*
* Copyright (C) 1998 Andrew Tridgell
* Copyright (C) 2002 Martin Pool
- * Copyright (C) 2003-2007 Wayne Davison
+ * Copyright (C) 2003-2022 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+ * with this program; if not, visit the http://fsf.org website.
*/
#include "rsync.h"
#if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H
#include <sys/un.h>
#endif
+#ifdef HAVE_SYS_ATTR_H
+#include <sys/attr.h>
+#endif
+
+#if defined HAVE_SYS_FALLOCATE && !defined HAVE_FALLOCATE
+#include <sys/syscall.h>
+#endif
extern int dry_run;
extern int am_root;
+extern int am_sender;
extern int read_only;
extern int list_only;
+extern int inplace;
+extern int preallocate_files;
extern int preserve_perms;
+extern int preserve_executability;
+extern int open_noatime;
+
+#ifndef S_BLKSIZE
+# if defined hpux || defined __hpux__ || defined __hpux
+# define S_BLKSIZE 1024
+# elif defined _AIX && defined _I386
+# define S_BLKSIZE 4096
+# else
+# define S_BLKSIZE 512
+# endif
+#endif
+
+#ifdef SUPPORT_CRTIMES
+#ifdef HAVE_GETATTRLIST
+#pragma pack(push, 4)
+struct create_time {
+ uint32 length;
+ struct timespec crtime;
+};
+#pragma pack(pop)
+#elif defined __CYGWIN__
+#include <windows.h>
+#endif
+#endif
#define RETURN_ERROR_IF(x,e) \
do { \
#define RETURN_ERROR_IF_RO_OR_LO RETURN_ERROR_IF(read_only || list_only, EROFS)
-int do_unlink(const char *fname)
+int do_unlink(const char *path)
{
if (dry_run) return 0;
RETURN_ERROR_IF_RO_OR_LO;
- return unlink(fname);
+ return unlink(path);
}
-int do_symlink(const char *fname1, const char *fname2)
+#ifdef SUPPORT_LINKS
+int do_symlink(const char *lnk, const char *path)
{
if (dry_run) return 0;
RETURN_ERROR_IF_RO_OR_LO;
- return symlink(fname1, fname2);
+
+#if defined NO_SYMLINK_XATTRS || defined NO_SYMLINK_USER_XATTRS
+ /* For --fake-super, we create a normal file with mode 0600
+ * and write the lnk into it. */
+ if (am_root < 0) {
+ int ok, len = strlen(lnk);
+ int fd = open(path, O_WRONLY|O_CREAT|O_TRUNC, S_IWUSR|S_IRUSR);
+ if (fd < 0)
+ return -1;
+ ok = write(fd, lnk, len) == len;
+ if (close(fd) < 0)
+ ok = 0;
+ return ok ? 0 : -1;
+ }
+#endif
+
+ return symlink(lnk, path);
+}
+
+#if defined NO_SYMLINK_XATTRS || defined NO_SYMLINK_USER_XATTRS
+ssize_t do_readlink(const char *path, char *buf, size_t bufsiz)
+{
+ /* For --fake-super, we read the link from the file. */
+ if (am_root < 0) {
+ int fd = do_open_nofollow(path, O_RDONLY);
+ if (fd >= 0) {
+ int len = read(fd, buf, bufsiz);
+ close(fd);
+ return len;
+ }
+ if (errno != ELOOP)
+ return -1;
+ /* A real symlink needs to be turned into a fake one on the receiving
+ * side, so tell the generator that the link has no length. */
+ if (!am_sender)
+ return 0;
+ /* Otherwise fall through and let the sender report the real length. */
+ }
+
+ return readlink(path, buf, bufsiz);
}
+#endif
+#endif
-#ifdef HAVE_LINK
-int do_link(const char *fname1, const char *fname2)
+#if defined HAVE_LINK || defined HAVE_LINKAT
+int do_link(const char *old_path, const char *new_path)
{
if (dry_run) return 0;
RETURN_ERROR_IF_RO_OR_LO;
- return link(fname1, fname2);
+#ifdef HAVE_LINKAT
+ return linkat(AT_FDCWD, old_path, AT_FDCWD, new_path, 0);
+#else
+ return link(old_path, new_path);
+#endif
}
#endif
if (S_ISSOCK(mode)) {
int sock;
struct sockaddr_un saddr;
+ unsigned int len = strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path);
+ if (len >= sizeof saddr.sun_path) {
+ errno = ENAMETOOLONG;
+ return -1;
+ }
#ifdef HAVE_SOCKADDR_UN_LEN
- unsigned int len =
-#endif
- strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path);
-#ifdef HAVE_SOCKADDR_UN_LEN
- saddr.sun_len = len >= sizeof saddr.sun_path
- ? sizeof saddr.sun_path : len + 1;
+ saddr.sun_len = len + 1;
#endif
saddr.sun_family = AF_UNIX;
if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0
- || (unlink(pathname) < 0 && errno != ENOENT)
- || (bind(sock, (struct sockaddr*)&saddr, sizeof saddr)) < 0)
+ || (unlink(pathname) < 0 && errno != ENOENT)
+ || (bind(sock, (struct sockaddr*)&saddr, sizeof saddr)) < 0)
return -1;
close(sock);
#ifdef HAVE_CHMOD
RETURN_ERROR_IF_RO_OR_LO;
}
+#ifdef O_NOATIME
+ if (open_noatime)
+ flags |= O_NOATIME;
+#endif
+
return open(pathname, flags | O_BINARY, mode);
}
#ifdef HAVE_CHMOD
int do_chmod(const char *path, mode_t mode)
{
+ static int switch_step = 0;
int code;
+
if (dry_run) return 0;
RETURN_ERROR_IF_RO_OR_LO;
- if (S_ISLNK(mode)) {
+
+ switch (switch_step) {
#ifdef HAVE_LCHMOD
- code = lchmod(path, mode & CHMOD_BITS);
-#else
- code = 1;
+ case 0:
+ if ((code = lchmod(path, mode & CHMOD_BITS)) == 0)
+ break;
+ if (errno == ENOSYS)
+ switch_step++;
+ else if (errno != ENOTSUP)
+ break;
#endif
- } else
- code = chmod(path, mode & CHMOD_BITS);
- if (code != 0 && preserve_perms)
- return code;
+ /* FALLTHROUGH */
+ default:
+ if (S_ISLNK(mode)) {
+# if defined HAVE_SETATTRLIST
+ struct attrlist attrList;
+ uint32_t m = mode & CHMOD_BITS; /* manpage is wrong: not mode_t! */
+
+ memset(&attrList, 0, sizeof attrList);
+ attrList.bitmapcount = ATTR_BIT_MAP_COUNT;
+ attrList.commonattr = ATTR_CMN_ACCESSMASK;
+ if ((code = setattrlist(path, &attrList, &m, sizeof m, FSOPT_NOFOLLOW)) == 0)
+ break;
+ if (errno == ENOTSUP)
+ code = 1;
+# else
+ code = 1;
+# endif
+ } else
+ code = chmod(path, mode & CHMOD_BITS); /* DISCOURAGED FUNCTION */
+ break;
+ }
+ if (code != 0 && (preserve_perms || preserve_executability))
+ return code;
return 0;
}
#endif
-int do_rename(const char *fname1, const char *fname2)
+int do_rename(const char *old_path, const char *new_path)
+{
+ if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
+ return rename(old_path, new_path);
+}
+
+#ifdef HAVE_FTRUNCATE
+int do_ftruncate(int fd, OFF_T size)
{
+ int ret;
+
if (dry_run) return 0;
RETURN_ERROR_IF_RO_OR_LO;
- return rename(fname1, fname2);
+
+ do {
+ ret = ftruncate(fd, size);
+ } while (ret < 0 && errno == EINTR);
+
+ return ret;
}
+#endif
void trim_trailing_slashes(char *name)
{
}
}
-int do_mkdir(char *fname, mode_t mode)
+int do_mkdir(char *path, mode_t mode)
{
if (dry_run) return 0;
RETURN_ERROR_IF_RO_OR_LO;
- trim_trailing_slashes(fname);
- return mkdir(fname, mode);
+ trim_trailing_slashes(path);
+ return mkdir(path, mode);
}
/* like mkstemp but forces permissions */
{
RETURN_ERROR_IF(dry_run, 0);
RETURN_ERROR_IF(read_only, EROFS);
+ perms |= S_IWUSR;
#if defined HAVE_SECURE_MKSTEMP && defined HAVE_FCHMOD && (!defined HAVE_OPEN64 || defined HAVE_MKSTEMP64)
{
#endif
}
-int do_stat(const char *fname, STRUCT_STAT *st)
+int do_stat(const char *path, STRUCT_STAT *st)
{
#ifdef USE_STAT64_FUNCS
- return stat64(fname, st);
+ return stat64(path, st);
#else
- return stat(fname, st);
+ return stat(path, st);
#endif
}
-int do_lstat(const char *fname, STRUCT_STAT *st)
+int do_lstat(const char *path, STRUCT_STAT *st)
{
#ifdef SUPPORT_LINKS
# ifdef USE_STAT64_FUNCS
- return lstat64(fname, st);
+ return lstat64(path, st);
# else
- return lstat(fname, st);
+ return lstat(path, st);
# endif
#else
- return do_stat(fname, st);
+ return do_stat(path, st);
#endif
}
#endif
}
-char *d_name(struct dirent *di)
+#ifdef HAVE_SETATTRLIST
+int do_setattrlist_times(const char *path, STRUCT_STAT *stp)
+{
+ struct attrlist attrList;
+ struct timespec ts[2];
+
+ if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
+
+ /* Yes, this is in the opposite order of utime and similar. */
+ ts[0].tv_sec = stp->st_mtime;
+ ts[0].tv_nsec = stp->ST_MTIME_NSEC;
+
+ ts[1].tv_sec = stp->st_atime;
+ ts[1].tv_nsec = stp->ST_ATIME_NSEC;
+
+ memset(&attrList, 0, sizeof attrList);
+ attrList.bitmapcount = ATTR_BIT_MAP_COUNT;
+ attrList.commonattr = ATTR_CMN_MODTIME | ATTR_CMN_ACCTIME;
+ return setattrlist(path, &attrList, ts, sizeof ts, FSOPT_NOFOLLOW);
+}
+
+#ifdef SUPPORT_CRTIMES
+int do_setattrlist_crtime(const char *path, time_t crtime)
+{
+ struct attrlist attrList;
+ struct timespec ts;
+
+ if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
+
+ ts.tv_sec = crtime;
+ ts.tv_nsec = 0;
+
+ memset(&attrList, 0, sizeof attrList);
+ attrList.bitmapcount = ATTR_BIT_MAP_COUNT;
+ attrList.commonattr = ATTR_CMN_CRTIME;
+ return setattrlist(path, &attrList, &ts, sizeof ts, FSOPT_NOFOLLOW);
+}
+#endif
+#endif /* HAVE_SETATTRLIST */
+
+#ifdef SUPPORT_CRTIMES
+time_t get_create_time(const char *path, STRUCT_STAT *stp)
+{
+#ifdef HAVE_GETATTRLIST
+ static struct create_time attrBuf;
+ struct attrlist attrList;
+
+ (void)stp;
+ memset(&attrList, 0, sizeof attrList);
+ attrList.bitmapcount = ATTR_BIT_MAP_COUNT;
+ attrList.commonattr = ATTR_CMN_CRTIME;
+ if (getattrlist(path, &attrList, &attrBuf, sizeof attrBuf, FSOPT_NOFOLLOW) < 0)
+ return 0;
+ return attrBuf.crtime.tv_sec;
+#elif defined __CYGWIN__
+ (void)path;
+ return stp->st_birthtime;
+#else
+#error Unknown crtimes implementation
+#endif
+}
+
+#if defined __CYGWIN__
+int do_SetFileTime(const char *path, time_t crtime)
+{
+ if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
+
+ int cnt = MultiByteToWideChar(CP_UTF8, 0, path, -1, NULL, 0);
+ if (cnt == 0)
+ return -1;
+ WCHAR *pathw = new_array(WCHAR, cnt);
+ if (!pathw)
+ return -1;
+ MultiByteToWideChar(CP_UTF8, 0, path, -1, pathw, cnt);
+ HANDLE handle = CreateFileW(pathw, FILE_WRITE_ATTRIBUTES, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+ NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
+ free(pathw);
+ if (handle == INVALID_HANDLE_VALUE)
+ return -1;
+ int64 temp_time = Int32x32To64(crtime, 10000000) + 116444736000000000LL;
+ FILETIME birth_time;
+ birth_time.dwLowDateTime = (DWORD)temp_time;
+ birth_time.dwHighDateTime = (DWORD)(temp_time >> 32);
+ int ok = SetFileTime(handle, &birth_time, NULL, NULL);
+ CloseHandle(handle);
+ return ok ? 0 : -1;
+}
+#endif
+#endif /* SUPPORT_CRTIMES */
+
+#ifdef HAVE_UTIMENSAT
+int do_utimensat(const char *path, STRUCT_STAT *stp)
+{
+ struct timespec t[2];
+
+ if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
+
+ t[0].tv_sec = stp->st_atime;
+#ifdef ST_ATIME_NSEC
+ t[0].tv_nsec = stp->ST_ATIME_NSEC;
+#else
+ t[0].tv_nsec = 0;
+#endif
+ t[1].tv_sec = stp->st_mtime;
+#ifdef ST_MTIME_NSEC
+ t[1].tv_nsec = stp->ST_MTIME_NSEC;
+#else
+ t[1].tv_nsec = 0;
+#endif
+ return utimensat(AT_FDCWD, path, t, AT_SYMLINK_NOFOLLOW);
+}
+#endif
+
+#ifdef HAVE_LUTIMES
+int do_lutimes(const char *path, STRUCT_STAT *stp)
+{
+ struct timeval t[2];
+
+ if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
+
+ t[0].tv_sec = stp->st_atime;
+#ifdef ST_ATIME_NSEC
+ t[0].tv_usec = stp->ST_ATIME_NSEC / 1000;
+#else
+ t[0].tv_usec = 0;
+#endif
+ t[1].tv_sec = stp->st_mtime;
+#ifdef ST_MTIME_NSEC
+ t[1].tv_usec = stp->ST_MTIME_NSEC / 1000;
+#else
+ t[1].tv_usec = 0;
+#endif
+ return lutimes(path, t);
+}
+#endif
+
+#ifdef HAVE_UTIMES
+int do_utimes(const char *path, STRUCT_STAT *stp)
+{
+ struct timeval t[2];
+
+ if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
+
+ t[0].tv_sec = stp->st_atime;
+#ifdef ST_ATIME_NSEC
+ t[0].tv_usec = stp->ST_ATIME_NSEC / 1000;
+#else
+ t[0].tv_usec = 0;
+#endif
+ t[1].tv_sec = stp->st_mtime;
+#ifdef ST_MTIME_NSEC
+ t[1].tv_usec = stp->ST_MTIME_NSEC / 1000;
+#else
+ t[1].tv_usec = 0;
+#endif
+ return utimes(path, t);
+}
+
+#elif defined HAVE_UTIME
+int do_utime(const char *path, STRUCT_STAT *stp)
+{
+#ifdef HAVE_STRUCT_UTIMBUF
+ struct utimbuf tbuf;
+#else
+ time_t t[2];
+#endif
+
+ if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
+
+# ifdef HAVE_STRUCT_UTIMBUF
+ tbuf.actime = stp->st_atime;
+ tbuf.modtime = stp->st_mtime;
+ return utime(path, &tbuf);
+# else
+ t[0] = stp->st_atime;
+ t[1] = stp->st_mtime;
+ return utime(path, t);
+# endif
+}
+
+#else
+#error Need utimes or utime function.
+#endif
+
+#ifdef SUPPORT_PREALLOCATION
+#ifdef FALLOC_FL_KEEP_SIZE
+#define DO_FALLOC_OPTIONS FALLOC_FL_KEEP_SIZE
+#else
+#define DO_FALLOC_OPTIONS 0
+#endif
+
+OFF_T do_fallocate(int fd, OFF_T offset, OFF_T length)
+{
+ int opts = inplace || preallocate_files ? DO_FALLOC_OPTIONS : 0;
+ int ret;
+ RETURN_ERROR_IF(dry_run, 0);
+ RETURN_ERROR_IF_RO_OR_LO;
+ if (length & 1) /* make the length not match the desired length */
+ length++;
+ else
+ length--;
+#if defined HAVE_FALLOCATE
+ ret = fallocate(fd, opts, offset, length);
+#elif defined HAVE_SYS_FALLOCATE
+ ret = syscall(SYS_fallocate, fd, opts, (loff_t)offset, (loff_t)length);
+#elif defined HAVE_EFFICIENT_POSIX_FALLOCATE
+ ret = posix_fallocate(fd, offset, length);
+#else
+#error Coding error in SUPPORT_PREALLOCATION logic.
+#endif
+ if (ret < 0)
+ return ret;
+ if (opts == 0) {
+ STRUCT_STAT st;
+ if (do_fstat(fd, &st) < 0)
+ return length;
+ return st.st_blocks * S_BLKSIZE;
+ }
+ return 0;
+}
+#endif
+
+/* Punch a hole at pos for len bytes. The current file position must be at pos and will be
+ * changed to be at pos + len. */
+int do_punch_hole(int fd, OFF_T pos, OFF_T len)
+{
+#ifdef HAVE_FALLOCATE
+# ifdef HAVE_FALLOC_FL_PUNCH_HOLE
+ if (fallocate(fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, pos, len) == 0) {
+ if (do_lseek(fd, len, SEEK_CUR) != pos + len)
+ return -1;
+ return 0;
+ }
+# endif
+# ifdef HAVE_FALLOC_FL_ZERO_RANGE
+ if (fallocate(fd, FALLOC_FL_ZERO_RANGE, pos, len) == 0) {
+ if (do_lseek(fd, len, SEEK_CUR) != pos + len)
+ return -1;
+ return 0;
+ }
+# endif
+#else
+ (void)pos;
+#endif
+ {
+ char zeros[4096];
+ memset(zeros, 0, sizeof zeros);
+ while (len > 0) {
+ int chunk = len > (int)sizeof zeros ? (int)sizeof zeros : len;
+ int wrote = write(fd, zeros, chunk);
+ if (wrote <= 0) {
+ if (wrote < 0 && errno == EINTR)
+ continue;
+ return -1;
+ }
+ len -= wrote;
+ }
+ }
+ return 0;
+}
+
+int do_open_nofollow(const char *pathname, int flags)
{
-#ifdef HAVE_BROKEN_READDIR
- return (di->d_name - 2);
+#ifndef O_NOFOLLOW
+ STRUCT_STAT f_st, l_st;
+#endif
+ int fd;
+
+ if (flags != O_RDONLY) {
+ RETURN_ERROR_IF(dry_run, 0);
+ RETURN_ERROR_IF_RO_OR_LO;
+#ifndef O_NOFOLLOW
+ /* This function doesn't support write attempts w/o O_NOFOLLOW. */
+ errno = EINVAL;
+ return -1;
+#endif
+ }
+
+#ifdef O_NOFOLLOW
+ fd = open(pathname, flags|O_NOFOLLOW);
#else
- return di->d_name;
+ if (do_lstat(pathname, &l_st) < 0)
+ return -1;
+ if (S_ISLNK(l_st.st_mode)) {
+ errno = ELOOP;
+ return -1;
+ }
+ if ((fd = open(pathname, flags)) < 0)
+ return fd;
+ if (do_fstat(fd, &f_st) < 0) {
+ close_and_return_error:
+ {
+ int save_errno = errno;
+ close(fd);
+ errno = save_errno;
+ }
+ return -1;
+ }
+ if (l_st.st_dev != f_st.st_dev || l_st.st_ino != f_st.st_ino) {
+ errno = EINVAL;
+ goto close_and_return_error;
+ }
#endif
+
+ return fd;
}
git.samba.org / rsync.git / blobdiff