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authorLennart Poettering <lennart@poettering.net>2014-12-26 17:00:39 +0100
committerLennart Poettering <lennart@poettering.net>2014-12-26 19:21:58 +0100
commite6bd041c973c1f4074c3268b23c380ede0d64f19 (patch)
treeff124a1772cf74c42bed0496b69cc9aa880f2be9 /src/shared/copy.c
parentc75f27ea2b483f91d437ebaf8494457dc76f3fd6 (diff)
copy: try top copy atime/time/xattrs when copying files
Diffstat (limited to 'src/shared/copy.c')
-rw-r--r--src/shared/copy.c103
1 files changed, 102 insertions, 1 deletions
diff --git a/src/shared/copy.c b/src/shared/copy.c
index 0c2cdc8d94..92f6e1e114 100644
--- a/src/shared/copy.c
+++ b/src/shared/copy.c
@@ -20,6 +20,7 @@
***/
#include <sys/sendfile.h>
+#include <sys/xattr.h>
#include "util.h"
#include "btrfs-util.h"
@@ -145,6 +146,9 @@ static int fd_copy_regular(int df, const char *from, const struct stat *st, int
if (fchmod(fdt, st->st_mode & 07777) < 0)
r = -errno;
+ (void) copy_times(fdf, fdt);
+ (void) copy_xattr(fdf, fdt);
+
q = close(fdt);
fdt = -1;
@@ -244,6 +248,9 @@ static int fd_copy_directory(
if (fchmod(fdt, st->st_mode & 07777) < 0)
r = -errno;
+
+ (void) copy_times(fdf, fdt);
+ (void) copy_xattr(fdf, fdt);
}
FOREACH_DIRENT(de, d, return -errno) {
@@ -326,6 +333,7 @@ int copy_directory_fd(int dirfd, const char *to, bool merge) {
int copy_file_fd(const char *from, int fdt, bool try_reflink) {
_cleanup_close_ int fdf = -1;
+ int r;
assert(from);
assert(fdt >= 0);
@@ -334,7 +342,12 @@ int copy_file_fd(const char *from, int fdt, bool try_reflink) {
if (fdf < 0)
return -errno;
- return copy_bytes(fdf, fdt, (off_t) -1, try_reflink);
+ r = copy_bytes(fdf, fdt, (off_t) -1, try_reflink);
+
+ (void) copy_times(fdf, fdt);
+ (void) copy_xattr(fdf, fdt);
+
+ return r;
}
int copy_file(const char *from, const char *to, int flags, mode_t mode) {
@@ -361,3 +374,91 @@ int copy_file(const char *from, const char *to, int flags, mode_t mode) {
return 0;
}
+
+int copy_times(int fdf, int fdt) {
+ struct timespec ut[2];
+ struct stat st;
+ usec_t crtime;
+
+ assert(fdf >= 0);
+ assert(fdt >= 0);
+
+ if (fstat(fdf, &st) < 0)
+ return -errno;
+
+ ut[0] = st.st_atim;
+ ut[1] = st.st_mtim;
+
+ if (futimens(fdt, ut) < 0)
+ return -errno;
+
+ if (fd_getcrtime(fdf, &crtime) >= 0)
+ (void) fd_setcrtime(fdt, crtime);
+
+ return 0;
+}
+
+int copy_xattr(int fdf, int fdt) {
+ _cleanup_free_ char *bufa = NULL, *bufb = NULL;
+ size_t sza = 100, szb = 100;
+ ssize_t n;
+ int ret = 0;
+ const char *p;
+
+ for (;;) {
+ bufa = malloc(sza);
+ if (!bufa)
+ return -ENOMEM;
+
+ n = flistxattr(fdf, bufa, sza);
+ if (n == 0)
+ return 0;
+ if (n > 0)
+ break;
+ if (errno != ERANGE)
+ return -errno;
+
+ sza *= 2;
+
+ free(bufa);
+ bufa = NULL;
+ }
+
+ p = bufa;
+ while (n > 0) {
+ size_t l;
+
+ l = strlen(p);
+ assert(l < (size_t) n);
+
+ if (startswith(p, "user.")) {
+ ssize_t m;
+
+ if (!bufb) {
+ bufb = malloc(szb);
+ if (!bufb)
+ return -ENOMEM;
+ }
+
+ m = fgetxattr(fdf, p, bufb, szb);
+ if (m < 0) {
+ if (errno == ERANGE) {
+ szb *= 2;
+ free(bufb);
+ bufb = NULL;
+ continue;
+ }
+
+ return -errno;
+ }
+
+ if (fsetxattr(fdt, p, bufb, m, 0) < 0)
+ ret = -errno;
+ }
+
+ p += l + 1;
+ n -= l + 1;
+ }
+
+ return ret;
+}