+/* vi: set sw=4 ts=4: */
/*
* Mini `cp' and `mv' implementation for BusyBox.
*
#include <utime.h>
#include <dirent.h>
#include <sys/param.h>
+#include <setjmp.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
#define is_cp 0
#define is_mv 1
-static const char *dz; /* dollar zero, .bss */
-static int dz_i; /* index, .bss */
-static const char *cp_mv_usage[] = /* .rodata */
+static int dz_i; /* index into cp_mv_usage */
+static const char *dz; /* dollar zero, .bss */
+static const char *cp_mv_usage[] = /* .rodata */
{
- "cp [OPTION]... SOURCE DEST\n"
- " or: cp [OPTION]... SOURCE... DIRECTORY\n\n"
- "Copy SOURCE to DEST, or multiple SOURCE(s) to DIRECTORY.\n"
- "\n"
- "\t-a\tsame as -dpR\n"
- "\t-d\tpreserve links\n"
- "\t-p\tpreserve file attributes if possible\n"
- "\t-R\tcopy directories recursively\n"
- ,
- "mv SOURCE DEST\n"
- " or: mv SOURCE... DIRECTORY\n\n"
- "Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY.\n"
- "Warning!! This is not GNU `mv'. It does not preserve hard links.\n"
+ "cp [OPTION]... SOURCE DEST\n"
+ " or: cp [OPTION]... SOURCE... DIRECTORY\n"
+#ifndef BB_FEATURE_TRIVIAL_HELP
+ "\nCopies SOURCE to DEST, or multiple SOURCE(s) to DIRECTORY.\n"
+ "\n"
+ "\t-a\tSame as -dpR\n"
+ "\t-d\tPreserves links\n"
+ "\t-p\tPreserves file attributes if possible\n"
+ "\t-f\tforce (implied; ignored) - always set\n"
+ "\t-R\tCopies directories recursively\n"
+#endif
+ ,
+ "mv SOURCE DEST\n"
+ " or: mv SOURCE... DIRECTORY\n"
+#ifndef BB_FEATURE_TRIVIAL_HELP
+ "\nRename SOURCE to DEST, or move SOURCE(s) to DIRECTORY.\n"
+#endif
};
-extern int cp_mv_main(int argc, char **argv)
-{
- __label__ name_too_long__exit;
- __label__ exit_false;
+static int recursiveFlag;
+static int followLinks;
+static int preserveFlag;
+static int forceFlag;
+
+static const char *baseSrcName;
+static int srcDirFlag;
+static struct stat srcStatBuf;
- int recursiveFlag;
- int followLinks;
- int preserveFlag;
+static char baseDestName[BUFSIZ + 1];
+static size_t baseDestLen;
+static int destDirFlag;
+static struct stat destStatBuf;
- const char *baseSrcName;
- int srcDirFlag;
+static jmp_buf catch;
+static volatile int mv_Action_first_time;
- char baseDestName[PATH_MAX + 1];
- size_t baseDestLen;
- int destDirFlag;
+static void name_too_long__exit (void) __attribute__((noreturn));
- void fill_baseDest_buf(char *_buf, size_t *_buflen)
- {
- const char *srcBasename;
- if ((srcBasename = strrchr(baseSrcName, '/')) == NULL)
- {
+static
+void name_too_long__exit (void)
+{
+ fprintf(stderr, name_too_long, dz);
+ exit(FALSE);
+}
+
+static void
+fill_baseDest_buf(char *_buf, size_t * _buflen) {
+ const char *srcBasename;
+ if ((srcBasename = strrchr(baseSrcName, '/')) == NULL) {
srcBasename = baseSrcName;
- if (_buf[*_buflen - 1] != '/')
- {
- if (++(*_buflen) > PATH_MAX)
- goto name_too_long__exit;
- strcat(_buf, "/");
+ if (_buf[*_buflen - 1] != '/') {
+ if (++(*_buflen) > BUFSIZ)
+ name_too_long__exit();
+ strcat(_buf, "/");
}
- }
- if (*_buflen + strlen(srcBasename) > PATH_MAX)
- goto name_too_long__exit;
- strcat(_buf, srcBasename);
- return;
}
+ if (*_buflen + strlen(srcBasename) > BUFSIZ)
+ name_too_long__exit();
+ strcat(_buf, srcBasename);
+ return;
+
+}
+
+static int
+cp_mv_Action(const char *fileName, struct stat *statbuf, void* junk)
+{
+ char destName[BUFSIZ + 1];
+ size_t destLen;
+ const char *srcBasename;
+ char *name;
- int fileAction(const char *fileName, struct stat *statbuf)
- {
- __label__ return_false;
- char destName[PATH_MAX + 1];
- size_t destLen;
- const char *srcBasename;
-
- strcpy(destName, baseDestName);
- destLen = strlen(destName);
-
- if (srcDirFlag == TRUE)
- {
- if (recursiveFlag == FALSE)
- {
- fprintf(stderr, omitting_directory, "cp", baseSrcName);
- return TRUE;
+ strcpy(destName, baseDestName);
+ destLen = strlen(destName);
+
+ if (srcDirFlag == TRUE) {
+ if (recursiveFlag == FALSE) {
+ fprintf(stderr, omitting_directory, dz, baseSrcName);
+ return TRUE;
}
srcBasename = (strstr(fileName, baseSrcName)
- + strlen(baseSrcName));
- if (destLen + strlen(srcBasename) > PATH_MAX)
- {
- fprintf(stderr, name_too_long, "cp");
- goto return_false;
+ + strlen(baseSrcName));
+
+ if (destLen + strlen(srcBasename) > BUFSIZ) {
+ fprintf(stderr, name_too_long, dz);
+ return FALSE;
}
strcat(destName, srcBasename);
- }
- else if (destDirFlag == TRUE)
- {
+ }
+ else if (destDirFlag == TRUE) {
fill_baseDest_buf(&destName[0], &destLen);
- }
- else
- {
+ }
+ else {
srcBasename = baseSrcName;
- }
- return copyFile(fileName, destName, preserveFlag, followLinks);
-
- return_false:
- return FALSE;
}
+ if (mv_Action_first_time && (dz_i == is_mv)) {
+ mv_Action_first_time = errno = 0;
+ if (rename(fileName, destName) < 0 && errno != EXDEV) {
+ fprintf(stderr, "%s: rename(%s, %s): %s\n",
+ dz, fileName, destName, strerror(errno));
+ goto do_copyFile; /* Try anyway... */
+ }
+ else if (errno == EXDEV)
+ goto do_copyFile;
+ else
+ longjmp(catch, 1); /* succeeded with rename() */
+ }
+ do_copyFile:
+ if (preserveFlag == TRUE && statbuf->st_nlink > 1) {
+ if (is_in_ino_dev_hashtable(statbuf, &name)) {
+ if (link(name, destName) < 0) {
+ fprintf(stderr, "%s: link(%s, %s): %s\n",
+ dz, name, destName, strerror(errno));
+ return FALSE;
+ }
+ return TRUE;
+ }
+ else {
+ add_to_ino_dev_hashtable(statbuf, destName);
+ }
+ }
+ return copyFile(fileName, destName, preserveFlag, followLinks, forceFlag);
+}
- int rmfileAction(const char *fileName, struct stat* statbuf)
- {
- if (unlink(fileName) < 0 ) {
- perror(fileName);
- return FALSE;
- }
- return TRUE;
- }
-
- int rmdirAction(const char *fileName, struct stat* statbuf)
- {
- if (rmdir(fileName) < 0 ) {
- perror(fileName);
- return FALSE;
- }
- return TRUE;
- }
-
- if ((dz = strrchr(*argv, '/')) == NULL) dz = *argv; else dz++;
- if (*dz == 'c' && *(dz + 1) == 'p') dz_i = is_cp; else dz_i = is_mv;
- if (argc < 3) usage(cp_mv_usage[dz_i]);
- argc--;
- argv++;
+static int
+rm_Action(const char *fileName, struct stat *statbuf, void* junk)
+{
+ int status = TRUE;
- if (dz_i == is_cp)
- {
- recursiveFlag = preserveFlag = FALSE;
- followLinks = TRUE;
- while (**argv == '-')
- {
- while (*++(*argv))
- {
- switch (**argv)
- {
- case 'a':
- followLinks = FALSE;
- preserveFlag = TRUE;
- recursiveFlag = TRUE;
- break;
- case 'd':
- followLinks = FALSE;
- break;
- case 'p':
- preserveFlag = TRUE;
- break;
- case 'R':
- recursiveFlag = TRUE;
- break;
- default:
- usage(cp_mv_usage[is_cp]);
+ if (S_ISDIR(statbuf->st_mode)) {
+ if (rmdir(fileName) < 0) {
+ fprintf(stderr, "%s: rmdir(%s): %s\n", dz, fileName, strerror(errno));
+ status = FALSE;
}
- }
- argc--;
- argv++;
+ } else if (unlink(fileName) < 0) {
+ fprintf(stderr, "%s: unlink(%s): %s\n", dz, fileName, strerror(errno));
+ status = FALSE;
}
- }
- else /* (dz_i == is_mv) */
- {
- recursiveFlag = preserveFlag = TRUE;
- followLinks = FALSE;
- }
+ return status;
+}
- if (strlen(argv[argc - 1]) > PATH_MAX)
- {
- fprintf(stderr, name_too_long, "cp");
- goto exit_false;
- }
- strcpy(baseDestName, argv[argc - 1]);
- baseDestLen = strlen(baseDestName);
- if (baseDestLen == 0) goto exit_false;
+extern int cp_mv_main(int argc, char **argv)
+{
+ dz = *argv; /* already basename'd by busybox.c:main */
+ if (*dz == 'c' && *(dz + 1) == 'p')
+ dz_i = is_cp;
+ else
+ dz_i = is_mv;
+ if (argc < 3)
+ usage(cp_mv_usage[dz_i]);
+ argc--;
+ argv++;
- destDirFlag = isDirectory(baseDestName, TRUE);
- if ((argc > 3) && destDirFlag == FALSE)
- {
- fprintf(stderr, not_a_directory, "cp", baseDestName);
- goto exit_false;
- }
+ if (dz_i == is_cp) {
+ recursiveFlag = preserveFlag = forceFlag = FALSE;
+ followLinks = TRUE;
+ while (*argv && **argv == '-') {
+ while (*++(*argv)) {
+ switch (**argv) {
+ case 'a':
+ followLinks = FALSE;
+ preserveFlag = TRUE;
+ recursiveFlag = TRUE;
+ break;
+ case 'd':
+ followLinks = FALSE;
+ break;
+ case 'p':
+ preserveFlag = TRUE;
+ break;
+ case 'R':
+ recursiveFlag = TRUE;
+ break;
+ case 'f':
+ forceFlag = TRUE;
+ break;
+ default:
+ usage(cp_mv_usage[is_cp]);
+ }
+ }
+ argc--;
+ argv++;
+ }
+ if (argc < 2) {
+ usage(cp_mv_usage[dz_i]);
+ }
+ } else { /* (dz_i == is_mv) */
+ recursiveFlag = preserveFlag = TRUE;
+ followLinks = FALSE;
+ }
+
- while (argc-- > 1)
- {
- size_t srcLen;
- int flags_memo;
+ if (strlen(argv[argc - 1]) > BUFSIZ) {
+ fprintf(stderr, name_too_long, "cp");
+ goto exit_false;
+ }
+ strcpy(baseDestName, argv[argc - 1]);
+ baseDestLen = strlen(baseDestName);
+ if (baseDestLen == 0)
+ goto exit_false;
- baseSrcName = *(argv++);
+ destDirFlag = isDirectory(baseDestName, TRUE, &destStatBuf);
+ if ((argc > 3) && destDirFlag == FALSE) {
+ fprintf(stderr, not_a_directory, "cp", baseDestName);
+ goto exit_false;
+ }
- if ((srcLen = strlen(baseSrcName)) > PATH_MAX)
- goto name_too_long__exit;
+ while (argc-- > 1) {
+ size_t srcLen;
+ volatile int flags_memo;
+ int status;
- if (srcLen == 0) continue;
+ baseSrcName = *(argv++);
- srcDirFlag = isDirectory(baseSrcName, followLinks);
+ if ((srcLen = strlen(baseSrcName)) > BUFSIZ)
+ name_too_long__exit();
- if ((flags_memo = (recursiveFlag == TRUE &&
- srcDirFlag == TRUE && destDirFlag == TRUE)))
- {
- fill_baseDest_buf(&baseDestName[0], &baseDestLen);
- }
- if (recursiveAction(baseSrcName,
- recursiveFlag, followLinks, FALSE,
- fileAction, fileAction)
- == FALSE) goto exit_false;
+ if (srcLen == 0) continue; /* "" */
- if (dz_i == is_mv &&
- recursiveAction(baseSrcName,
- recursiveFlag, followLinks, TRUE,
- rmfileAction, rmdirAction)
- == FALSE) goto exit_false;
+ srcDirFlag = isDirectory(baseSrcName, followLinks, &srcStatBuf);
- if (flags_memo) *(baseDestName + baseDestLen) = '\0';
- }
+ if ((flags_memo = (recursiveFlag == TRUE &&
+ srcDirFlag == TRUE && destDirFlag == TRUE))) {
- exit TRUE;
+ struct stat sb;
+ int state = 0;
+ char *pushd, *d, *p;
- name_too_long__exit:
- fprintf(stderr, name_too_long, "cp");
+ if ((pushd = getcwd(NULL, BUFSIZ + 1)) == NULL) {
+ fprintf(stderr, "%s: getcwd(): %s\n", dz, strerror(errno));
+ continue;
+ }
+ if (chdir(baseDestName) < 0) {
+ fprintf(stderr, "%s: chdir(%s): %s\n", dz, baseSrcName, strerror(errno));
+ continue;
+ }
+ if ((d = getcwd(NULL, BUFSIZ + 1)) == NULL) {
+ fprintf(stderr, "%s: getcwd(): %s\n", dz, strerror(errno));
+ continue;
+ }
+ while (!state && *d != '\0') {
+ if (stat(d, &sb) < 0) { /* stat not lstat - always dereference targets */
+ fprintf(stderr, "%s: stat(%s) :%s\n", dz, d, strerror(errno));
+ state = -1;
+ continue;
+ }
+ if ((sb.st_ino == srcStatBuf.st_ino) &&
+ (sb.st_dev == srcStatBuf.st_dev)) {
+ fprintf(stderr,
+ "%s: Cannot %s `%s' "
+ "into a subdirectory of itself, `%s/%s'\n",
+ dz, dz, baseSrcName, baseDestName, baseSrcName);
+ state = -1;
+ continue;
+ }
+ if ((p = strrchr(d, '/')) != NULL) {
+ *p = '\0';
+ }
+ }
+ if (chdir(pushd) < 0) {
+ fprintf(stderr, "%s: chdir(%s): %s\n", dz, pushd, strerror(errno));
+ free(pushd);
+ free(d);
+ continue;
+ }
+ free(pushd);
+ free(d);
+ if (state < 0)
+ continue;
+ else
+ fill_baseDest_buf(baseDestName, &baseDestLen);
+ }
+ status = setjmp(catch);
+ if (status == 0) {
+ mv_Action_first_time = 1;
+ if (recursiveAction(baseSrcName,
+ recursiveFlag, followLinks, FALSE,
+ cp_mv_Action, cp_mv_Action, NULL) == FALSE) goto exit_false;
+ if (dz_i == is_mv &&
+ recursiveAction(baseSrcName,
+ recursiveFlag, followLinks, TRUE,
+ rm_Action, rm_Action, NULL) == FALSE) goto exit_false;
+ }
+ if (flags_memo)
+ *(baseDestName + baseDestLen) = '\0';
+ }
+ return( TRUE);
exit_false:
- exit FALSE;
+ return( FALSE);
}
-// Local Variables:
-// c-file-style: "k&r"
-// c-basic-offset: 4
-// End:
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/
projects / oweals / busybox.git / blobdiff