version 1.1.1.1.2.1, 2013/07/22 00:20:21
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version 1.1.1.4, 2021/03/17 00:32:36
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Line 4
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* |
* |
* Copyright (C) 1998 Andrew Tridgell |
* Copyright (C) 1998 Andrew Tridgell |
* Copyright (C) 2002 Martin Pool |
* Copyright (C) 2002 Martin Pool |
* Copyright (C) 2003-2009 Wayne Davison | * Copyright (C) 2003-2020 Wayne Davison |
* |
* |
* This program is free software; you can redistribute it and/or modify |
* This program is free software; you can redistribute it and/or modify |
* it under the terms of the GNU General Public License as published by |
* it under the terms of the GNU General Public License as published by |
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Line 29
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#include <sys/attr.h> |
#include <sys/attr.h> |
#endif |
#endif |
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#if defined HAVE_SYS_FALLOCATE && !defined HAVE_FALLOCATE |
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#include <sys/syscall.h> |
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#endif |
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extern int dry_run; |
extern int dry_run; |
extern int am_root; |
extern int am_root; |
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extern int am_sender; |
extern int read_only; |
extern int read_only; |
extern int list_only; |
extern int list_only; |
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extern int force_change; |
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extern int inplace; |
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extern int preallocate_files; |
extern int preserve_perms; |
extern int preserve_perms; |
extern int preserve_executability; |
extern int preserve_executability; |
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extern int open_noatime; |
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int direct_io = 0; |
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#ifndef S_BLKSIZE |
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# if defined hpux || defined __hpux__ || defined __hpux |
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# define S_BLKSIZE 1024 |
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# elif defined _AIX && defined _I386 |
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# define S_BLKSIZE 4096 |
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# else |
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# define S_BLKSIZE 512 |
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# endif |
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#endif |
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#ifdef SUPPORT_CRTIMES |
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#pragma pack(push, 4) |
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struct create_time { |
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uint32 length; |
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struct timespec crtime; |
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}; |
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#pragma pack(pop) |
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#endif |
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#define RETURN_ERROR_IF(x,e) \ |
#define RETURN_ERROR_IF(x,e) \ |
do { \ |
do { \ |
if (x) { \ |
if (x) { \ |
Line 50 int do_unlink(const char *fname)
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Line 80 int do_unlink(const char *fname)
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{ |
{ |
if (dry_run) return 0; |
if (dry_run) return 0; |
RETURN_ERROR_IF_RO_OR_LO; |
RETURN_ERROR_IF_RO_OR_LO; |
return unlink(fname); | if (unlink(fname) == 0) |
| return 0; |
| #ifdef SUPPORT_FORCE_CHANGE |
| if (force_change && errno == EPERM) { |
| STRUCT_STAT st; |
| |
| if (x_lstat(fname, &st, NULL) == 0 |
| && make_mutable(fname, st.st_mode, st.st_flags, force_change) > 0) { |
| if (unlink(fname) == 0) |
| return 0; |
| undo_make_mutable(fname, st.st_flags); |
| } |
| /* TODO: handle immutable directories */ |
| errno = EPERM; |
| } |
| #endif |
| return -1; |
} |
} |
|
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int do_symlink(const char *fname1, const char *fname2) | #ifdef SUPPORT_LINKS |
| int do_symlink(const char *lnk, const char *fname) |
{ |
{ |
if (dry_run) return 0; |
if (dry_run) return 0; |
RETURN_ERROR_IF_RO_OR_LO; |
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 flags = O_WRONLY|O_CREAT|O_TRUNC; |
| |
| if (direct_io) |
| flags |= O_DIRECT; |
| |
| int fd = open(fname, flags, 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, fname); |
} |
} |
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#ifdef HAVE_LINK | #if defined NO_SYMLINK_XATTRS || defined NO_SYMLINK_USER_XATTRS |
int do_link(const char *fname1, const char *fname2) | ssize_t do_readlink(const char *path, char *buf, size_t bufsiz) |
{ |
{ |
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/* For --fake-super, we read the link from the file. */ |
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if (am_root < 0) { |
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int fd = do_open_nofollow(path, O_RDONLY); |
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if (fd >= 0) { |
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int len = read(fd, buf, bufsiz); |
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close(fd); |
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return len; |
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} |
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if (errno != ELOOP) |
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return -1; |
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/* A real symlink needs to be turned into a fake one on the receiving |
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* side, so tell the generator that the link has no length. */ |
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if (!am_sender) |
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return 0; |
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/* Otherwise fall through and let the sender report the real length. */ |
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} |
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return readlink(path, buf, bufsiz); |
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} |
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#endif |
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#endif |
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#if defined HAVE_LINK || defined HAVE_LINKAT |
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int do_link(const char *old_path, const char *new_path) |
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{ |
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int st; |
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if (dry_run) return 0; |
if (dry_run) return 0; |
RETURN_ERROR_IF_RO_OR_LO; |
RETURN_ERROR_IF_RO_OR_LO; |
return link(fname1, fname2); | #ifdef HAVE_LINKAT |
| st = linkat(AT_FDCWD, old_path, AT_FDCWD, new_path, 0); |
| #else |
| st = link(old_path, new_path); |
| #endif |
| if (/*soften_links &&*/ st != 0 && errno == EXDEV) |
| st = symlink(old_path, new_path); |
| return st; |
} |
} |
#endif |
#endif |
|
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int do_lchown(const char *path, uid_t owner, gid_t group) | int do_clone(const char *old_path, const char *new_path, mode_t mode) |
{ |
{ |
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#ifdef FICLONE |
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int ifd, ofd, ret, save_errno; |
|
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if (dry_run) return 0; |
if (dry_run) return 0; |
RETURN_ERROR_IF_RO_OR_LO; |
RETURN_ERROR_IF_RO_OR_LO; |
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if ((ifd = do_open(old_path, O_RDONLY, 0)) < 0) { |
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save_errno = errno; |
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rsyserr(FERROR_XFER, errno, "open %s", full_fname(old_path)); |
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errno = save_errno; |
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return -1; |
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} |
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if (robust_unlink(new_path) && errno != ENOENT) { |
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save_errno = errno; |
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rsyserr(FERROR_XFER, errno, "unlink %s", full_fname(new_path)); |
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close(ifd); |
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errno = save_errno; |
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return -1; |
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} |
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mode &= INITACCESSPERMS; |
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if ((ofd = do_open(new_path, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0) { |
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save_errno = errno; |
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rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(new_path)); |
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close(ifd); |
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errno = save_errno; |
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return -1; |
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} |
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ret = ioctl(ofd, FICLONE, ifd); |
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save_errno = errno; |
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close(ifd); |
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close(ofd); |
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if (ret < 0) |
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unlink(new_path); |
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errno = save_errno; |
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return ret; |
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#else |
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(void)old_path; |
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(void)new_path; |
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errno = ENOTSUP; |
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return -1; |
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#endif |
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} |
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int do_lchown(const char *path, uid_t owner, gid_t group, UNUSED(mode_t mode), UNUSED(uint32 fileflags)) |
|
{ |
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if (dry_run) return 0; |
|
RETURN_ERROR_IF_RO_OR_LO; |
#ifndef HAVE_LCHOWN |
#ifndef HAVE_LCHOWN |
#define lchown chown |
#define lchown chown |
#endif |
#endif |
return lchown(path, owner, group); | if (lchown(path, owner, group) == 0) |
| return 0; |
| #ifdef SUPPORT_FORCE_CHANGE |
| if (force_change && errno == EPERM) { |
| if (fileflags == NO_FFLAGS) { |
| STRUCT_STAT st; |
| if (x_lstat(path, &st, NULL) == 0) { |
| mode = st.st_mode; |
| fileflags = st.st_flags; |
| } |
| } |
| if (fileflags != NO_FFLAGS |
| && make_mutable(path, mode, fileflags, force_change) > 0) { |
| int ret = lchown(path, owner, group); |
| undo_make_mutable(path, fileflags); |
| if (ret == 0) |
| return 0; |
| } |
| errno = EPERM; |
| } |
| #endif |
| return -1; |
} |
} |
|
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int do_mknod(const char *pathname, mode_t mode, dev_t dev) |
int do_mknod(const char *pathname, mode_t mode, dev_t dev) |
Line 100 int do_mknod(const char *pathname, mode_t mode, dev_t
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Line 271 int do_mknod(const char *pathname, mode_t mode, dev_t
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if (S_ISSOCK(mode)) { |
if (S_ISSOCK(mode)) { |
int sock; |
int sock; |
struct sockaddr_un saddr; |
struct sockaddr_un saddr; |
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unsigned int len = strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path); |
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if (len >= sizeof saddr.sun_path) { |
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errno = ENAMETOOLONG; |
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return -1; |
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} |
#ifdef HAVE_SOCKADDR_UN_LEN |
#ifdef HAVE_SOCKADDR_UN_LEN |
unsigned int len = | saddr.sun_len = len + 1; |
#endif |
#endif |
strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path); |
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#ifdef HAVE_SOCKADDR_UN_LEN |
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saddr.sun_len = len >= sizeof saddr.sun_path |
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? sizeof saddr.sun_path : len + 1; |
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#endif |
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saddr.sun_family = AF_UNIX; |
saddr.sun_family = AF_UNIX; |
|
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if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0 |
if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0 |
|| (unlink(pathname) < 0 && errno != ENOENT) | || (unlink(pathname) < 0 && errno != ENOENT) |
|| (bind(sock, (struct sockaddr*)&saddr, sizeof saddr)) < 0) | || (bind(sock, (struct sockaddr*)&saddr, sizeof saddr)) < 0) |
return -1; |
return -1; |
close(sock); |
close(sock); |
#ifdef HAVE_CHMOD |
#ifdef HAVE_CHMOD |
return do_chmod(pathname, mode); | return do_chmod(pathname, mode, 0); |
#else |
#else |
return 0; |
return 0; |
#endif |
#endif |
Line 133 int do_rmdir(const char *pathname)
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Line 304 int do_rmdir(const char *pathname)
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{ |
{ |
if (dry_run) return 0; |
if (dry_run) return 0; |
RETURN_ERROR_IF_RO_OR_LO; |
RETURN_ERROR_IF_RO_OR_LO; |
return rmdir(pathname); | if (rmdir(pathname) == 0) |
| return 0; |
| #ifdef SUPPORT_FORCE_CHANGE |
| if (force_change && errno == EPERM) { |
| STRUCT_STAT st; |
| |
| if (x_lstat(pathname, &st, NULL) == 0 |
| && make_mutable(pathname, st.st_mode, st.st_flags, force_change) > 0) { |
| if (rmdir(pathname) == 0) |
| return 0; |
| undo_make_mutable(pathname, st.st_flags); |
| } |
| errno = EPERM; |
| } |
| #endif |
| return -1; |
} |
} |
|
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int do_open(const char *pathname, int flags, mode_t mode) |
int do_open(const char *pathname, int flags, mode_t mode) |
Line 143 int do_open(const char *pathname, int flags, mode_t mo
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Line 329 int do_open(const char *pathname, int flags, mode_t mo
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RETURN_ERROR_IF_RO_OR_LO; |
RETURN_ERROR_IF_RO_OR_LO; |
} |
} |
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#ifdef O_NOATIME |
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if (open_noatime) |
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flags |= O_NOATIME; |
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#endif |
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if (direct_io) |
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flags |= O_DIRECT; |
|
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return open(pathname, flags | O_BINARY, mode); |
return open(pathname, flags | O_BINARY, mode); |
} |
} |
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#ifdef HAVE_CHMOD |
#ifdef HAVE_CHMOD |
int do_chmod(const char *path, mode_t mode) | int do_chmod(const char *path, mode_t mode, UNUSED(uint32 fileflags)) |
{ |
{ |
int code; |
int code; |
if (dry_run) return 0; |
if (dry_run) return 0; |
Line 170 int do_chmod(const char *path, mode_t mode)
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Line 363 int do_chmod(const char *path, mode_t mode)
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} else |
} else |
code = chmod(path, mode & CHMOD_BITS); /* DISCOURAGED FUNCTION */ |
code = chmod(path, mode & CHMOD_BITS); /* DISCOURAGED FUNCTION */ |
#endif /* !HAVE_LCHMOD */ |
#endif /* !HAVE_LCHMOD */ |
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#ifdef SUPPORT_FORCE_CHANGE |
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if (code < 0 && force_change && errno == EPERM && !S_ISLNK(mode)) { |
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if (fileflags == NO_FFLAGS) { |
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STRUCT_STAT st; |
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if (x_lstat(path, &st, NULL) == 0) |
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fileflags = st.st_flags; |
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} |
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if (fileflags != NO_FFLAGS |
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&& make_mutable(path, mode, fileflags, force_change) > 0) { |
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code = chmod(path, mode & CHMOD_BITS); |
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undo_make_mutable(path, fileflags); |
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if (code == 0) |
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return 0; |
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} |
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errno = EPERM; |
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} |
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#endif |
if (code != 0 && (preserve_perms || preserve_executability)) |
if (code != 0 && (preserve_perms || preserve_executability)) |
return code; |
return code; |
return 0; |
return 0; |
} |
} |
#endif |
#endif |
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int do_rename(const char *fname1, const char *fname2) | #ifdef HAVE_CHFLAGS |
| int do_chflags(const char *path, uint32 fileflags) |
{ |
{ |
if (dry_run) return 0; |
if (dry_run) return 0; |
RETURN_ERROR_IF_RO_OR_LO; |
RETURN_ERROR_IF_RO_OR_LO; |
return rename(fname1, fname2); | return chflags(path, fileflags); |
} |
} |
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#endif |
|
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int do_rename(const char *old_path, const char *new_path) |
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{ |
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if (dry_run) return 0; |
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RETURN_ERROR_IF_RO_OR_LO; |
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if (rename(old_path, new_path) == 0) |
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return 0; |
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#ifdef SUPPORT_FORCE_CHANGE |
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if (force_change && errno == EPERM) { |
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STRUCT_STAT st1, st2; |
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int became_mutable; |
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|
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if (x_lstat(old_path, &st1, NULL) != 0) |
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goto failed; |
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became_mutable = make_mutable(old_path, st1.st_mode, st1.st_flags, force_change) > 0; |
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if (became_mutable && rename(old_path, new_path) == 0) |
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goto success; |
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if (x_lstat(new_path, &st2, NULL) == 0 |
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&& make_mutable(new_path, st2.st_mode, st2.st_flags, force_change) > 0) { |
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if (rename(old_path, new_path) == 0) { |
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success: |
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if (became_mutable) /* Yes, use new_path and st1! */ |
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undo_make_mutable(new_path, st1.st_flags); |
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return 0; |
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} |
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undo_make_mutable(new_path, st2.st_flags); |
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} |
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/* TODO: handle immutable directories */ |
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if (became_mutable) |
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undo_make_mutable(old_path, st1.st_flags); |
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failed: |
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errno = EPERM; |
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} |
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#endif |
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return -1; |
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} |
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#ifdef HAVE_FTRUNCATE |
#ifdef HAVE_FTRUNCATE |
int do_ftruncate(int fd, OFF_T size) |
int do_ftruncate(int fd, OFF_T size) |
{ |
{ |
Line 217 void trim_trailing_slashes(char *name)
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Line 465 void trim_trailing_slashes(char *name)
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} |
} |
} |
} |
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int do_mkdir_path(char *fname, mode_t mode) |
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{ |
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char fnametmp[MAXPATHLEN], *fnametmpptr; |
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STRUCT_STAT st; |
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if (fname) { |
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strcpy(fnametmp, fname); |
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if ((fnametmpptr = strrchr(fnametmp, '/')) != NULL) { |
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*fnametmpptr = '\0'; |
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if (do_stat(fnametmp, &st) < 0) |
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do_mkdir_path(fnametmp, mode); |
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} |
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} |
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return do_mkdir(fname, mode); |
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} |
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int do_mkdir(char *fname, mode_t mode) |
int do_mkdir(char *fname, mode_t mode) |
{ |
{ |
if (dry_run) return 0; |
if (dry_run) return 0; |
Line 317 OFF_T do_lseek(int fd, OFF_T offset, int whence)
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Line 549 OFF_T do_lseek(int fd, OFF_T offset, int whence)
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#endif |
#endif |
} |
} |
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#ifdef HAVE_SETATTRLIST |
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int do_setattrlist_times(const char *fname, STRUCT_STAT *stp) |
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{ |
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struct attrlist attrList; |
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struct timespec ts; |
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|
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if (dry_run) return 0; |
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RETURN_ERROR_IF_RO_OR_LO; |
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ts.tv_sec = stp->st_mtime; |
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ts.tv_nsec = stp->ST_MTIME_NSEC; |
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|
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memset(&attrList, 0, sizeof attrList); |
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attrList.bitmapcount = ATTR_BIT_MAP_COUNT; |
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attrList.commonattr = ATTR_CMN_MODTIME; |
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return setattrlist(fname, &attrList, &ts, sizeof ts, FSOPT_NOFOLLOW); |
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} |
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#endif |
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#ifdef SUPPORT_CRTIMES |
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time_t get_create_time(const char *path) |
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{ |
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static struct create_time attrBuf; |
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struct attrlist attrList; |
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|
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memset(&attrList, 0, sizeof attrList); |
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attrList.bitmapcount = ATTR_BIT_MAP_COUNT; |
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attrList.commonattr = ATTR_CMN_CRTIME; |
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if (getattrlist(path, &attrList, &attrBuf, sizeof attrBuf, FSOPT_NOFOLLOW) < 0) |
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return 0; |
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return attrBuf.crtime.tv_sec; |
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} |
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#endif |
|
|
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#ifdef SUPPORT_CRTIMES |
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int set_create_time(const char *path, time_t crtime) |
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{ |
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struct attrlist attrList; |
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struct timespec ts; |
|
|
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if (dry_run) return 0; |
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RETURN_ERROR_IF_RO_OR_LO; |
|
|
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ts.tv_sec = crtime; |
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ts.tv_nsec = 0; |
|
|
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memset(&attrList, 0, sizeof attrList); |
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attrList.bitmapcount = ATTR_BIT_MAP_COUNT; |
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attrList.commonattr = ATTR_CMN_CRTIME; |
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return setattrlist(path, &attrList, &ts, sizeof ts, FSOPT_NOFOLLOW); |
|
} |
|
#endif |
|
|
#ifdef HAVE_UTIMENSAT |
#ifdef HAVE_UTIMENSAT |
int do_utimensat(const char *fname, time_t modtime, uint32 mod_nsec) | int do_utimensat(const char *fname, STRUCT_STAT *stp) |
{ |
{ |
struct timespec t[2]; |
struct timespec t[2]; |
|
|
if (dry_run) return 0; |
if (dry_run) return 0; |
RETURN_ERROR_IF_RO_OR_LO; |
RETURN_ERROR_IF_RO_OR_LO; |
|
|
t[0].tv_sec = 0; | t[0].tv_sec = stp->st_atime; |
t[0].tv_nsec = UTIME_NOW; | #ifdef ST_ATIME_NSEC |
t[1].tv_sec = modtime; | t[0].tv_nsec = stp->ST_ATIME_NSEC; |
t[1].tv_nsec = mod_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, fname, t, AT_SYMLINK_NOFOLLOW); |
return utimensat(AT_FDCWD, fname, t, AT_SYMLINK_NOFOLLOW); |
} |
} |
#endif |
#endif |
|
|
#ifdef HAVE_LUTIMES |
#ifdef HAVE_LUTIMES |
int do_lutimes(const char *fname, time_t modtime, uint32 mod_nsec) | int do_lutimes(const char *fname, STRUCT_STAT *stp) |
{ |
{ |
struct timeval t[2]; |
struct timeval t[2]; |
|
|
if (dry_run) return 0; |
if (dry_run) return 0; |
RETURN_ERROR_IF_RO_OR_LO; |
RETURN_ERROR_IF_RO_OR_LO; |
|
|
t[0].tv_sec = time(NULL); | 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; |
t[0].tv_usec = 0; |
t[1].tv_sec = modtime; | #endif |
t[1].tv_usec = mod_nsec / 1000; | 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(fname, t); |
return lutimes(fname, t); |
} |
} |
#endif |
#endif |
|
|
#ifdef HAVE_UTIMES |
#ifdef HAVE_UTIMES |
int do_utimes(const char *fname, time_t modtime, uint32 mod_nsec) | int do_utimes(const char *fname, STRUCT_STAT *stp) |
{ |
{ |
struct timeval t[2]; |
struct timeval t[2]; |
|
|
if (dry_run) return 0; |
if (dry_run) return 0; |
RETURN_ERROR_IF_RO_OR_LO; |
RETURN_ERROR_IF_RO_OR_LO; |
|
|
t[0].tv_sec = time(NULL); | 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; |
t[0].tv_usec = 0; |
t[1].tv_sec = modtime; | #endif |
t[1].tv_usec = mod_nsec / 1000; | 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(fname, t); |
return utimes(fname, t); |
} |
} |
|
|
#elif defined HAVE_UTIME |
#elif defined HAVE_UTIME |
int do_utime(const char *fname, time_t modtime, UNUSED(uint32 mod_nsec)) | int do_utime(const char *fname, STRUCT_STAT *stp) |
{ |
{ |
#ifdef HAVE_STRUCT_UTIMBUF |
#ifdef HAVE_STRUCT_UTIMBUF |
struct utimbuf tbuf; |
struct utimbuf tbuf; |
Line 377 int do_utime(const char *fname, time_t modtime, UNUSED
|
Line 686 int do_utime(const char *fname, time_t modtime, UNUSED
|
RETURN_ERROR_IF_RO_OR_LO; |
RETURN_ERROR_IF_RO_OR_LO; |
|
|
# ifdef HAVE_STRUCT_UTIMBUF |
# ifdef HAVE_STRUCT_UTIMBUF |
tbuf.actime = time(NULL); | tbuf.actime = stp->st_atime; |
tbuf.modtime = modtime; | tbuf.modtime = stp->st_mtime; |
return utime(fname, &tbuf); |
return utime(fname, &tbuf); |
# else |
# else |
t[0] = time(NULL); | t[0] = stp->st_atime; |
t[1] = modtime; | t[1] = stp->st_mtime; |
return utime(fname, t); |
return utime(fname, t); |
# endif |
# endif |
} |
} |
Line 390 int do_utime(const char *fname, time_t modtime, UNUSED
|
Line 699 int do_utime(const char *fname, time_t modtime, UNUSED
|
#else |
#else |
#error Need utimes or utime function. |
#error Need utimes or utime function. |
#endif |
#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) |
|
{ |
|
#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 |
|
} |
|
|
|
if (direct_io) |
|
flags |= O_DIRECT; |
|
|
|
#ifdef O_NOFOLLOW |
|
fd = open(pathname, flags|O_NOFOLLOW); |
|
#else |
|
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; |
|
} |