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-rw-r--r--cp_mv.c279
1 files changed, 181 insertions, 98 deletions
diff --git a/cp_mv.c b/cp_mv.c
index 4c55e62d0..8dbc4e8f1 100644
--- a/cp_mv.c
+++ b/cp_mv.c
@@ -37,11 +37,15 @@
37#include <utime.h> 37#include <utime.h>
38#include <dirent.h> 38#include <dirent.h>
39#include <sys/param.h> 39#include <sys/param.h>
40#include <setjmp.h> /* Ok to use this since `ash' does, therefore it's in the libc subset already. */
41#include <string.h>
42#include <unistd.h>
43#include <errno.h>
40 44
41#define is_cp 0 45#define is_cp 0
42#define is_mv 1 46#define is_mv 1
47static int dz_i; /* index into cp_mv_usage */
43static const char *dz; /* dollar zero, .bss */ 48static const char *dz; /* dollar zero, .bss */
44static int dz_i; /* index, .bss */
45static const char *cp_mv_usage[] = /* .rodata */ 49static const char *cp_mv_usage[] = /* .rodata */
46{ 50{
47 "cp [OPTION]... SOURCE DEST\n" 51 "cp [OPTION]... SOURCE DEST\n"
@@ -55,92 +59,131 @@ static const char *cp_mv_usage[] = /* .rodata */
55 "mv SOURCE DEST\n" 59 "mv SOURCE DEST\n"
56 " or: mv SOURCE... DIRECTORY\n\n" 60 " or: mv SOURCE... DIRECTORY\n\n"
57 "Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY.\n" 61 "Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY.\n"
58 "Warning!! This is not GNU `mv'. It does not preserve hard links.\n"
59}; 62};
60 63
61extern int cp_mv_main(int argc, char **argv) 64static int recursiveFlag;
65static int followLinks;
66static int preserveFlag;
67
68static const char *baseSrcName;
69static int srcDirFlag;
70static struct stat srcStatBuf;
71
72static char baseDestName[PATH_MAX + 1];
73static size_t baseDestLen;
74static int destDirFlag;
75static struct stat destStatBuf;
76
77static jmp_buf catch;
78static volatile int mv_Action_first_time;
79
80static void name_too_long__exit (void) __attribute__((noreturn));
81
82static
83void name_too_long__exit (void)
62{ 84{
63 __label__ name_too_long__exit; 85 fprintf(stderr, name_too_long, dz);
64 __label__ exit_false; 86 exit FALSE;
65 87}
66 int recursiveFlag; 88
67 int followLinks; 89static void
68 int preserveFlag; 90fill_baseDest_buf(char *_buf, size_t * _buflen) {
69 91 const char *srcBasename;
70 const char *baseSrcName; 92 if ((srcBasename = strrchr(baseSrcName, '/')) == NULL) {
71 int srcDirFlag; 93 srcBasename = baseSrcName;
72 struct stat srcStatBuf; 94 if (_buf[*_buflen - 1] != '/') {
73 95 if (++(*_buflen) > PATH_MAX)
74 char baseDestName[PATH_MAX + 1]; 96 name_too_long__exit();
75 size_t baseDestLen; 97 strcat(_buf, "/");
76 int destDirFlag;
77 struct stat destStatBuf;
78
79 void fill_baseDest_buf(char *_buf, size_t * _buflen) {
80 const char *srcBasename;
81 if ((srcBasename = strrchr(baseSrcName, '/')) == NULL) {
82 srcBasename = baseSrcName;
83 if (_buf[*_buflen - 1] != '/') {
84 if (++(*_buflen) > PATH_MAX)
85 goto name_too_long__exit;
86 strcat(_buf, "/");
87 }
88 } 98 }
89 if (*_buflen + strlen(srcBasename) > PATH_MAX)
90 goto name_too_long__exit;
91 strcat(_buf, srcBasename);
92 return;
93 } 99 }
100 if (*_buflen + strlen(srcBasename) > PATH_MAX)
101 name_too_long__exit();
102 strcat(_buf, srcBasename);
103 return;
104
105}
94 106
95 int fileAction(const char *fileName, struct stat *statbuf) { 107static int
96 char destName[PATH_MAX + 1]; 108cp_mv_Action(const char *fileName, struct stat *statbuf)
97 size_t destLen; 109{
98 const char *srcBasename; 110 char destName[PATH_MAX + 1];
111 size_t destLen;
112 const char *srcBasename;
113 char *name;
99 114
100 strcpy(destName, baseDestName); 115 strcpy(destName, baseDestName);
101 destLen = strlen(destName); 116 destLen = strlen(destName);
102 117
103 if (srcDirFlag == TRUE) { 118 if (srcDirFlag == TRUE) {
104 if (recursiveFlag == FALSE) { 119 if (recursiveFlag == FALSE) {
105 fprintf(stderr, omitting_directory, "cp", baseSrcName); 120 fprintf(stderr, omitting_directory, dz, baseSrcName);
106 return TRUE; 121 return TRUE;
107 } 122 }
108 srcBasename = (strstr(fileName, baseSrcName) 123 srcBasename = (strstr(fileName, baseSrcName)
109 + strlen(baseSrcName)); 124 + strlen(baseSrcName));
110 125
111 if (destLen + strlen(srcBasename) > PATH_MAX) { 126 if (destLen + strlen(srcBasename) > PATH_MAX) {
112 fprintf(stderr, name_too_long, "cp"); 127 fprintf(stderr, name_too_long, dz);
128 return FALSE;
129 }
130 strcat(destName, srcBasename);
131 }
132 else if (destDirFlag == TRUE) {
133 fill_baseDest_buf(&destName[0], &destLen);
134 }
135 else {
136 srcBasename = baseSrcName;
137 }
138 if (mv_Action_first_time && (dz_i == is_mv)) {
139 mv_Action_first_time = errno = 0;
140 if (rename(fileName, destName) < 0 && errno != EXDEV) {
141 fprintf(stderr, "%s: rename(%s, %s): %s\n",
142 dz, fileName, destName, strerror(errno));
143 goto do_copyFile; /* Try anyway... */
144 }
145 else if (errno == EXDEV)
146 goto do_copyFile;
147 else
148 longjmp(catch, 1); /* succeeded with rename() */
149 }
150 do_copyFile:
151 if (preserveFlag == TRUE && statbuf->st_nlink > 1) {
152 if (is_in_ino_dev_hashtable(statbuf, &name)) {
153 if (link(name, destName) < 0) {
154 fprintf(stderr, "%s: link(%s, %s): %s\n",
155 dz, name, destName, strerror(errno));
113 return FALSE; 156 return FALSE;
114 } 157 }
115 strcat(destName, srcBasename); 158 return TRUE;
116 } else if (destDirFlag == TRUE) {
117 fill_baseDest_buf(&destName[0], &destLen);
118 } else {
119 srcBasename = baseSrcName;
120 } 159 }
121 return copyFile(fileName, destName, preserveFlag, followLinks); 160 else {
122 } 161 add_to_ino_dev_hashtable(statbuf, destName);
123
124 int rmfileAction(const char *fileName, struct stat *statbuf) {
125 if (unlink(fileName) < 0) {
126 perror(fileName);
127 return FALSE;
128 } 162 }
129 return TRUE;
130 } 163 }
164 return copyFile(fileName, destName, preserveFlag, followLinks);
165}
166
167static int
168rm_Action(const char *fileName, struct stat *statbuf)
169{
170 int status = TRUE;
131 171
132 int rmdirAction(const char *fileName, struct stat *statbuf) { 172 if (S_ISDIR(statbuf->st_mode)) {
133 if (rmdir(fileName) < 0) { 173 if (rmdir(fileName) < 0) {
134 perror(fileName); 174 fprintf(stderr, "%s: rmdir(%s): %s\n", dz, fileName, strerror(errno));
135 return FALSE; 175 status = FALSE;
136 } 176 }
137 return TRUE; 177 } else if (unlink(fileName) < 0) {
178 fprintf(stderr, "%s: unlink(%s): %s\n", dz, fileName, strerror(errno));
179 status = FALSE;
138 } 180 }
181 return status;
182}
139 183
140 if ((dz = strrchr(*argv, '/')) == NULL) 184extern int cp_mv_main(int argc, char **argv)
141 dz = *argv; 185{
142 else 186 dz = *argv; /* already basename'd by busybox.c:main */
143 dz++;
144 if (*dz == 'c' && *(dz + 1) == 'p') 187 if (*dz == 'c' && *(dz + 1) == 'p')
145 dz_i = is_cp; 188 dz_i = is_cp;
146 else 189 else
@@ -199,53 +242,93 @@ extern int cp_mv_main(int argc, char **argv)
199 242
200 while (argc-- > 1) { 243 while (argc-- > 1) {
201 size_t srcLen; 244 size_t srcLen;
202 int flags_memo; 245 volatile int flags_memo;
246 int status;
203 247
204 baseSrcName = *(argv++); 248 baseSrcName = *(argv++);
205 249
206 if ((srcLen = strlen(baseSrcName)) > PATH_MAX) 250 if ((srcLen = strlen(baseSrcName)) > PATH_MAX)
207 goto name_too_long__exit; 251 name_too_long__exit();
208 252
209 if (srcLen == 0) 253 if (srcLen == 0) continue; /* "" */
210 continue;
211 254
212 srcDirFlag = isDirectory(baseSrcName, followLinks, &srcStatBuf); 255 srcDirFlag = isDirectory(baseSrcName, followLinks, &srcStatBuf);
213 256
214 if ((flags_memo = (recursiveFlag == TRUE && 257 if ((flags_memo = (recursiveFlag == TRUE &&
215 srcDirFlag == TRUE && destDirFlag == TRUE))) { 258 srcDirFlag == TRUE && destDirFlag == TRUE))) {
216 if ((destStatBuf.st_ino == srcStatBuf.st_ino) && 259
217 (destStatBuf.st_rdev == srcStatBuf.st_rdev)) { 260 struct stat sb;
218 fprintf(stderr, 261 int state = 0;
219 "%s: Cannot %s `%s' into a subdirectory of itself, `%s/%s'\n", 262 char *pushd, *d, *p;
220 dz, dz, baseSrcName, baseDestName, baseSrcName); 263
221 continue; 264 if ((pushd = getcwd(NULL, PATH_MAX + 1)) == NULL) {
265 fprintf(stderr, "%s: getcwd(): %s\n", dz, strerror(errno));
266 continue;
267 }
268 if (chdir(baseDestName) < 0) {
269 fprintf(stderr, "%s: chdir(%s): %s\n", dz, baseSrcName, strerror(errno));
270 continue;
271 }
272 if ((d = getcwd(NULL, PATH_MAX + 1)) == NULL) {
273 fprintf(stderr, "%s: getcwd(): %s\n", dz, strerror(errno));
274 continue;
275 }
276 while (!state && *d != '\0') {
277 if (stat(d, &sb) < 0) { /* stat not lstat - always dereference targets */
278 fprintf(stderr, "%s: stat(%s) :%s\n", dz, d, strerror(errno));
279 state = -1;
280 continue;
281 }
282 if ((sb.st_ino == srcStatBuf.st_ino) &&
283 (sb.st_dev == srcStatBuf.st_dev)) {
284 fprintf(stderr,
285 "%s: Cannot %s `%s' "
286 "into a subdirectory of itself, `%s/%s'\n",
287 dz, dz, baseSrcName, baseDestName, baseSrcName);
288 state = -1;
289 continue;
222 } 290 }
291 if ((p = strrchr(d, '/')) != NULL) {
292 *p = '\0';
293 }
294 }
295 if (chdir(pushd) < 0) {
296 fprintf(stderr, "%s: chdir(%s): %s\n", dz, pushd, strerror(errno));
297 free(pushd);
298 free(d);
299 continue;
300 }
301 free(pushd);
302 free(d);
303 if (state < 0)
304 continue;
305 else
223 fill_baseDest_buf(baseDestName, &baseDestLen); 306 fill_baseDest_buf(baseDestName, &baseDestLen);
224 } 307 }
225 if (recursiveAction(baseSrcName, 308 status = setjmp(catch);
226 recursiveFlag, followLinks, FALSE, 309 if (status == 0) {
227 fileAction, fileAction) == FALSE) 310 mv_Action_first_time = 1;
228 goto exit_false; 311 if (recursiveAction(baseSrcName,
229 312 recursiveFlag, followLinks, FALSE,
230 if (dz_i == is_mv && 313 cp_mv_Action, cp_mv_Action) == FALSE) goto exit_false;
231 recursiveAction(baseSrcName, 314 if (dz_i == is_mv &&
232 recursiveFlag, followLinks, TRUE, 315 recursiveAction(baseSrcName,
233 rmfileAction, rmdirAction) == FALSE) 316 recursiveFlag, followLinks, TRUE,
234 goto exit_false; 317 rm_Action, rm_Action) == FALSE) goto exit_false;
235 318 }
236 if (flags_memo) 319 if (flags_memo)
237 *(baseDestName + baseDestLen) = '\0'; 320 *(baseDestName + baseDestLen) = '\0';
238 } 321 }
239 322// exit_true:
240 exit TRUE; 323 exit TRUE;
241 324 exit_false:
242 name_too_long__exit:
243 fprintf(stderr, name_too_long, "cp");
244 exit_false:
245 exit FALSE; 325 exit FALSE;
246} 326}
247 327
248// Local Variables: 328/*
249// c-file-style: "linux" 329Local Variables:
250// tab-width: 4 330c-file-style: "linux"
251// End: 331c-basic-offset: 4
332tab-width: 4
333End:
334*/
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-03-24 11:24:29 +0000