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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2010 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* Glenn Fowler
* AT&T Research
*
* Tv_t conversion support
*/
#if defined(__STDPP__directive) && defined(__STDPP__hide)
__STDPP__directive pragma pp:hide utime
#else
#define utime ______utime
#endif
#ifndef _ATFILE_SOURCE
#define _ATFILE_SOURCE 1
#endif
#include <ast.h>
#include <ls.h>
#include <tv.h>
#include <times.h>
#include <error.h>
#include "FEATURE/tvlib"
#if _hdr_utime && _lib_utime
#include <utime.h>
#endif
#if defined(__STDPP__directive) && defined(__STDPP__hide)
__STDPP__directive pragma pp:nohide utime
#else
#undef utime
#endif
#if _lib_utime
#if _hdr_utime
extern int utime(const char*, const struct utimbuf*);
#else
extern int utime(const char*, const time_t*);
#endif
#endif
#define NS(n) (((uint32_t)(n))<1000000000L?(n):0)
/*
* touch path <atime,mtime,ctime>
* Tv_t==0 uses current time
* Tv_t==TV_TOUCH_RETAIN retains path value if it exists, current time otherwise
* otherwise it is exact time
* file created if it doesn't exist and (flags&TV_TOUCH_CREATE)
* symlink not followed if (flags&TV_TOUCH_PHYSICAL)
* cv most likely ignored on most implementations
*
* NOTE: when *at() calls are integrated TV_TOUCH_* should be advertized!
*/
#define TV_TOUCH_CREATE 1
#define TV_TOUCH_PHYSICAL 2
#if !defined(UTIME_NOW) || !defined(UTIME_OMIT) || defined(__stub_utimensat)
#undef _lib_utimensat
#endif
int
tvtouch(const char* path, register const Tv_t* av, register const Tv_t* mv, const Tv_t* cv, int flags)
{
int fd;
int mode;
int oerrno;
struct stat st;
Tv_t now;
#if _lib_utimets || _lib_utimensat
struct timespec ts[2];
#endif
#if _lib_utimes
struct timeval am[2];
#else
#if _hdr_utime
struct utimbuf am;
#else
time_t am[2];
#endif
#endif
oerrno = errno;
#if _lib_utimensat
if (!av)
{
ts[0].tv_sec = 0;
ts[0].tv_nsec = UTIME_NOW;
}
else if (av == TV_TOUCH_RETAIN)
{
ts[0].tv_sec = 0;
ts[0].tv_nsec = UTIME_OMIT;
}
else
{
ts[0].tv_sec = av->tv_sec;
ts[0].tv_nsec = NS(av->tv_nsec);
}
if (!mv)
{
ts[1].tv_sec = 0;
ts[1].tv_nsec = UTIME_NOW;
}
else if (mv == TV_TOUCH_RETAIN)
{
ts[1].tv_sec = 0;
ts[1].tv_nsec = UTIME_OMIT;
}
else
{
ts[1].tv_sec = mv->tv_sec;
ts[1].tv_nsec = NS(mv->tv_nsec);
}
if (!cv && av == TV_TOUCH_RETAIN && mv == TV_TOUCH_RETAIN && !stat(path, &st) && !chmod(path, st.st_mode & S_IPERM))
return 0;
if (!utimensat(AT_FDCWD, path, ts[0].tv_nsec == UTIME_NOW && ts[1].tv_nsec == UTIME_NOW ? (struct timespec*)0 : ts, (flags & TV_TOUCH_PHYSICAL) ? AT_SYMLINK_NOFOLLOW : 0))
return 0;
if (errno != ENOSYS)
{
if (errno != ENOENT || !(flags & TV_TOUCH_CREATE))
return -1;
umask(mode = umask(0));
mode = (~mode) & (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
if ((fd = open(path, O_WRONLY|O_CREAT|O_TRUNC, mode)) < 0)
return -1;
close(fd);
errno = oerrno;
if ((ts[0].tv_nsec != UTIME_NOW || ts[1].tv_nsec != UTIME_NOW) && utimensat(AT_FDCWD, path, ts, (flags & TV_TOUCH_PHYSICAL) ? AT_SYMLINK_NOFOLLOW : 0))
return -1;
return 0;
}
#endif
if ((av == TV_TOUCH_RETAIN || mv == TV_TOUCH_RETAIN) && stat(path, &st))
{
errno = oerrno;
if (av == TV_TOUCH_RETAIN)
av = 0;
if (mv == TV_TOUCH_RETAIN)
mv = 0;
}
if (!av || !mv)
{
tvgettime(&now);
if (!av)
av = (const Tv_t*)&now;
if (!mv)
mv = (const Tv_t*)&now;
}
#if _lib_utimets
if (av == TV_TOUCH_RETAIN)
{
ts[0].tv_sec = st.st_atime;
ts[0].tv_nsec = ST_ATIME_NSEC_GET(&st);
}
else
{
ts[0].tv_sec = av->tv_sec;
ts[0].tv_nsec = NS(av->tv_nsec);
}
if (mv == TV_TOUCH_RETAIN)
{
ts[1].tv_sec = st.st_mtime;
ts[1].tv_nsec = ST_MTIME_NSEC_GET(&st);
}
else
{
ts[1].tv_sec = mv->tv_sec;
ts[1].tv_nsec = NS(mv->tv_nsec);
}
if (!utimets(path, ts))
return 0;
if (errno != ENOENT && av == (const Tv_t*)&now && mv == (const Tv_t*)&now && !utimets(path, NiL))
{
errno = oerrno;
return 0;
}
#else
#if _lib_utimes
if (av == TV_TOUCH_RETAIN)
{
am[0].tv_sec = st.st_atime;
am[0].tv_usec = ST_ATIME_NSEC_GET(&st) / 1000;
}
else
{
am[0].tv_sec = av->tv_sec;
am[0].tv_usec = NS(av->tv_nsec) / 1000;
}
if (mv == TV_TOUCH_RETAIN)
{
am[1].tv_sec = st.st_mtime;
am[1].tv_usec = ST_MTIME_NSEC_GET(&st) / 1000;
}
else
{
am[1].tv_sec = mv->tv_sec;
am[1].tv_usec = NS(mv->tv_nsec) / 1000;
}
if (!utimes(path, am))
return 0;
if (errno != ENOENT && av == (const Tv_t*)&now && mv == (const Tv_t*)&now && !utimes(path, NiL))
{
errno = oerrno;
return 0;
}
#else
#if _lib_utime
am.actime = (av == TV_TOUCH_RETAIN) ? st.st_atime : av->tv_sec;
am.modtime = (mv == TV_TOUCH_RETAIN) ? st.st_mtime : mv->tv_sec;
if (!utime(path, &am))
return 0;
#if _lib_utime_now
if (errno != ENOENT && av == (const Tv_t*)&now && mv == (const Tv_t*)&now && !utime(path, NiL))
{
errno = oerrno;
return 0;
}
#endif
#endif
#endif
if (!access(path, F_OK))
{
if (av != (const Tv_t*)&now || mv != (const Tv_t*)&now)
{
errno = EINVAL;
return -1;
}
if ((fd = open(path, O_RDWR)) >= 0)
{
char c;
if (read(fd, &c, 1) == 1)
{
if (c = (lseek(fd, 0L, 0) == 0L && write(fd, &c, 1) == 1))
errno = oerrno;
close(fd);
if (c)
return 0;
}
close(fd);
}
}
#endif
if (errno != ENOENT || !(flags & TV_TOUCH_CREATE))
return -1;
umask(mode = umask(0));
mode = (~mode) & (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
if ((fd = open(path, O_WRONLY|O_CREAT|O_TRUNC, mode)) < 0)
return -1;
close(fd);
errno = oerrno;
if (av == (const Tv_t*)&now && mv == (const Tv_t*)&now)
return 0;
#if _lib_utimets
return utimets(path, am);
#else
#if _lib_utimes
return utimes(path, am);
#else
#if _lib_utime
return utime(path, &am);
#else
errno = EINVAL;
return -1;
#endif
#endif
#endif
}
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