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copy_file_chunk uses streams now.

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This commit is contained in:
Glenn L McGrath
2001-04-11 16:23:35 +00:00
parent 5b20d02ea9
commit 4949faf4b2
14 changed files with 269 additions and 274 deletions
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131
libbb/copy_file.c
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@@ -41,49 +41,54 @@
* -Erik Andersen
*/
int
copy_file(const char *srcName, const char *destName,
int setModes, int followLinks, int forceFlag)
copy_file(const char *src_name, const char *dst_name,
int set_modes, int follow_links, int force_flag, int quiet_flag)
{
int rfd;
int wfd;
int status;
FILE *src_file = NULL;
FILE *dst_file = NULL;
struct stat srcStatBuf;
struct stat dstStatBuf;
struct utimbuf times;
int src_status;
int dst_status;
if (followLinks == TRUE)
status = stat(srcName, &srcStatBuf);
else
status = lstat(srcName, &srcStatBuf);
if (follow_links == TRUE) {
src_status = stat(src_name, &srcStatBuf);
dst_status = stat(dst_name, &dstStatBuf);
} else {
src_status = lstat(src_name, &srcStatBuf);
dst_status = lstat(dst_name, &dstStatBuf);
}
if (status < 0) {
perror_msg("%s", srcName);
if (src_status < 0) {
if (!quiet_flag) {
perror_msg("%s", src_name);
}
return FALSE;
}
if (followLinks == TRUE)
status = stat(destName, &dstStatBuf);
else
status = lstat(destName, &dstStatBuf);
if (status < 0 || forceFlag==TRUE) {
unlink(destName);
if ((dst_status < 0) || force_flag) {
unlink(dst_name);
dstStatBuf.st_ino = -1;
dstStatBuf.st_dev = -1;
}
if ((srcStatBuf.st_dev == dstStatBuf.st_dev) &&
(srcStatBuf.st_ino == dstStatBuf.st_ino)) {
error_msg("Copying file \"%s\" to itself", srcName);
if (!quiet_flag) {
error_msg("Copying file \"%s\" to itself", src_name);
}
return FALSE;
}
if (S_ISDIR(srcStatBuf.st_mode)) {
//fprintf(stderr, "copying directory %s to %s\n", srcName, destName);
/* Make sure the directory is writable */
status = mkdir(destName, 0777777 ^ umask(0));
if (status < 0 && errno != EEXIST) {
perror_msg("%s", destName);
dst_status = create_path(dst_name, 0777777 ^ umask(0));
if ((dst_status < 0) && (errno != EEXIST)) {
if (!quiet_flag) {
perror_msg("%s", dst_name);
}
return FALSE;
}
} else if (S_ISLNK(srcStatBuf.st_mode)) {
@@ -92,80 +97,92 @@ copy_file(const char *srcName, const char *destName,
//fprintf(stderr, "copying link %s to %s\n", srcName, destName);
/* Warning: This could possibly truncate silently, to BUFSIZ chars */
link_size = readlink(srcName, &link_val[0], BUFSIZ);
link_size = readlink(src_name, &link_val[0], BUFSIZ);
if (link_size < 0) {
perror_msg("%s", srcName);
if (quiet_flag) {
perror_msg("%s", src_name);
}
return FALSE;
}
link_val[link_size] = '\0';
status = symlink(link_val, destName);
if (status < 0) {
perror_msg("%s", destName);
src_status = symlink(link_val, dst_name);
if (src_status < 0) {
if (!quiet_flag) {
perror_msg("%s", dst_name);
}
return FALSE;
}
#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
if (setModes == TRUE) {
if (set_modes == TRUE) {
/* Try to set owner, but fail silently like GNU cp */
lchown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid);
lchown(dst_name, srcStatBuf.st_uid, srcStatBuf.st_gid);
}
#endif
return TRUE;
} else if (S_ISFIFO(srcStatBuf.st_mode)) {
//fprintf(stderr, "copying fifo %s to %s\n", srcName, destName);
if (mkfifo(destName, 0644) < 0) {
perror_msg("%s", destName);
if (mkfifo(dst_name, 0644) < 0) {
if (!quiet_flag) {
perror_msg("%s", dst_name);
}
return FALSE;
}
} else if (S_ISBLK(srcStatBuf.st_mode) || S_ISCHR(srcStatBuf.st_mode)
|| S_ISSOCK(srcStatBuf.st_mode)) {
//fprintf(stderr, "copying soc, blk, or chr %s to %s\n", srcName, destName);
if (mknod(destName, srcStatBuf.st_mode, srcStatBuf.st_rdev) < 0) {
perror_msg("%s", destName);
if (mknod(dst_name, srcStatBuf.st_mode, srcStatBuf.st_rdev) < 0) {
if (!quiet_flag) {
perror_msg("%s", dst_name);
}
return FALSE;
}
} else if (S_ISREG(srcStatBuf.st_mode)) {
//fprintf(stderr, "copying regular file %s to %s\n", srcName, destName);
rfd = open(srcName, O_RDONLY);
if (rfd < 0) {
perror_msg("%s", srcName);
src_file = fopen(src_name, "r");
if (src_file == NULL) {
if (!quiet_flag) {
perror_msg("%s", src_name);
}
return FALSE;
}
wfd = open(destName, O_WRONLY | O_CREAT | O_TRUNC,
srcStatBuf.st_mode);
if (wfd < 0) {
perror_msg("%s", destName);
close(rfd);
dst_file = fopen(dst_name, "w");
if (dst_file == NULL) {
if (!quiet_flag) {
perror_msg("%s", dst_name);
}
fclose(src_file);
return FALSE;
}
if (copy_file_chunk(rfd, wfd, srcStatBuf.st_size)==FALSE)
goto error_exit;
close(rfd);
if (close(wfd) < 0) {
if (copy_file_chunk(src_file, dst_file, srcStatBuf.st_size)==FALSE) {
goto error_exit;
}
fclose(src_file);
if (fclose(dst_file) < 0) {
return FALSE;
}
}
if (setModes == TRUE) {
if (set_modes == TRUE) {
/* This is fine, since symlinks never get here */
if (chown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid) < 0)
perror_msg_and_die("%s", destName);
if (chmod(destName, srcStatBuf.st_mode) < 0)
perror_msg_and_die("%s", destName);
if (chown(dst_name, srcStatBuf.st_uid, srcStatBuf.st_gid) < 0)
perror_msg("%s", dst_name);
if (chmod(dst_name, srcStatBuf.st_mode) < 0)
perror_msg("%s", dst_name);
times.actime = srcStatBuf.st_atime;
times.modtime = srcStatBuf.st_mtime;
if (utime(destName, &times) < 0)
perror_msg_and_die("%s", destName);
if (utime(dst_name, &times) < 0)
perror_msg("%s", dst_name);
}
return TRUE;
error_exit:
perror_msg("%s", destName);
close(rfd);
close(wfd);
error_exit:
perror_msg("%s", dst_name);
fclose(src_file);
fclose(dst_file);
return FALSE;
}