Get rid of some more unused defines and dirs

[elogind.git] / src / shared / copy.c

diff --git a/src/shared/copy.c b/src/shared/copy.c
index 0c2cdc8d9490793d94730904621eae0ad412736f..775a33985613a33c7d5b1e9a51dba1bf236c03ad 100644 (file)
--- 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"
@@ -119,6 +120,7 @@ static int fd_copy_symlink(int df, const char *from, const struct stat *st, int
 
 static int fd_copy_regular(int df, const char *from, const struct stat *st, int dt, const char *to) {
         _cleanup_close_ int fdf = -1, fdt = -1;
+        struct timespec ts[2];
         int r, q;
 
         assert(from);
@@ -145,6 +147,12 @@ 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;
 
+        ts[0] = st->st_atim;
+        ts[1] = st->st_mtim;
+        (void) futimens(fdt, ts);
+
+        (void) copy_xattr(fdf, fdt);
+
         q = close(fdt);
         fdt = -1;
 
@@ -239,11 +247,19 @@ static int fd_copy_directory(
         r = 0;
 
         if (created) {
+                struct timespec ut[2] = {
+                        st->st_atim,
+                        st->st_mtim
+                };
+
                 if (fchown(fdt, st->st_uid, st->st_gid) < 0)
                         r = -errno;
 
                 if (fchmod(fdt, st->st_mode & 07777) < 0)
                         r = -errno;
+
+                (void) futimens(fdt, ut);
+                (void) copy_xattr(dirfd(d), fdt);
         }
 
         FOREACH_DIRENT(de, d, return -errno) {
@@ -269,7 +285,7 @@ static int fd_copy_directory(
                 else if (S_ISBLK(buf.st_mode) || S_ISCHR(buf.st_mode))
                         q = fd_copy_node(dirfd(d), de->d_name, &buf, fdt, de->d_name);
                 else
-                        q = -ENOTSUP;
+                        q = -EOPNOTSUPP;
 
                 if (q == -EEXIST && merge)
                         q = 0;
@@ -301,7 +317,7 @@ int copy_tree_at(int fdf, const char *from, int fdt, const char *to, bool merge)
         else if (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode))
                 return fd_copy_node(fdf, from, &st, fdt, to);
         else
-                return -ENOTSUP;
+                return -EOPNOTSUPP;
 }
 
 int copy_tree(const char *from, const char *to, bool merge) {
@@ -326,6 +342,7 @@ 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);
@@ -334,18 +351,28 @@ 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) {
-        int fdt, r;
+int copy_file(const char *from, const char *to, int flags, mode_t mode, unsigned chattr_flags) {
+        int fdt = -1, r;
 
         assert(from);
         assert(to);
 
-        fdt = open(to, flags|O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, mode);
-        if (fdt < 0)
-                return -errno;
+        RUN_WITH_UMASK(0000) {
+                fdt = open(to, flags|O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, mode);
+                if (fdt < 0)
+                        return -errno;
+        }
+
+        if (chattr_flags != 0)
+                (void) chattr_fd(fdt, true, chattr_flags);
 
         r = copy_file_fd(from, fdt, true);
         if (r < 0) {
@@ -361,3 +388,120 @@ int copy_file(const char *from, const char *to, int flags, mode_t mode) {
 
         return 0;
 }
+
+int copy_file_atomic(const char *from, const char *to, mode_t mode, bool replace, unsigned chattr_flags) {
+        _cleanup_free_ char *t = NULL;
+        int r;
+
+        assert(from);
+        assert(to);
+
+        r = tempfn_random(to, &t);
+        if (r < 0)
+                return r;
+
+        r = copy_file(from, t, O_NOFOLLOW|O_EXCL, mode, chattr_flags);
+        if (r < 0)
+                return r;
+
+        if (replace) {
+                r = renameat(AT_FDCWD, t, AT_FDCWD, to);
+                if (r < 0)
+                        r = -errno;
+        } else
+                r = rename_noreplace(AT_FDCWD, t, AT_FDCWD, to);
+        if (r < 0) {
+                (void) unlink_noerrno(t);
+                return r;
+        }
+
+        return 0;
+}
+
+int copy_times(int fdf, int fdt) {
+        struct timespec ut[2];
+        struct stat st;
+        usec_t crtime = 0;
+
+        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;
+}