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|
/*
Unix SMB/CIFS implementation.
Samba system utilities
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Jeremy Allison 1998-2002
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
the Free Software Foundation; either version 2 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
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/*
The idea is that this file will eventually have wrappers around all
important system calls in samba. The aims are:
- to enable easier porting by putting OS dependent stuff in here
- to allow for hooks into other "pseudo-filesystems"
- to allow easier integration of things like the japanese extensions
- to support the philosophy of Samba to expose the features of
the OS within the SMB model. In general whatever file/printer/variable
expansions/etc make sense to the OS should be acceptable to Samba.
*/
/*******************************************************************
A wrapper for usleep in case we don't have one.
********************************************************************/
int sys_usleep(long usecs)
{
#ifndef HAVE_USLEEP
struct timeval tval;
#endif
/*
* We need this braindamage as the glibc usleep
* is not SPEC1170 complient... grumble... JRA.
*/
if(usecs < 0 || usecs > 1000000) {
errno = EINVAL;
return -1;
}
#if HAVE_USLEEP
usleep(usecs);
return 0;
#else /* HAVE_USLEEP */
/*
* Fake it with select...
*/
tval.tv_sec = 0;
tval.tv_usec = usecs/1000;
select(0,NULL,NULL,NULL,&tval);
return 0;
#endif /* HAVE_USLEEP */
}
/*******************************************************************
A read wrapper that will deal with EINTR.
********************************************************************/
ssize_t sys_read(int fd, void *buf, size_t count)
{
ssize_t ret;
do {
ret = read(fd, buf, count);
} while (ret == -1 && errno == EINTR);
return ret;
}
/*******************************************************************
A write wrapper that will deal with EINTR.
********************************************************************/
ssize_t sys_write(int fd, const void *buf, size_t count)
{
ssize_t ret;
do {
ret = write(fd, buf, count);
} while (ret == -1 && errno == EINTR);
return ret;
}
/*******************************************************************
A pread wrapper that will deal with EINTR and 64-bit file offsets.
********************************************************************/
#if defined(HAVE_PREAD) || defined(HAVE_PREAD64)
ssize_t sys_pread(int fd, void *buf, size_t count, SMB_OFF_T off)
{
ssize_t ret;
do {
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(HAVE_PREAD64)
ret = pread64(fd, buf, count, off);
#else
ret = pread(fd, buf, count, off);
#endif
} while (ret == -1 && errno == EINTR);
return ret;
}
#endif
/*******************************************************************
A write wrapper that will deal with EINTR and 64-bit file offsets.
********************************************************************/
#if defined(HAVE_PWRITE) || defined(HAVE_PWRITE64)
ssize_t sys_pwrite(int fd, const void *buf, size_t count, SMB_OFF_T off)
{
ssize_t ret;
do {
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(HAVE_PWRITE64)
ret = pwrite64(fd, buf, count, off);
#else
ret = pwrite(fd, buf, count, off);
#endif
} while (ret == -1 && errno == EINTR);
return ret;
}
#endif
/*******************************************************************
A send wrapper that will deal with EINTR.
********************************************************************/
ssize_t sys_send(int s, const void *msg, size_t len, int flags)
{
ssize_t ret;
do {
ret = send(s, msg, len, flags);
} while (ret == -1 && errno == EINTR);
return ret;
}
/*******************************************************************
A sendto wrapper that will deal with EINTR.
********************************************************************/
ssize_t sys_sendto(int s, const void *msg, size_t len, int flags, const struct sockaddr *to, socklen_t tolen)
{
ssize_t ret;
do {
ret = sendto(s, msg, len, flags, to, tolen);
} while (ret == -1 && errno == EINTR);
return ret;
}
/*******************************************************************
A recvfrom wrapper that will deal with EINTR.
********************************************************************/
ssize_t sys_recvfrom(int s, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen)
{
ssize_t ret;
do {
ret = recvfrom(s, buf, len, flags, from, fromlen);
} while (ret == -1 && errno == EINTR);
return ret;
}
/*******************************************************************
A fcntl wrapper that will deal with EINTR.
********************************************************************/
int sys_fcntl_ptr(int fd, int cmd, void *arg)
{
int ret;
do {
ret = fcntl(fd, cmd, arg);
} while (ret == -1 && errno == EINTR);
return ret;
}
/*******************************************************************
A fcntl wrapper that will deal with EINTR.
********************************************************************/
int sys_fcntl_long(int fd, int cmd, long arg)
{
int ret;
do {
ret = fcntl(fd, cmd, arg);
} while (ret == -1 && errno == EINTR);
return ret;
}
/*******************************************************************
A stat() wrapper that will deal with 64 bit filesizes.
********************************************************************/
int sys_stat(const char *fname,SMB_STRUCT_STAT *sbuf)
{
int ret;
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(HAVE_STAT64)
ret = stat64(fname, sbuf);
#else
ret = stat(fname, sbuf);
#endif
/* we always want directories to appear zero size */
if (ret == 0 && S_ISDIR(sbuf->st_mode)) sbuf->st_size = 0;
return ret;
}
/*******************************************************************
An fstat() wrapper that will deal with 64 bit filesizes.
********************************************************************/
int sys_fstat(int fd,SMB_STRUCT_STAT *sbuf)
{
int ret;
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(HAVE_FSTAT64)
ret = fstat64(fd, sbuf);
#else
ret = fstat(fd, sbuf);
#endif
/* we always want directories to appear zero size */
if (ret == 0 && S_ISDIR(sbuf->st_mode)) sbuf->st_size = 0;
return ret;
}
/*******************************************************************
An lstat() wrapper that will deal with 64 bit filesizes.
********************************************************************/
int sys_lstat(const char *fname,SMB_STRUCT_STAT *sbuf)
{
int ret;
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(HAVE_LSTAT64)
ret = lstat64(fname, sbuf);
#else
ret = lstat(fname, sbuf);
#endif
/* we always want directories to appear zero size */
if (ret == 0 && S_ISDIR(sbuf->st_mode)) sbuf->st_size = 0;
return ret;
}
/*******************************************************************
An ftruncate() wrapper that will deal with 64 bit filesizes.
********************************************************************/
int sys_ftruncate(int fd, SMB_OFF_T offset)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(HAVE_FTRUNCATE64)
return ftruncate64(fd, offset);
#else
return ftruncate(fd, offset);
#endif
}
/*******************************************************************
An lseek() wrapper that will deal with 64 bit filesizes.
********************************************************************/
SMB_OFF_T sys_lseek(int fd, SMB_OFF_T offset, int whence)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(HAVE_LSEEK64)
return lseek64(fd, offset, whence);
#else
return lseek(fd, offset, whence);
#endif
}
/*******************************************************************
An fseek() wrapper that will deal with 64 bit filesizes.
********************************************************************/
int sys_fseek(FILE *fp, SMB_OFF_T offset, int whence)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(LARGE_SMB_OFF_T) && defined(HAVE_FSEEK64)
return fseek64(fp, offset, whence);
#elif defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(LARGE_SMB_OFF_T) && defined(HAVE_FSEEKO64)
return fseeko64(fp, offset, whence);
#else
return fseek(fp, offset, whence);
#endif
}
/*******************************************************************
An ftell() wrapper that will deal with 64 bit filesizes.
********************************************************************/
SMB_OFF_T sys_ftell(FILE *fp)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(LARGE_SMB_OFF_T) && defined(HAVE_FTELL64)
return (SMB_OFF_T)ftell64(fp);
#elif defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(LARGE_SMB_OFF_T) && defined(HAVE_FTELLO64)
return (SMB_OFF_T)ftello64(fp);
#else
return (SMB_OFF_T)ftell(fp);
#endif
}
/*******************************************************************
A creat() wrapper that will deal with 64 bit filesizes.
********************************************************************/
int sys_creat(const char *path, mode_t mode)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_CREAT64)
return creat64(path, mode);
#else
/*
* If creat64 isn't defined then ensure we call a potential open64.
* JRA.
*/
return sys_open(path, O_WRONLY | O_CREAT | O_TRUNC, mode);
#endif
}
/*******************************************************************
An open() wrapper that will deal with 64 bit filesizes.
********************************************************************/
int sys_open(const char *path, int oflag, mode_t mode)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OPEN64)
return open64(path, oflag, mode);
#else
return open(path, oflag, mode);
#endif
}
/*******************************************************************
An fopen() wrapper that will deal with 64 bit filesizes.
********************************************************************/
FILE *sys_fopen(const char *path, const char *type)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_FOPEN64)
return fopen64(path, type);
#else
return fopen(path, type);
#endif
}
/*******************************************************************
A readdir wrapper that will deal with 64 bit filesizes.
********************************************************************/
SMB_STRUCT_DIRENT *sys_readdir(DIR *dirp)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_READDIR64)
return readdir64(dirp);
#else
return readdir(dirp);
#endif
}
/*******************************************************************
An mknod() wrapper that will deal with 64 bit filesizes.
********************************************************************/
int sys_mknod(const char *path, mode_t mode, SMB_DEV_T dev)
{
#if defined(HAVE_MKNOD) || defined(HAVE_MKNOD64)
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_MKNOD64) && defined(HAVE_DEV64_T)
return mknod64(path, mode, dev);
#else
return mknod(path, mode, dev);
#endif
#else
/* No mknod system call. */
errno = ENOSYS;
return -1;
#endif
}
/*******************************************************************
Wrapper for realpath.
********************************************************************/
char *sys_realpath(const char *path, char *resolved_path)
{
#if defined(HAVE_REALPATH)
return realpath(path, resolved_path);
#else
/* As realpath is not a system call we can't return ENOSYS. */
errno = EINVAL;
return NULL;
#endif
}
/*******************************************************************
The wait() calls vary between systems
********************************************************************/
int sys_waitpid(pid_t pid,int *status,int options)
{
#ifdef HAVE_WAITPID
return waitpid(pid,status,options);
#else /* HAVE_WAITPID */
return wait4(pid, status, options, NULL);
#endif /* HAVE_WAITPID */
}
/*******************************************************************
System wrapper for getwd
********************************************************************/
char *sys_getwd(char *s)
{
char *wd;
#ifdef HAVE_GETCWD
wd = (char *)getcwd(s, sizeof (pstring));
#else
wd = (char *)getwd(s);
#endif
return wd;
}
/*******************************************************************
system wrapper for symlink
********************************************************************/
int sys_symlink(const char *oldpath, const char *newpath)
{
#ifndef HAVE_SYMLINK
errno = ENOSYS;
return -1;
#else
return symlink(oldpath, newpath);
#endif
}
/*******************************************************************
system wrapper for readlink
********************************************************************/
int sys_readlink(const char *path, char *buf, size_t bufsiz)
{
#ifndef HAVE_READLINK
errno = ENOSYS;
return -1;
#else
return readlink(path, buf, bufsiz);
#endif
}
/*******************************************************************
system wrapper for link
********************************************************************/
int sys_link(const char *oldpath, const char *newpath)
{
#ifndef HAVE_LINK
errno = ENOSYS;
return -1;
#else
return link(oldpath, newpath);
#endif
}
/*******************************************************************
chown isn't used much but OS/2 doesn't have it
********************************************************************/
int sys_chown(const char *fname,uid_t uid,gid_t gid)
{
#ifndef HAVE_CHOWN
static int done;
if (!done) {
DEBUG(1,("WARNING: no chown!\n"));
done=1;
}
errno = ENOSYS;
return -1;
#else
return(chown(fname,uid,gid));
#endif
}
/*******************************************************************
os/2 also doesn't have chroot
********************************************************************/
int sys_chroot(const char *dname)
{
#ifndef HAVE_CHROOT
static int done;
if (!done) {
DEBUG(1,("WARNING: no chroot!\n"));
done=1;
}
errno = ENOSYS;
return -1;
#else
return(chroot(dname));
#endif
}
/**************************************************************************
A wrapper for gethostbyname() that tries avoids looking up hostnames
in the root domain, which can cause dial-on-demand links to come up for no
apparent reason.
****************************************************************************/
struct hostent *sys_gethostbyname(const char *name)
{
#ifdef REDUCE_ROOT_DNS_LOOKUPS
char query[256], hostname[256];
char *domain;
/* Does this name have any dots in it? If so, make no change */
if (strchr_m(name, '.'))
return(gethostbyname(name));
/* Get my hostname, which should have domain name
attached. If not, just do the gethostname on the
original string.
*/
gethostname(hostname, sizeof(hostname) - 1);
hostname[sizeof(hostname) - 1] = 0;
if ((domain = strchr_m(hostname, '.')) == NULL)
return(gethostbyname(name));
/* Attach domain name to query and do modified query.
If names too large, just do gethostname on the
original string.
*/
if((strlen(name) + strlen(domain)) >= sizeof(query))
return(gethostbyname(name));
slprintf(query, sizeof(query)-1, "%s%s", name, domain);
return(gethostbyname(query));
#else /* REDUCE_ROOT_DNS_LOOKUPS */
return(gethostbyname(name));
#endif /* REDUCE_ROOT_DNS_LOOKUPS */
}
#if defined(HAVE_IRIX_SPECIFIC_CAPABILITIES)
/**************************************************************************
Try and abstract process capabilities (for systems that have them).
****************************************************************************/
static BOOL set_process_capability( uint32 cap_flag, BOOL enable )
{
if(cap_flag == KERNEL_OPLOCK_CAPABILITY) {
cap_t cap = cap_get_proc();
if (cap == NULL) {
DEBUG(0,("set_process_capability: cap_get_proc failed. Error was %s\n",
strerror(errno)));
return False;
}
if(enable)
cap->cap_effective |= CAP_NETWORK_MGT;
else
cap->cap_effective &= ~CAP_NETWORK_MGT;
if (cap_set_proc(cap) == -1) {
DEBUG(0,("set_process_capability: cap_set_proc failed. Error was %s\n",
strerror(errno)));
cap_free(cap);
return False;
}
cap_free(cap);
DEBUG(10,("set_process_capability: Set KERNEL_OPLOCK_CAPABILITY.\n"));
}
return True;
}
/**************************************************************************
Try and abstract inherited process capabilities (for systems that have them).
****************************************************************************/
static BOOL set_inherited_process_capability( uint32 cap_flag, BOOL enable )
{
if(cap_flag == KERNEL_OPLOCK_CAPABILITY) {
cap_t cap = cap_get_proc();
if (cap == NULL) {
DEBUG(0,("set_inherited_process_capability: cap_get_proc failed. Error was %s\n",
strerror(errno)));
return False;
}
if(enable)
cap->cap_inheritable |= CAP_NETWORK_MGT;
else
cap->cap_inheritable &= ~CAP_NETWORK_MGT;
if (cap_set_proc(cap) == -1) {
DEBUG(0,("set_inherited_process_capability: cap_set_proc failed. Error was %s\n",
strerror(errno)));
cap_free(cap);
return False;
}
cap_free(cap);
DEBUG(10,("set_inherited_process_capability: Set KERNEL_OPLOCK_CAPABILITY.\n"));
}
return True;
}
#endif
/****************************************************************************
Gain the oplock capability from the kernel if possible.
****************************************************************************/
void oplock_set_capability(BOOL this_process, BOOL inherit)
{
#if HAVE_KERNEL_OPLOCKS_IRIX
set_process_capability(KERNEL_OPLOCK_CAPABILITY,this_process);
set_inherited_process_capability(KERNEL_OPLOCK_CAPABILITY,inherit);
#endif
}
/**************************************************************************
Wrapper for random().
****************************************************************************/
long sys_random(void)
{
#if defined(HAVE_RANDOM)
return (long)random();
#elif defined(HAVE_RAND)
return (long)rand();
#else
DEBUG(0,("Error - no random function available !\n"));
exit(1);
#endif
}
/**************************************************************************
Wrapper for srandom().
****************************************************************************/
void sys_srandom(unsigned int seed)
{
#if defined(HAVE_SRANDOM)
srandom(seed);
#elif defined(HAVE_SRAND)
srand(seed);
#else
DEBUG(0,("Error - no srandom function available !\n"));
exit(1);
#endif
}
/**************************************************************************
Returns equivalent to NGROUPS_MAX - using sysconf if needed.
****************************************************************************/
int groups_max(void)
{
#if defined(SYSCONF_SC_NGROUPS_MAX)
int ret = sysconf(_SC_NGROUPS_MAX);
return (ret == -1) ? NGROUPS_MAX : ret;
#else
return NGROUPS_MAX;
#endif
}
/**************************************************************************
Wrapper for getgroups. Deals with broken (int) case.
****************************************************************************/
int sys_getgroups(int setlen, gid_t *gidset)
{
#if !defined(HAVE_BROKEN_GETGROUPS)
return getgroups(setlen, gidset);
#else
GID_T gid;
GID_T *group_list;
int i, ngroups;
if(setlen == 0) {
return getgroups(setlen, &gid);
}
/*
* Broken case. We need to allocate a
* GID_T array of size setlen.
*/
if(setlen < 0) {
errno = EINVAL;
return -1;
}
if (setlen == 0)
setlen = groups_max();
if((group_list = (GID_T *)malloc(setlen * sizeof(GID_T))) == NULL) {
DEBUG(0,("sys_getgroups: Malloc fail.\n"));
return -1;
}
if((ngroups = getgroups(setlen, group_list)) < 0) {
int saved_errno = errno;
SAFE_FREE(group_list);
errno = saved_errno;
return -1;
}
for(i = 0; i < ngroups; i++)
gidset[i] = (gid_t)group_list[i];
SAFE_FREE(group_list);
return ngroups;
#endif /* HAVE_BROKEN_GETGROUPS */
}
/**************************************************************************
Wrapper for setgroups. Deals with broken (int) case. Automatically used
if we have broken getgroups.
****************************************************************************/
int sys_setgroups(int setlen, gid_t *gidset)
{
#if !defined(HAVE_SETGROUPS)
errno = ENOSYS;
return -1;
#endif /* HAVE_SETGROUPS */
#if !defined(HAVE_BROKEN_GETGROUPS)
return setgroups(setlen, gidset);
#else
GID_T *group_list;
int i ;
if (setlen == 0)
return 0 ;
if (setlen < 0 || setlen > groups_max()) {
errno = EINVAL;
return -1;
}
/*
* Broken case. We need to allocate a
* GID_T array of size setlen.
*/
if((group_list = (GID_T *)malloc(setlen * sizeof(GID_T))) == NULL) {
DEBUG(0,("sys_setgroups: Malloc fail.\n"));
return -1;
}
for(i = 0; i < setlen; i++)
group_list[i] = (GID_T) gidset[i];
if(setgroups(setlen, group_list) != 0) {
int saved_errno = errno;
SAFE_FREE(group_list);
errno = saved_errno;
return -1;
}
SAFE_FREE(group_list);
return 0 ;
#endif /* HAVE_BROKEN_GETGROUPS */
}
/**************************************************************************
Wrappers for setpwent(), getpwent() and endpwent()
****************************************************************************/
void sys_setpwent(void)
{
setpwent();
}
struct passwd *sys_getpwent(void)
{
return getpwent();
}
void sys_endpwent(void)
{
endpwent();
}
/**************************************************************************
Wrappers for getpwnam(), getpwuid(), getgrnam(), getgrgid()
****************************************************************************/
struct passwd *sys_getpwnam(const char *name)
{
return getpwnam(name);
}
struct passwd *sys_getpwuid(uid_t uid)
{
return getpwuid(uid);
}
struct group *sys_getgrnam(const char *name)
{
return getgrnam(name);
}
struct group *sys_getgrgid(gid_t gid)
{
return getgrgid(gid);
}
#if 0 /* NOT CURRENTLY USED - JRA */
/**************************************************************************
The following are the UNICODE versions of *all* system interface functions
called within Samba. Ok, ok, the exceptions are the gethostbyXX calls,
which currently are left as ascii as they are not used other than in name
resolution.
****************************************************************************/
/**************************************************************************
Wide stat. Just narrow and call sys_xxx.
****************************************************************************/
int wsys_stat(const smb_ucs2_t *wfname,SMB_STRUCT_STAT *sbuf)
{
pstring fname;
return sys_stat(unicode_to_unix(fname,wfname,sizeof(fname)), sbuf);
}
/**************************************************************************
Wide lstat. Just narrow and call sys_xxx.
****************************************************************************/
int wsys_lstat(const smb_ucs2_t *wfname,SMB_STRUCT_STAT *sbuf)
{
pstring fname;
return sys_lstat(unicode_to_unix(fname,wfname,sizeof(fname)), sbuf);
}
/**************************************************************************
Wide creat. Just narrow and call sys_xxx.
****************************************************************************/
int wsys_creat(const smb_ucs2_t *wfname, mode_t mode)
{
pstring fname;
return sys_creat(unicode_to_unix(fname,wfname,sizeof(fname)), mode);
}
/**************************************************************************
Wide open. Just narrow and call sys_xxx.
****************************************************************************/
int wsys_open(const smb_ucs2_t *wfname, int oflag, mode_t mode)
{
pstring fname;
return sys_open(unicode_to_unix(fname,wfname,sizeof(fname)), oflag, mode);
}
/**************************************************************************
Wide fopen. Just narrow and call sys_xxx.
****************************************************************************/
FILE *wsys_fopen(const smb_ucs2_t *wfname, const char *type)
{
pstring fname;
return sys_fopen(unicode_to_unix(fname,wfname,sizeof(fname)), type);
}
/**************************************************************************
Wide opendir. Just narrow and call sys_xxx.
****************************************************************************/
DIR *wsys_opendir(const smb_ucs2_t *wfname)
{
pstring fname;
return opendir(unicode_to_unix(fname,wfname,sizeof(fname)));
}
/**************************************************************************
Wide readdir. Return a structure pointer containing a wide filename.
****************************************************************************/
SMB_STRUCT_WDIRENT *wsys_readdir(DIR *dirp)
{
static SMB_STRUCT_WDIRENT retval;
SMB_STRUCT_DIRENT *dirval = sys_readdir(dirp);
if(!dirval)
return NULL;
/*
* The only POSIX defined member of this struct is d_name.
*/
unix_to_unicode(retval.d_name,dirval->d_name,sizeof(retval.d_name));
return &retval;
}
/**************************************************************************
Wide getwd. Call sys_xxx and widen. Assumes s points to a wpstring.
****************************************************************************/
smb_ucs2_t *wsys_getwd(smb_ucs2_t *s)
{
pstring fname;
char *p = sys_getwd(fname);
if(!p)
return NULL;
return unix_to_unicode(s, p, sizeof(wpstring));
}
/**************************************************************************
Wide chown. Just narrow and call sys_xxx.
****************************************************************************/
int wsys_chown(const smb_ucs2_t *wfname, uid_t uid, gid_t gid)
{
pstring fname;
return chown(unicode_to_unix(fname,wfname,sizeof(fname)), uid, gid);
}
/**************************************************************************
Wide chroot. Just narrow and call sys_xxx.
****************************************************************************/
int wsys_chroot(const smb_ucs2_t *wfname)
{
pstring fname;
return chroot(unicode_to_unix(fname,wfname,sizeof(fname)));
}
/**************************************************************************
Wide getpwnam. Return a structure pointer containing wide names.
****************************************************************************/
SMB_STRUCT_WPASSWD *wsys_getpwnam(const smb_ucs2_t *wname)
{
static SMB_STRUCT_WPASSWD retval;
fstring name;
struct passwd *pwret = sys_getpwnam(unicode_to_unix(name,wname,sizeof(name)));
if(!pwret)
return NULL;
unix_to_unicode(retval.pw_name, pwret->pw_name, sizeof(retval.pw_name));
retval.pw_passwd = pwret->pw_passwd;
retval.pw_uid = pwret->pw_uid;
retval.pw_gid = pwret->pw_gid;
unix_to_unicode(retval.pw_gecos, pwret->pw_gecos, sizeof(retval.pw_gecos));
unix_to_unicode(retval.pw_dir, pwret->pw_dir, sizeof(retval.pw_dir));
unix_to_unicode(retval.pw_shell, pwret->pw_shell, sizeof(retval.pw_shell));
return &retval;
}
/**************************************************************************
Wide getpwuid. Return a structure pointer containing wide names.
****************************************************************************/
SMB_STRUCT_WPASSWD *wsys_getpwuid(uid_t uid)
{
static SMB_STRUCT_WPASSWD retval;
struct passwd *pwret = sys_getpwuid(uid);
if(!pwret)
return NULL;
unix_to_unicode(retval.pw_name, pwret->pw_name, sizeof(retval.pw_name));
retval.pw_passwd = pwret->pw_passwd;
retval.pw_uid = pwret->pw_uid;
retval.pw_gid = pwret->pw_gid;
unix_to_unicode(retval.pw_gecos, pwret->pw_gecos, sizeof(retval.pw_gecos));
unix_to_unicode(retval.pw_dir, pwret->pw_dir, sizeof(retval.pw_dir));
unix_to_unicode(retval.pw_shell, pwret->pw_shell, sizeof(retval.pw_shell));
return &retval;
}
#endif /* NOT CURRENTLY USED - JRA */
/**************************************************************************
Extract a command into an arg list. Uses a static pstring for storage.
Caller frees returned arg list (which contains pointers into the static pstring).
****************************************************************************/
static char **extract_args(const char *command)
{
static pstring trunc_cmd;
char *ptr;
int argcl;
char **argl = NULL;
int i;
pstrcpy(trunc_cmd, command);
if(!(ptr = strtok(trunc_cmd, " \t"))) {
errno = EINVAL;
return NULL;
}
/*
* Count the args.
*/
for( argcl = 1; ptr; ptr = strtok(NULL, " \t"))
argcl++;
if((argl = (char **)malloc((argcl + 1) * sizeof(char *))) == NULL)
return NULL;
/*
* Now do the extraction.
*/
pstrcpy(trunc_cmd, command);
ptr = strtok(trunc_cmd, " \t");
i = 0;
argl[i++] = ptr;
while((ptr = strtok(NULL, " \t")) != NULL)
argl[i++] = ptr;
argl[i++] = NULL;
return argl;
}
/**************************************************************************
Wrapper for fork. Ensures that mypid is reset. Used so we can write
a sys_getpid() that only does a system call *once*.
****************************************************************************/
static pid_t mypid = (pid_t)-1;
pid_t sys_fork(void)
{
pid_t forkret = fork();
if (forkret == (pid_t)0) /* Child - reset mypid so sys_getpid does a system call. */
mypid = (pid_t) -1;
return forkret;
}
/**************************************************************************
Wrapper for getpid. Ensures we only do a system call *once*.
****************************************************************************/
pid_t sys_getpid(void)
{
if (mypid == (pid_t)-1)
mypid = getpid();
return mypid;
}
/**************************************************************************
Wrapper for popen. Safer as it doesn't search a path.
Modified from the glibc sources.
modified by tridge to return a file descriptor. We must kick our FILE* habit
****************************************************************************/
typedef struct _popen_list
{
int fd;
pid_t child_pid;
struct _popen_list *next;
} popen_list;
static popen_list *popen_chain;
int sys_popen(const char *command)
{
int parent_end, child_end;
int pipe_fds[2];
popen_list *entry = NULL;
char **argl = NULL;
if (pipe(pipe_fds) < 0)
return -1;
parent_end = pipe_fds[0];
child_end = pipe_fds[1];
if (!*command) {
errno = EINVAL;
goto err_exit;
}
if((entry = (popen_list *)malloc(sizeof(popen_list))) == NULL)
goto err_exit;
ZERO_STRUCTP(entry);
/*
* Extract the command and args into a NULL terminated array.
*/
if(!(argl = extract_args(command)))
goto err_exit;
entry->child_pid = sys_fork();
if (entry->child_pid == -1) {
goto err_exit;
}
if (entry->child_pid == 0) {
/*
* Child !
*/
int child_std_end = STDOUT_FILENO;
popen_list *p;
close(parent_end);
if (child_end != child_std_end) {
dup2 (child_end, child_std_end);
close (child_end);
}
/*
* POSIX.2: "popen() shall ensure that any streams from previous
* popen() calls that remain open in the parent process are closed
* in the new child process."
*/
for (p = popen_chain; p; p = p->next)
close(p->fd);
execv(argl[0], argl);
_exit (127);
}
/*
* Parent.
*/
close (child_end);
SAFE_FREE(argl);
/* Link into popen_chain. */
entry->next = popen_chain;
popen_chain = entry;
entry->fd = parent_end;
return entry->fd;
err_exit:
SAFE_FREE(entry);
SAFE_FREE(argl);
close(pipe_fds[0]);
close(pipe_fds[1]);
return -1;
}
/**************************************************************************
Wrapper for pclose. Modified from the glibc sources.
****************************************************************************/
int sys_pclose(int fd)
{
int wstatus;
popen_list **ptr = &popen_chain;
popen_list *entry = NULL;
pid_t wait_pid;
int status = -1;
/* Unlink from popen_chain. */
for ( ; *ptr != NULL; ptr = &(*ptr)->next) {
if ((*ptr)->fd == fd) {
entry = *ptr;
*ptr = (*ptr)->next;
status = 0;
break;
}
}
if (status < 0 || close(entry->fd) < 0)
return -1;
/*
* As Samba is catching and eating child process
* exits we don't really care about the child exit
* code, a -1 with errno = ECHILD will do fine for us.
*/
do {
wait_pid = sys_waitpid (entry->child_pid, &wstatus, 0);
} while (wait_pid == -1 && errno == EINTR);
SAFE_FREE(entry);
if (wait_pid == -1)
return -1;
return wstatus;
}
/**************************************************************************
Wrappers for dlopen, dlsym, dlclose.
****************************************************************************/
void *sys_dlopen(const char *name, int flags)
{
#if defined(HAVE_DLOPEN)
return dlopen(name, flags);
#else
return NULL;
#endif
}
void *sys_dlsym(void *handle, const char *symbol)
{
#if defined(HAVE_DLSYM)
return dlsym(handle, symbol);
#else
return NULL;
#endif
}
int sys_dlclose (void *handle)
{
#if defined(HAVE_DLCLOSE)
return dlclose(handle);
#else
return 0;
#endif
}
const char *sys_dlerror(void)
{
#if defined(HAVE_DLERROR)
return dlerror();
#else
return NULL;
#endif
}
int sys_dup2(int oldfd, int newfd)
{
#if defined(HAVE_DUP2)
return dup2(oldfd, newfd);
#else
errno = ENOSYS;
return -1;
#endif
}
/**************************************************************************
Wrapper for Admin Logs.
****************************************************************************/
void sys_adminlog(int priority, const char *format_str, ...)
{
va_list ap;
int ret;
char *msgbuf = NULL;
va_start( ap, format_str );
ret = vasprintf( &msgbuf, format_str, ap );
va_end( ap );
if (ret == -1)
return;
#if defined(HAVE_SYSLOG)
syslog( priority, "%s", msgbuf );
#else
DEBUG(0,("%s", msgbuf ));
#endif
SAFE_FREE(msgbuf);
}
/**************************************************************************
Wrappers for extented attribute calls. Based on the Linux package with
support for IRIX also. Expand as other systems have them.
****************************************************************************/
ssize_t sys_getxattr (const char *path, const char *name, void *value, size_t size)
{
#if defined(HAVE_GETXATTR)
return getxattr(path, name, value, size);
#elif defined(HAVE_ATTR_GET)
int retval, flags = 0;
int valuelength = (int)size;
char *attrname = strchr(name,'.') +1;
if (strncmp(name, "system", 6) == 0) flags |= ATTR_ROOT;
retval = attr_get(path, attrname, (char *)value, &valuelength, flags);
return retval ? retval : valuelength;
#else
errno = ENOSYS;
return -1;
#endif
}
ssize_t sys_lgetxattr (const char *path, const char *name, void *value, size_t size)
{
#if defined(HAVE_LGETXATTR)
return lgetxattr(path, name, value, size);
#elif defined(HAVE_ATTR_GET)
int retval, flags = ATTR_DONTFOLLOW;
int valuelength = (int)size;
char *attrname = strchr(name,'.') +1;
if (strncmp(name, "system", 6) == 0) flags |= ATTR_ROOT;
retval = attr_get(path, attrname, (char *)value, &valuelength, flags);
return retval ? retval : valuelength;
#else
errno = ENOSYS;
return -1;
#endif
}
ssize_t sys_fgetxattr (int filedes, const char *name, void *value, size_t size)
{
#if defined(HAVE_FGETXATTR)
return fgetxattr(filedes, name, value, size);
#elif defined(HAVE_ATTR_GETF)
int retval, flags = 0;
int valuelength = (int)size;
char *attrname = strchr(name,'.') +1;
if (strncmp(name, "system", 6) == 0) flags |= ATTR_ROOT;
retval = attr_getf(filedes, attrname, (char *)value, &valuelength, flags);
return retval ? retval : valuelength;
#else
errno = ENOSYS;
return -1;
#endif
}
#if defined(HAVE_ATTR_LIST) && defined(HAVE_SYS_ATTRIBUTES_H)
static char attr_buffer[ATTR_MAX_VALUELEN];
static ssize_t irix_attr_list(const char *path, int filedes, char *list, size_t size, int flags)
{
int retval = 0, index;
attrlist_cursor_t *cursor = 0;
int total_size = 0;
attrlist_t * al = (attrlist_t *)attr_buffer;
attrlist_ent_t *ae;
size_t ent_size, left = size;
char *bp = list;
while (True) {
if (filedes)
retval = attr_listf(filedes, attr_buffer, ATTR_MAX_VALUELEN, flags, cursor);
else
retval = attr_list(path, attr_buffer, ATTR_MAX_VALUELEN, flags, cursor);
if (retval) break;
for (index = 0; index < al->al_count; index++) {
ae = ATTR_ENTRY(attr_buffer, index);
ent_size = strlen(ae->a_name) + sizeof("user.");
if (left >= ent_size) {
strncpy(bp, "user.", sizeof("user."));
strncat(bp, ae->a_name, ent_size - sizeof("user."));
bp += ent_size;
left -= ent_size;
} else if (size) {
errno = ERANGE;
retval = -1;
break;
}
total_size += ent_size;
}
if (al->al_more == 0) break;
}
if (retval == 0) {
flags |= ATTR_ROOT;
cursor = 0;
while (True) {
if (filedes)
retval = attr_listf(filedes, attr_buffer, ATTR_MAX_VALUELEN, flags, cursor);
else
retval = attr_list(path, attr_buffer, ATTR_MAX_VALUELEN, flags, cursor);
if (retval) break;
for (index = 0; index < al->al_count; index++) {
ae = ATTR_ENTRY(attr_buffer, index);
ent_size = strlen(ae->a_name) + sizeof("system.");
if (left >= ent_size) {
strncpy(bp, "system.", sizeof("system."));
strncat(bp, ae->a_name, ent_size - sizeof("system."));
bp += ent_size;
left -= ent_size;
} else if (size) {
errno = ERANGE;
retval = -1;
break;
}
total_size += ent_size;
}
if (al->al_more == 0) break;
}
}
return (ssize_t)(retval ? retval : total_size);
}
#endif
ssize_t sys_listxattr (const char *path, char *list, size_t size)
{
#if defined(HAVE_LISTXATTR)
return listxattr(path, list, size);
#elif defined(HAVE_ATTR_LIST) && defined(HAVE_SYS_ATTRIBUTES_H)
return irix_attr_list(path, 0, list, size, 0);
#else
errno = ENOSYS;
return -1;
#endif
}
ssize_t sys_llistxattr (const char *path, char *list, size_t size)
{
#if defined(HAVE_LLISTXATTR)
return llistxattr(path, list, size);
#elif defined(HAVE_ATTR_LIST) && defined(HAVE_SYS_ATTRIBUTES_H)
return irix_attr_list(path, 0, list, size, ATTR_DONTFOLLOW);
#else
errno = ENOSYS;
return -1;
#endif
}
ssize_t sys_flistxattr (int filedes, char *list, size_t size)
{
#if defined(HAVE_FLISTXATTR)
return flistxattr(filedes, list, size);
#elif defined(HAVE_ATTR_LISTF)
return irix_attr_list(NULL, filedes, list, size, 0);
#else
errno = ENOSYS;
return -1;
#endif
}
int sys_removexattr (const char *path, const char *name)
{
#if defined(HAVE_REMOVEXATTR)
return removexattr(path, name);
#elif defined(HAVE_ATTR_REMOVE)
int flags = 0;
char *attrname = strchr(name,'.') +1;
if (strncmp(name, "system", 6) == 0) flags |= ATTR_ROOT;
return attr_remove(path, attrname, flags);
#else
errno = ENOSYS;
return -1;
#endif
}
int sys_lremovexattr (const char *path, const char *name)
{
#if defined(HAVE_LREMOVEXATTR)
return lremovexattr(path, name);
#elif defined(HAVE_ATTR_REMOVE)
int flags = ATTR_DONTFOLLOW;
char *attrname = strchr(name,'.') +1;
if (strncmp(name, "system", 6) == 0) flags |= ATTR_ROOT;
return attr_remove(path, attrname, flags);
#else
errno = ENOSYS;
return -1;
#endif
}
int sys_fremovexattr (int filedes, const char *name)
{
#if defined(HAVE_FREMOVEXATTR)
return fremovexattr(filedes, name);
#elif defined(HAVE_ATTR_REMOVEF)
int flags = 0;
char *attrname = strchr(name,'.') +1;
if (strncmp(name, "system", 6) == 0) flags |= ATTR_ROOT;
return attr_removef(filedes, attrname, flags);
#else
errno = ENOSYS;
return -1;
#endif
}
#if !defined(HAVE_SETXATTR)
#define XATTR_CREATE 0x1 /* set value, fail if attr already exists */
#define XATTR_REPLACE 0x2 /* set value, fail if attr does not exist */
#endif
int sys_setxattr (const char *path, const char *name, const void *value, size_t size, int flags)
{
#if defined(HAVE_SETXATTR)
return setxattr(path, name, value, size, flags);
#elif defined(HAVE_ATTR_SET)
int myflags = 0;
char *attrname = strchr(name,'.') +1;
if (strncmp(name, "system", 6) == 0) myflags |= ATTR_ROOT;
if (flags & XATTR_CREATE) myflags |= ATTR_CREATE;
if (flags & XATTR_REPLACE) myflags |= ATTR_REPLACE;
return attr_set(path, attrname, (const char *)value, size, myflags);
#else
errno = ENOSYS;
return -1;
#endif
}
int sys_lsetxattr (const char *path, const char *name, const void *value, size_t size, int flags)
{
#if defined(HAVE_LSETXATTR)
return lsetxattr(path, name, value, size, flags);
#elif defined(HAVE_ATTR_SET)
int myflags = ATTR_DONTFOLLOW;
char *attrname = strchr(name,'.') +1;
if (strncmp(name, "system", 6) == 0) myflags |= ATTR_ROOT;
if (flags & XATTR_CREATE) myflags |= ATTR_CREATE;
if (flags & XATTR_REPLACE) myflags |= ATTR_REPLACE;
return attr_set(path, attrname, (const char *)value, size, myflags);
#else
errno = ENOSYS;
return -1;
#endif
}
int sys_fsetxattr (int filedes, const char *name, const void *value, size_t size, int flags)
{
#if defined(HAVE_FSETXATTR)
return fsetxattr(filedes, name, value, size, flags);
#elif defined(HAVE_ATTR_SETF)
int myflags = 0;
char *attrname = strchr(name,'.') +1;
if (strncmp(name, "system", 6) == 0) myflags |= ATTR_ROOT;
if (flags & XATTR_CREATE) myflags |= ATTR_CREATE;
if (flags & XATTR_REPLACE) myflags |= ATTR_REPLACE;
return attr_setf(filedes, attrname, (const char *)value, size, myflags);
#else
errno = ENOSYS;
return -1;
#endif
}
/****************************************************************************
Return the major devicenumber for UNIX extensions.
****************************************************************************/
uint32 unix_dev_major(SMB_DEV_T dev)
{
#if defined(HAVE_DEVICE_MAJOR_FN)
return (uint32)major(dev);
#else
return (uint32)(dev >> 8);
#endif
}
/****************************************************************************
Return the minor devicenumber for UNIX extensions.
****************************************************************************/
uint32 unix_dev_minor(SMB_DEV_T dev)
{
#if defined(HAVE_DEVICE_MINOR_FN)
return (uint32)minor(dev);
#else
return (uint32)(dev & 0xff);
#endif
}
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