199
Denis Vlasenkod059ddc2007-10-30 19:36:07 +0000200 fv = e2attr_flags_value;
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000201 if (options & PFOPT_LONG) {
202 int first = 1;
Denis Vlasenkod059ddc2007-10-30 19:36:07 +0000203 fn = e2attr_flags_lname;
204 do {
205 if (flags & *fv) {
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000206 if (!first)
207 fputs(", ", f);
Denis Vlasenkod059ddc2007-10-30 19:36:07 +0000208 fputs(fn, f);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000209 first = 0;
210 }
Denis Vlasenkod059ddc2007-10-30 19:36:07 +0000211 fv++;
212 fn += strlen(fn) + 1;
213 } while (*fn);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000214 if (first)
215 fputs("---", f);
216 } else {
Denis Vlasenkod059ddc2007-10-30 19:36:07 +0000217 fn = e2attr_flags_sname;
218 do {
Denis Vlasenko407b8c02006-12-26 03:02:25 +0000219 char c = '-';
Denis Vlasenkod059ddc2007-10-30 19:36:07 +0000220 if (flags & *fv)
221 c = *fn;
Denis Vlasenko407b8c02006-12-26 03:02:25 +0000222 fputc(c, f);
Denis Vlasenkod059ddc2007-10-30 19:36:07 +0000223 fv++;
224 fn++;
225 } while (*fn);
Denis Vlasenkoc4f623e2006-12-26 01:30:59 +0000226 }
227}