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utimens(2) system call

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Variant of utime(2) with struct timespec (with ns precision)
instead of time_t values; also allows for tv_nsec members
the values UTIME_NOW (force update to current time) or
UTIME_OMIT (allow to set either atim or mtim independently.)

Provides a superset of utimes(2), futimes(2), lutimes(2),
and futimens(2).
Provides the same subset of utimensat(2) as does NetBSD 6.
Also import utimens() and lutimeNS() from NetBSD-current.
This commit is contained in:
Antoine Leca 2011-12-24 15:02:54 +01:00 committed by Ben Gras
parent 88414c568c
commit 9131e98a7d
19 changed files with 385 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
include/minix/callnr.h
View file

@ -97,6 +97,7 @@
#define GETPROCNR 104 /* to PM */
#define ISSETUGID 106 /* to PM: ask if process is tainted */
#define GETEPINFO_O 107 /* to PM: get pid/uid/gid of an endpoint */
#define UTIMENS 108 /* to FS: [f]utimens(); also [fl]utimes */
#define SRV_KILL 111 /* to PM: special kill call for RS */
#define GCOV_FLUSH 112 /* flush gcov data from server to gcov files */

6
lib/libc/gen/Makefile.inc
View file

@ -1,4 +1,4 @@
# $NetBSD: Makefile.inc,v 1.184 2012/04/12 22:08:32 christos Exp $
# $NetBSD: Makefile.inc,v 1.185 2012/11/03 19:39:21 christos Exp $
# from: @(#)Makefile.inc 8.6 (Berkeley) 5/4/95
# gen sources
@ -48,8 +48,8 @@ SRCS+= _errno.c alarm.c alphasort.c arc4random.c assert.c basename.c clock.c \
sigset.c sigsetops.c sleep.c \
stringlist.c sysconf.c \
syslog.c telldir.c time.c \
times.c toascii.c tolower_.c ttyname.c ttyslot.c \
toupper_.c ualarm.c ulimit.c uname.c unvis.c usleep.c utime.c utmp.c \
times.c toascii.c tolower_.c ttyname.c ttyslot.c toupper_.c ualarm.c \
ulimit.c uname.c unvis.c usleep.c utime.c utimens.c utmp.c \
utmpx.c valloc.c vis.c wait.c waitpid.c warn.c warnx.c \
vwarn.c vwarnx.c verr.c verrx.c wordexp.c
.endif

53
lib/libc/gen/utimens.c Normal file
View file

@ -0,0 +1,53 @@
/* $NetBSD: utimens.c,v 1.1 2012/11/03 19:39:21 christos Exp $ */
/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: utimens.c,v 1.1 2012/11/03 19:39:21 christos Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#define _INCOMPLETE_XOPEN_C063
#include <fcntl.h>
#include <sys/stat.h>
int
utimens(const char *path, const struct timespec *times)
{
return utimensat(AT_FDCWD, path, times, 0);
}
int
lutimens(const char *path, const struct timespec *times)
{
return utimensat(AT_FDCWD, path, times, AT_SYMLINK_NOFOLLOW);
}

3
lib/libc/sys-minix/MISSING_SYSCALLS
View file

@ -69,9 +69,6 @@ timer_delete
timer_gettime
timer_settime
undelete
utimes
lutimes
futimes
utrace
uuidgen
vadvise

1
lib/libc/sys-minix/Makefile.inc
View file

@ -17,6 +17,7 @@ SRCS+= accept.c access.c adjtime.c bind.c brk.c sbrk.c m_closefrom.c getsid.c \
vectorio.c shutdown.c sigaction.c sigpending.c sigreturn.c sigsuspend.c\
sigprocmask.c socket.c socketpair.c stat.c statvfs.c symlink.c \
sync.c syscall.c sysuname.c truncate.c umask.c unlink.c write.c \
utimensat.c utimes.c futimes.c lutimes.c futimens.c \
_exit.c _ucontext.c environ.c __getcwd.c vfork.c sizeup.c init.c
# Minix specific syscalls.

23
lib/libc/sys-minix/futimens.c Normal file
View file

@ -0,0 +1,23 @@
#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <sys/stat.h>
int futimens(int fd, const struct timespec tv[2])
{
message m;
static const struct timespec now[2] = { {0, UTIME_NOW}, {0, UTIME_NOW} };
if (tv == NULL) tv = now;
m.m2_i1 = fd;
m.m2_l1 = tv[0].tv_sec;
m.m2_l2 = tv[1].tv_sec;
m.m2_i2 = tv[0].tv_nsec;
m.m2_i3 = tv[1].tv_nsec;
m.m2_p1 = NULL;
m.m2_s1 = 0;
return(_syscall(VFS_PROC_NR, UTIMENS, &m));
}

31
lib/libc/sys-minix/futimes.c Normal file
View file

@ -0,0 +1,31 @@
#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <sys/stat.h>
#include <sys/time.h>
#ifdef __weak_alias
__weak_alias(futimes, __futimes50)
#endif
int futimes(int fd, const struct timeval tv[2])
{
message m;
m.m2_i1 = fd;
if (tv == NULL) {
m.m2_l1 = m.m2_l2 = 0;
m.m2_i2 = m.m2_i3 = UTIME_NOW;
}
else {
m.m2_l1 = tv[0].tv_sec;
m.m2_l2 = tv[1].tv_sec;
m.m2_i2 = tv[0].tv_usec * 1000;
m.m2_i3 = tv[1].tv_usec * 1000;
}
m.m2_p1 = NULL;
m.m2_s1 = 0;
return(_syscall(VFS_PROC_NR, UTIMENS, &m));
}

36
lib/libc/sys-minix/lutimes.c Normal file
View file

@ -0,0 +1,36 @@
#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#ifdef __weak_alias
__weak_alias(lutimes, __lutimes50)
#endif
int lutimes(const char *name, const struct timeval tv[2])
{
message m;
if (name == NULL) return EINVAL;
if (name[0] == '\0') return ENOENT; /* X/Open requirement */
m.m2_i1 = strlen(name) + 1;
m.m2_p1 = (char *) __UNCONST(name);
if (tv == NULL) {
m.m2_l1 = m.m2_l2 = 0;
m.m2_i2 = m.m2_i3 = UTIME_NOW;
}
else {
m.m2_l1 = tv[0].tv_sec;
m.m2_l2 = tv[1].tv_sec;
m.m2_i2 = tv[0].tv_usec * 1000;
m.m2_i3 = tv[1].tv_usec * 1000;
}
m.m2_s1 = AT_SYMLINK_NOFOLLOW;
return(_syscall(VFS_PROC_NR, UTIMENS, &m));
}

43
lib/libc/sys-minix/utimensat.c Normal file
View file

@ -0,0 +1,43 @@
#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <limits.h>
#include <errno.h>
/* Implement a very large but not complete subset of the utimensat()
* Posix:2008/XOpen-7 function.
* Are handled the following cases:
* . utimensat(AT_FDCWD, "/some/absolute/path", , )
* . utimensat(AT_FDCWD, "some/path", , )
* . utimensat(fd, "/some/absolute/path", , ) although fd is useless here
* Are not handled the following cases:
* . utimensat(fd, "some/path", , ) path to a file relative to some open fd
*/
int utimensat(int fd, const char *name, const struct timespec tv[2],
int flags)
{
message m;
static const struct timespec now[2] = { {0, UTIME_NOW}, {0, UTIME_NOW} };
if (tv == NULL) tv = now;
if (name == NULL) return EINVAL;
if (name[0] == '\0') return ENOENT; /* POSIX requirement */
if (fd != AT_FDCWD && name[0] != '/') return EINVAL; /* Not supported */
m.m2_i1 = strlen(name) + 1;
m.m2_p1 = (char *) __UNCONST(name);
m.m2_l1 = tv[0].tv_sec;
m.m2_l2 = tv[1].tv_sec;
m.m2_i2 = tv[0].tv_nsec;
m.m2_i3 = tv[1].tv_nsec;
if ((unsigned)flags > SHRT_MAX)
return EINVAL;
else
m.m2_s1 = flags;
return(_syscall(VFS_PROC_NR, UTIMENS, &m));
}

35
lib/libc/sys-minix/utimes.c Normal file
View file

@ -0,0 +1,35 @@
#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <string.h>
#include <errno.h>
#ifdef __weak_alias
__weak_alias(utimes, __utimes50)
#endif
int utimes(const char *name, const struct timeval tv[2])
{
message m;
if (name == NULL) return EINVAL;
if (name[0] == '\0') return ENOENT; /* X/Open requirement */
m.m2_i1 = strlen(name) + 1;
m.m2_p1 = (char *) __UNCONST(name);
if (tv == NULL) {
m.m2_l1 = m.m2_l2 = 0;
m.m2_i2 = m.m2_i3 = UTIME_NOW;
}
else {
m.m2_l1 = tv[0].tv_sec;
m.m2_l2 = tv[1].tv_sec;
m.m2_i2 = tv[0].tv_usec * 1000;
m.m2_i3 = tv[1].tv_usec * 1000;
}
m.m2_s1 = 0;
return(_syscall(VFS_PROC_NR, UTIMENS, &m));
}

2
servers/pm/table.c
View file

@ -119,7 +119,7 @@ int (*call_vec[])(void) = {
no_sys, /* 105 = unused */
do_get, /* 106 = issetugid */
do_getepinfo_o, /* 107 = getepinfo XXX: old implementation*/
no_sys, /* 108 = unused */
no_sys, /* 108 = (utimens) */
no_sys, /* 109 = unused */
no_sys, /* 110 = unused */
do_srv_kill, /* 111 = srv_kill */

4
servers/vfs/param.h
View file

@ -43,6 +43,10 @@
#define utime_file m2_p1
#define utime_length m2_i1
#define utime_strlen m2_i2
#define utimens_fd m2_i1
#define utimens_ansec m2_i2
#define utimens_mnsec m2_i3
#define utimens_flags m2_s1
#define whence m2_i2
#define svrctl_req m2_i1
#define svrctl_argp m2_p1

1
servers/vfs/proto.h
View file

@ -280,6 +280,7 @@ int do_lstat(void);
/* time.c */
int do_utime(void);
int do_utimens(void);
/* tll.c */
void tll_downgrade(tll_t *tllp);

2
servers/vfs/table.c
View file

@ -123,7 +123,7 @@ int (*call_vec[])(void) = {
no_sys, /* 105 = unused */
no_sys, /* 106 = unused */
no_sys, /* 107 = (getepinfo) */
no_sys, /* 108 = unused */
do_utimens, /* 108 = utimens */
no_sys, /* 109 = unused */
no_sys, /* 110 = unused */
no_sys, /* 111 = (srv_kill) */

141
servers/vfs/time.c
View file

@ -2,12 +2,15 @@
*
* The entry points into this file are
* do_utime: perform the UTIME system call
* do_utimens: perform the UTIMENS system call
*/
#include "fs.h"
#include <minix/callnr.h>
#include <minix/com.h>
#include <time.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "file.h"
#include "fproc.h"
#include "path.h"
@ -16,10 +19,13 @@
#include <minix/vfsif.h>
#include "vmnt.h"
#define UTIMENS_STYLE 0 /* utimes(2)/utimensat(2) style, named file */
#define FUTIMENS_STYLE 1 /* futimens(2)/futimes(2) style, file desc. */
/*===========================================================================*
* do_utime *
*===========================================================================*/
int do_utime()
int do_utime(void)
{
/* Perform the utime(name, timep) system call. */
int r;
@ -72,3 +78,136 @@ int do_utime()
put_vnode(vp);
return(r);
}
/*===========================================================================*
* do_utimens *
*===========================================================================*/
int do_utimens(void)
{
/* Perform the utimens(name, times, flag) system call, and its friends.
* Implement a very large but not complete subset of the utimensat()
* Posix:2008/XOpen-7 function.
* Are handled all the following cases:
* . utimensat(AT_FDCWD, "/some/absolute/path", , )
* . utimensat(AT_FDCWD, "some/path", , )
* . utimens("anything", ) really special case of the above two
* . lutimens("anything", ) also really special case of the above
* . utimensat(fd, "/some/absolute/path", , ) although fd is useless here
* . futimens(fd, )
* Are not handled the following cases:
* . utimensat(fd, "some/path", , ) path to a file relative to some open fd
*/
int r, kind, lookup_flags;
struct vnode *vp;
struct filp *filp = NULL; /* initialization required by clueless GCC */
struct vmnt *vmp;
struct timespec actim, modtim, now, newactim, newmodtim;
char fullpath[PATH_MAX];
struct lookup resolve;
vir_bytes vname;
size_t vname_length;
/* The case times==NULL is handled by the caller, replaced with UTIME_NOW */
actim.tv_sec = job_m_in.utime_actime;
actim.tv_nsec = job_m_in.utimens_ansec;
modtim.tv_sec = job_m_in.utime_modtime;
modtim.tv_nsec = job_m_in.utimens_mnsec;
if (job_m_in.utime_file != NULL) {
kind = UTIMENS_STYLE;
if (job_m_in.utimens_flags & ~AT_SYMLINK_NOFOLLOW)
return EINVAL; /* unknown flag */
/* Temporarily open the file */
vname = (vir_bytes) job_m_in.utime_file;
vname_length = (size_t) job_m_in.utime_length;
if (job_m_in.utimens_flags & AT_SYMLINK_NOFOLLOW)
lookup_flags = PATH_RET_SYMLINK;
else
lookup_flags = PATH_NOFLAGS;
lookup_init(&resolve, fullpath, lookup_flags, &vmp, &vp);
resolve.l_vmnt_lock = VMNT_READ;
resolve.l_vnode_lock = VNODE_READ;
/* Temporarily open the file */
if (fetch_name(vname, vname_length, fullpath) != OK) return(err_code);
if ((vp = eat_path(&resolve, fp)) == NULL) return(err_code);
}
else {
kind = FUTIMENS_STYLE;
/* Change timestamps on already-opened fd. Is it valid? */
if (job_m_in.utimens_flags != 0)
return EINVAL; /* unknown flag */
if ((filp = get_filp(job_m_in.utimens_fd, VNODE_READ)) == NULL)
return err_code;
vp = filp->filp_vno;
}
r = OK;
/* Only the owner of a file or the super user can change timestamps. */
if (vp->v_uid != fp->fp_effuid && fp->fp_effuid != SU_UID) r = EPERM;
/* Need write permission (or super user) to 'touch' the file */
if (r != OK && actim.tv_nsec == UTIME_NOW
&& modtim.tv_nsec == UTIME_NOW) r = forbidden(fp, vp, W_BIT);
if (read_only(vp) != OK) r = EROFS; /* Not even su can touch if R/O */
if (r == OK) {
/* Do we need to ask for current time? */
if (actim.tv_nsec == UTIME_NOW
|| actim.tv_nsec == UTIME_OMIT
|| modtim.tv_nsec == UTIME_NOW
|| modtim.tv_nsec == UTIME_OMIT) {
now = clock_timespec();
}
/* Build the request */
switch (actim.tv_nsec) {
case UTIME_NOW:
newactim = now;
break;
case UTIME_OMIT:
newactim.tv_nsec = UTIME_OMIT;
/* Be nice with old FS, put a sensible value in
* otherwise not used field for seconds
*/
newactim.tv_sec = now.tv_sec;
break;
default:
if ( (unsigned)actim.tv_nsec >= 1000000000)
r = EINVAL;
else
newactim = actim;
break;
}
switch (modtim.tv_nsec) {
case UTIME_NOW:
newmodtim = now;
break;
case UTIME_OMIT:
newmodtim.tv_nsec = UTIME_OMIT;
/* Be nice with old FS, put a sensible value */
newmodtim.tv_sec = now.tv_sec;
break;
default:
if ( (unsigned)modtim.tv_nsec >= 1000000000)
r = EINVAL;
else
newmodtim = modtim;
break;
}
}
if (r == OK)
/* Issue request */
r = req_utime(vp->v_fs_e, vp->v_inode_nr, &newactim, &newmodtim);
if (kind == UTIMENS_STYLE) {
/* Close the temporary */
unlock_vnode(vp);
unlock_vmnt(vmp);
put_vnode(vp);
}
else { /* Change timestamps on opened fd. */
unlock_filp(filp);
}
return r;
}

8
sys/sys/fcntl.h
View file

@ -185,14 +185,18 @@ struct flock {
/*
* Constants for X/Open Extended API set 2 (a.k.a. C063)
* linkat(2) - also part of Posix-2008/XPG7
*/
#if defined(_INCOMPLETE_XOPEN_C063) || defined(_KERNEL)
#if (_POSIX_C_SOURCE - 0) >= 200809L || (_XOPEN_SOURCE - 0) >= 700 || \
defined(_NETBSD_SOURCE)
#if defined(_INCOMPLETE_XOPEN_C063) || defined(_KERNEL) || defined(__minix)
#define AT_FDCWD -100 /* Use cwd for relative link target */
#define AT_EACCESS 0x100 /* Use euig/egid for access checks */
#define AT_EACCESS 0x100 /* Use euid/egid for access checks */
#define AT_SYMLINK_NOFOLLOW 0x200 /* Do not follow symlinks */
#define AT_SYMLINK_FOLLOW 0x400 /* Follow symlinks */
#define AT_REMOVEDIR 0x800 /* Remove directory only */
#endif
#endif
#ifndef _KERNEL

2
sys/sys/stat.h
View file

@ -295,7 +295,6 @@ int lchflags(const char *, unsigned long);
int lchmod(const char *, mode_t);
#endif /* defined(_NETBSD_SOURCE) && !defined(__minix) */
#ifndef __minix
#ifndef __LIBC12_SOURCE__
/*
* X/Open Extended API set 2 (a.k.a. C063)
@ -315,7 +314,6 @@ int lutimens(const char *, const struct timespec *);
int futimens(int, const struct timespec *);
#endif
#endif
#endif /* !__minix */
__END_DECLS

5
sys/sys/time.h
View file

@ -283,13 +283,14 @@ int gettimeofday(struct timeval * __restrict, void *__restrict);
int setitimer(int, const struct itimerval * __restrict,
struct itimerval * __restrict) __RENAME(__setitimer50);
#endif /* _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE || _NETBSD_SOURCE */
#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
int utimes(const char *, const struct timeval [2]) __RENAME(__utimes50);
#endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
#if defined(_NETBSD_SOURCE) || defined(HAVE_NBTOOL_CONFIG_H)
int adjtime(const struct timeval *, struct timeval *) __RENAME(__adjtime50);
#ifndef __minix
int futimes(int, const struct timeval [2]) __RENAME(__futimes50);
int lutimes(const char *, const struct timeval [2]) __RENAME(__lutimes50);
#endif /* !__minix */
int settimeofday(const struct timeval * __restrict,
const void *__restrict) __RENAME(__settimeofday50);
#endif /* _NETBSD_SOURCE */

4
usr.sbin/mtree/compare.c
View file

@ -142,10 +142,12 @@ lchown(const char *path, uid_t owner, gid_t group)
#endif
static int
utimes(const char *path, const struct timeval times[2])
fake_utimes(const char *path, const struct timeval times[2])
{
return -1;
}
#undef utimes
#define utimes(path, times) fake_utimes(path, times)
#endif
int