[PATCH v2 04/26] copy.c: delete unused code in copy_file()
- selinux preservation code
- make-link code
- delete link dereference code
- non-recursive copy code
- stat no preservation code
- verbose printing code
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
copy.c | 101 +++++------------------------------------------------------------
1 file changed, 7 insertions(+), 94 deletions(-)
diff --git a/copy.c b/copy.c
index 29e9d5b..d24a8ae 100644
--- a/copy.c
+++ b/copy.c
@@ -82,14 +82,7 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
smallint dest_exists = 0;
smallint ovr;
-/* Inverse of cp -d ("cp without -d") */
-#define FLAGS_DEREF (flags & (FILEUTILS_DEREFERENCE + FILEUTILS_DEREFERENCE_L0))
-
- if ((FLAGS_DEREF ? stat : lstat)(source, &source_stat) < 0) {
- /* This may be a dangling symlink.
- * Making [sym]links to dangling symlinks works, so... */
- if (flags & (FILEUTILS_MAKE_SOFTLINK|FILEUTILS_MAKE_HARDLINK))
- goto make_links;
+ if (lstat(source, &source_stat) < 0) {
bb_perror_msg("can't stat '%s'", source);
return -1;
}
@@ -109,35 +102,12 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
dest_exists = 1;
}
-#if ENABLE_SELINUX
- if ((flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) && is_selinux_enabled() > 0) {
- security_context_t con;
- if (lgetfilecon(source, &con) >= 0) {
- if (setfscreatecon(con) < 0) {
- bb_perror_msg("can't set setfscreatecon %s", con);
- freecon(con);
- return -1;
- }
- } else if (errno == ENOTSUP || errno == ENODATA) {
- setfscreatecon_or_die(NULL);
- } else {
- bb_perror_msg("can't lgetfilecon %s", source);
- return -1;
- }
- }
-#endif
-
if (S_ISDIR(source_stat.st_mode)) {
DIR *dp;
const char *tp;
struct dirent *d;
mode_t saved_umask = 0;
- if (!(flags & FILEUTILS_RECUR)) {
- bb_error_msg("omitting directory '%s'", source);
- return -1;
- }
-
/* Did we ever create source ourself before? */
tp = is_in_ino_dev_hashtable(&source_stat);
if (tp) {
@@ -160,8 +130,6 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
saved_umask = umask(0);
mode = source_stat.st_mode;
- if (!(flags & FILEUTILS_PRESERVE_STATUS))
- mode = source_stat.st_mode & ~saved_umask;
/* Allow owner to access new dir (at least for now) */
mode |= S_IRWXU;
if (mkdir(dest, mode) < 0) {
@@ -210,45 +178,17 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
goto preserve_mode_ugid_time;
}
- if (flags & (FILEUTILS_MAKE_SOFTLINK|FILEUTILS_MAKE_HARDLINK)) {
- int (*lf)(const char *oldpath, const char *newpath);
- make_links:
- /* Hmm... maybe
- * if (DEREF && MAKE_SOFTLINK) source = realpath(source) ?
- * (but realpath returns NULL on dangling symlinks...) */
- lf = (flags & FILEUTILS_MAKE_SOFTLINK) ? symlink : link;
- if (lf(source, dest) < 0) {
- ovr = ask_and_unlink(dest, flags);
- if (ovr <= 0)
- return ovr;
- if (lf(source, dest) < 0) {
- bb_perror_msg("can't create link '%s'", dest);
- return -1;
- }
- }
- /* _Not_ jumping to preserve_mode_ugid_time:
- * (sym)links don't have those */
- return 0;
- }
-
- if (/* "cp thing1 thing2" without -R: just open and read() from thing1 */
- !(flags & FILEUTILS_RECUR)
- /* "cp [-opts] regular_file thing2" */
- || S_ISREG(source_stat.st_mode)
- /* DEREF uses stat, which never returns S_ISLNK() == true.
- * So the below is never true: */
- /* || (FLAGS_DEREF && S_ISLNK(source_stat.st_mode)) */
- ) {
+ if (S_ISREG(source_stat.st_mode) ) { /* "cp [-opts] regular_file thing2" */
int src_fd;
int dst_fd;
mode_t new_mode;
- if (!FLAGS_DEREF && S_ISLNK(source_stat.st_mode)) {
+ if (S_ISLNK(source_stat.st_mode)) {
/* "cp -d symlink dst": create a link */
goto dont_cat;
}
- if (ENABLE_FEATURE_PRESERVE_HARDLINKS && !FLAGS_DEREF) {
+ if (ENABLE_FEATURE_PRESERVE_HARDLINKS) {
const char *link_target;
link_target = is_in_ino_dev_hashtable(&source_stat);
if (link_target) {
@@ -295,25 +235,6 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
}
}
-#if ENABLE_SELINUX
- if ((flags & (FILEUTILS_PRESERVE_SECURITY_CONTEXT|FILEUTILS_SET_SECURITY_CONTEXT))
- && is_selinux_enabled() > 0
- ) {
- security_context_t con;
- if (getfscreatecon(&con) == -1) {
- bb_perror_msg("getfscreatecon");
- return -1;
- }
- if (con) {
- if (setfilecon(dest, con) == -1) {
- bb_perror_msg("setfilecon:%s,%s", dest, con);
- freecon(con);
- return -1;
- }
- freecon(con);
- }
- }
-#endif
if (bb_copyfd_eof(src_fd, dst_fd) == -1)
retval = -1;
/* Careful with writing... */
@@ -348,9 +269,8 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
bb_perror_msg("can't create symlink '%s'", dest);
return -1;
}
- if (flags & FILEUTILS_PRESERVE_STATUS)
- if (lchown(dest, source_stat.st_uid, source_stat.st_gid) < 0)
- bb_perror_msg("can't preserve %s of '%s'", "ownership", dest);
+ if (lchown(dest, source_stat.st_uid, source_stat.st_gid) < 0)
+ bb_perror_msg("can't preserve %s of '%s'", "ownership", dest);
}
/* _Not_ jumping to preserve_mode_ugid_time:
* symlinks don't have those */
@@ -370,10 +290,7 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
preserve_mode_ugid_time:
- if (flags & FILEUTILS_PRESERVE_STATUS
- /* Cannot happen: */
- /* && !(flags & (FILEUTILS_MAKE_SOFTLINK|FILEUTILS_MAKE_HARDLINK)) */
- ) {
+ if (1 /*FILEUTILS_PRESERVE_STATUS*/) {
struct timeval times[2];
times[1].tv_sec = times[0].tv_sec = source_stat.st_mtime;
@@ -389,10 +306,6 @@ int FAST_FUNC copy_file(const char *source, const char *dest, int flags)
bb_perror_msg("can't preserve %s of '%s'", "permissions", dest);
}
- if (flags & FILEUTILS_VERBOSE) {
- printf("'%s' -> '%s'\n", source, dest);
- }
-
return retval;
}
#endif
--
2.7.0.377.g4cd97dd
Nguyễn Thái Ngọc Duy <pclouds@gmail.com>