mirror of
https://github.com/samba-team/samba.git
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r13658: More moving around of files:
- Collect the generic utility functions into a lib/util/ (a la GLib is for the GNOME folks) - Remove even more files from include/
This commit is contained in:
Jelmer Vernooij
committed by
Gerald (Jerry) Carter
Gerald (Jerry) Carter
parent
bca0e8054f
commit
ba62880f5b
737
source/lib/util/util.c
Normal file
737
source/lib/util/util.c
Normal file
@@ -0,0 +1,737 @@
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/*
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Unix SMB/CIFS implementation.
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Samba utility functions
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Copyright (C) Andrew Tridgell 1992-1998
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Copyright (C) Jeremy Allison 2001-2002
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Copyright (C) Simo Sorce 2001
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Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2003.
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Copyright (C) James J Myers 2003
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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#include "dynconfig.h"
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#include "system/network.h"
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#include "system/iconv.h"
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#include "system/filesys.h"
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/***************************************************************************
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Find a suitable temporary directory. The result should be copied immediately
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as it may be overwritten by a subsequent call.
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****************************************************************************/
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const char *tmpdir(void)
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{
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char *p;
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if ((p = getenv("TMPDIR")))
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return p;
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return "/tmp";
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}
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/*******************************************************************
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Check if a file exists - call vfs_file_exist for samba files.
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********************************************************************/
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BOOL file_exist(const char *fname)
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{
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struct stat st;
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if (stat(fname, &st) != 0) {
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return False;
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}
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return ((S_ISREG(st.st_mode)) || (S_ISFIFO(st.st_mode)));
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}
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/*******************************************************************
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Check a files mod time.
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********************************************************************/
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time_t file_modtime(const char *fname)
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{
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struct stat st;
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if (stat(fname,&st) != 0)
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return(0);
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return(st.st_mtime);
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}
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/*******************************************************************
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Check if a directory exists.
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********************************************************************/
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BOOL directory_exist(const char *dname)
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{
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struct stat st;
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BOOL ret;
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if (stat(dname,&st) != 0) {
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return False;
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}
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ret = S_ISDIR(st.st_mode);
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if(!ret)
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errno = ENOTDIR;
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return ret;
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}
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BOOL directory_create_or_exist(const char *dname, uid_t uid,
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mode_t dir_perms)
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{
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mode_t old_umask;
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struct stat st;
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old_umask = umask(0);
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if (lstat(dname, &st) == -1) {
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if (errno == ENOENT) {
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/* Create directory */
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if (mkdir(dname, dir_perms) == -1) {
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DEBUG(0, ("error creating directory "
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"%s: %s\n", dname,
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strerror(errno)));
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umask(old_umask);
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return False;
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}
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} else {
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DEBUG(0, ("lstat failed on directory %s: %s\n",
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dname, strerror(errno)));
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umask(old_umask);
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return False;
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}
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} else {
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/* Check ownership and permission on existing directory */
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if (!S_ISDIR(st.st_mode)) {
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DEBUG(0, ("directory %s isn't a directory\n",
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dname));
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umask(old_umask);
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return False;
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}
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if ((st.st_uid != uid) ||
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((st.st_mode & 0777) != dir_perms)) {
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DEBUG(0, ("invalid permissions on directory "
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"%s\n", dname));
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umask(old_umask);
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return False;
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}
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}
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return True;
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}
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/*******************************************************************
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Close the low 3 fd's and open dev/null in their place.
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********************************************************************/
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static void close_low_fds(BOOL stderr_too)
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{
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#ifndef VALGRIND
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int fd;
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int i;
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close(0);
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close(1);
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if (stderr_too)
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close(2);
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/* try and use up these file descriptors, so silly
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library routines writing to stdout etc won't cause havoc */
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for (i=0;i<3;i++) {
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if (i == 2 && !stderr_too)
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continue;
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fd = open("/dev/null",O_RDWR,0);
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if (fd < 0)
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fd = open("/dev/null",O_WRONLY,0);
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if (fd < 0) {
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DEBUG(0,("Can't open /dev/null\n"));
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return;
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}
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if (fd != i) {
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DEBUG(0,("Didn't get file descriptor %d\n",i));
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return;
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}
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}
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#endif
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}
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/****************************************************************************
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Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
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else
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if SYSV use O_NDELAY
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if BSD use FNDELAY
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****************************************************************************/
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int set_blocking(int fd, BOOL set)
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{
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int val;
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#ifdef O_NONBLOCK
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#define FLAG_TO_SET O_NONBLOCK
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#else
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#ifdef SYSV
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#define FLAG_TO_SET O_NDELAY
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#else /* BSD */
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#define FLAG_TO_SET FNDELAY
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#endif
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#endif
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if((val = fcntl(fd, F_GETFL, 0)) == -1)
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return -1;
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if(set) /* Turn blocking on - ie. clear nonblock flag */
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val &= ~FLAG_TO_SET;
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else
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val |= FLAG_TO_SET;
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return fcntl( fd, F_SETFL, val);
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#undef FLAG_TO_SET
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}
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/*******************************************************************
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Sleep for a specified number of milliseconds.
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********************************************************************/
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void msleep(uint_t t)
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{
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struct timeval tval;
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tval.tv_sec = t/1000;
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tval.tv_usec = 1000*(t%1000);
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/* this should be the real select - do NOT replace
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with sys_select() */
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select(0,NULL,NULL,NULL,&tval);
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}
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/****************************************************************************
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Become a daemon, discarding the controlling terminal.
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****************************************************************************/
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void become_daemon(BOOL Fork)
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{
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if (Fork) {
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if (fork()) {
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_exit(0);
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}
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}
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/* detach from the terminal */
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#ifdef HAVE_SETSID
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setsid();
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#elif defined(TIOCNOTTY)
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{
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int i = open("/dev/tty", O_RDWR, 0);
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if (i != -1) {
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ioctl(i, (int) TIOCNOTTY, (char *)0);
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close(i);
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}
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}
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#endif /* HAVE_SETSID */
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/* Close fd's 0,1,2. Needed if started by rsh */
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close_low_fds(False); /* Don't close stderr, let the debug system
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attach it to the logfile */
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}
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/****************************************************************************
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Free memory, checks for NULL.
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Use directly SAFE_FREE()
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Exists only because we need to pass a function pointer somewhere --SSS
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****************************************************************************/
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void safe_free(void *p)
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{
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SAFE_FREE(p);
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}
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/*
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see if a string matches either our primary or one of our secondary
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netbios aliases. do a case insensitive match
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*/
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BOOL is_myname(const char *name)
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{
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const char **aliases;
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int i;
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if (strcasecmp(name, lp_netbios_name()) == 0) {
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return True;
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}
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aliases = lp_netbios_aliases();
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for (i=0; aliases && aliases[i]; i++) {
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if (strcasecmp(name, aliases[i]) == 0) {
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return True;
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}
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}
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return False;
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}
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/****************************************************************************
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Get my own name, return in malloc'ed storage.
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****************************************************************************/
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char* get_myname(void)
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{
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char *hostname;
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const int host_name_max = 255;
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char *p;
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hostname = malloc(host_name_max+1);
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*hostname = 0;
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/* get my host name */
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if (gethostname(hostname, host_name_max+1) == -1) {
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DEBUG(0,("gethostname failed\n"));
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return NULL;
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}
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/* Ensure null termination. */
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hostname[host_name_max] = '\0';
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/* split off any parts after an initial . */
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p = strchr_m(hostname,'.');
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if (p)
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*p = 0;
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return hostname;
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}
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/****************************************************************************
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Return true if a string could be a pure IP address.
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****************************************************************************/
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BOOL is_ipaddress(const char *str)
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{
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BOOL pure_address = True;
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int i;
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for (i=0; pure_address && str[i]; i++)
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if (!(isdigit((int)str[i]) || str[i] == '.'))
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pure_address = False;
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/* Check that a pure number is not misinterpreted as an IP */
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pure_address = pure_address && (strchr_m(str, '.') != NULL);
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return pure_address;
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}
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/****************************************************************************
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Interpret an internet address or name into an IP address in 4 byte form.
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****************************************************************************/
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uint32_t interpret_addr(const char *str)
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{
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struct hostent *hp;
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uint32_t res;
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if (str == NULL || *str == 0 ||
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strcmp(str,"0.0.0.0") == 0) {
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return 0;
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}
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if (strcmp(str,"255.255.255.255") == 0) {
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return 0xFFFFFFFF;
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}
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/* recognise 'localhost' as a special name. This fixes problems with
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some hosts that don't have localhost in /etc/hosts */
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if (strcasecmp(str,"localhost") == 0) {
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str = "127.0.0.1";
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}
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/* if it's in the form of an IP address then get the lib to interpret it */
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if (is_ipaddress(str)) {
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res = inet_addr(str);
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} else {
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/* otherwise assume it's a network name of some sort and use
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sys_gethostbyname */
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if ((hp = sys_gethostbyname(str)) == 0) {
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DEBUG(3,("sys_gethostbyname: Unknown host. %s\n",str));
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return 0;
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}
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if(hp->h_addr == NULL) {
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DEBUG(3,("sys_gethostbyname: host address is invalid for host %s\n",str));
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return 0;
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}
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memcpy((char *)&res,(char *)hp->h_addr, 4);
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}
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if (res == (uint32_t)-1)
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return(0);
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return(res);
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}
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/*******************************************************************
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A convenient addition to interpret_addr().
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******************************************************************/
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struct ipv4_addr interpret_addr2(const char *str)
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{
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struct ipv4_addr ret;
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uint32_t a = interpret_addr(str);
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ret.addr = a;
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return ret;
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}
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/*******************************************************************
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Check if an IP is the 0.0.0.0.
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******************************************************************/
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BOOL is_zero_ip(struct ipv4_addr ip)
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{
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return ip.addr == 0;
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}
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/*******************************************************************
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Are two IPs on the same subnet?
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********************************************************************/
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BOOL same_net(struct ipv4_addr ip1,struct ipv4_addr ip2,struct ipv4_addr mask)
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{
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uint32_t net1,net2,nmask;
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nmask = ntohl(mask.addr);
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net1 = ntohl(ip1.addr);
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net2 = ntohl(ip2.addr);
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return((net1 & nmask) == (net2 & nmask));
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}
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/****************************************************************************
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Check if a process exists. Does this work on all unixes?
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****************************************************************************/
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BOOL process_exists(pid_t pid)
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{
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/* Doing kill with a non-positive pid causes messages to be
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* sent to places we don't want. */
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SMB_ASSERT(pid > 0);
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return(kill(pid,0) == 0 || errno != ESRCH);
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}
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|
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/****************************************************************************
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Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
|
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is dealt with in posix.c
|
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****************************************************************************/
|
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|
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BOOL fcntl_lock(int fd, int op, off_t offset, off_t count, int type)
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{
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struct flock lock;
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int ret;
|
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|
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DEBUG(8,("fcntl_lock %d %d %.0f %.0f %d\n",fd,op,(double)offset,(double)count,type));
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lock.l_type = type;
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lock.l_whence = SEEK_SET;
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lock.l_start = offset;
|
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lock.l_len = count;
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lock.l_pid = 0;
|
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ret = fcntl(fd,op,&lock);
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|
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if (ret == -1 && errno != 0)
|
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DEBUG(3,("fcntl_lock: fcntl lock gave errno %d (%s)\n",errno,strerror(errno)));
|
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|
||||
/* a lock query */
|
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if (op == F_GETLK) {
|
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if ((ret != -1) &&
|
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(lock.l_type != F_UNLCK) &&
|
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(lock.l_pid != 0) &&
|
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(lock.l_pid != getpid())) {
|
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DEBUG(3,("fcntl_lock: fd %d is locked by pid %d\n",fd,(int)lock.l_pid));
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return(True);
|
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}
|
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|
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/* it must be not locked or locked by me */
|
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return(False);
|
||||
}
|
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|
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/* a lock set or unset */
|
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if (ret == -1) {
|
||||
DEBUG(3,("fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
|
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(double)offset,(double)count,op,type,strerror(errno)));
|
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return(False);
|
||||
}
|
||||
|
||||
/* everything went OK */
|
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DEBUG(8,("fcntl_lock: Lock call successful\n"));
|
||||
|
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return(True);
|
||||
}
|
||||
|
||||
|
||||
static void print_asc(int level, const uint8_t *buf,int len)
|
||||
{
|
||||
int i;
|
||||
for (i=0;i<len;i++)
|
||||
DEBUGADD(level,("%c", isprint(buf[i])?buf[i]:'.'));
|
||||
}
|
||||
|
||||
void dump_data(int level, const uint8_t *buf,int len)
|
||||
{
|
||||
int i=0;
|
||||
if (len<=0) return;
|
||||
|
||||
if (!DEBUGLVL(level)) return;
|
||||
|
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DEBUGADD(level,("[%03X] ",i));
|
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for (i=0;i<len;) {
|
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DEBUGADD(level,("%02X ",(int)buf[i]));
|
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i++;
|
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if (i%8 == 0) DEBUGADD(level,(" "));
|
||||
if (i%16 == 0) {
|
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print_asc(level,&buf[i-16],8); DEBUGADD(level,(" "));
|
||||
print_asc(level,&buf[i-8],8); DEBUGADD(level,("\n"));
|
||||
if (i<len) DEBUGADD(level,("[%03X] ",i));
|
||||
}
|
||||
}
|
||||
if (i%16) {
|
||||
int n;
|
||||
n = 16 - (i%16);
|
||||
DEBUGADD(level,(" "));
|
||||
if (n>8) DEBUGADD(level,(" "));
|
||||
while (n--) DEBUGADD(level,(" "));
|
||||
n = MIN(8,i%16);
|
||||
print_asc(level,&buf[i-(i%16)],n); DEBUGADD(level,( " " ));
|
||||
n = (i%16) - n;
|
||||
if (n>0) print_asc(level,&buf[i-n],n);
|
||||
DEBUGADD(level,("\n"));
|
||||
}
|
||||
}
|
||||
|
||||
/*****************************************************************
|
||||
malloc that aborts with smb_panic on fail or zero size.
|
||||
*****************************************************************/
|
||||
|
||||
void *smb_xmalloc(size_t size)
|
||||
{
|
||||
void *p;
|
||||
if (size == 0)
|
||||
smb_panic("smb_xmalloc: called with zero size.\n");
|
||||
if ((p = malloc(size)) == NULL)
|
||||
smb_panic("smb_xmalloc: malloc fail.\n");
|
||||
return p;
|
||||
}
|
||||
|
||||
/**
|
||||
Memdup with smb_panic on fail.
|
||||
**/
|
||||
|
||||
void *smb_xmemdup(const void *p, size_t size)
|
||||
{
|
||||
void *p2;
|
||||
p2 = smb_xmalloc(size);
|
||||
memcpy(p2, p, size);
|
||||
return p2;
|
||||
}
|
||||
|
||||
/**
|
||||
strdup that aborts on malloc fail.
|
||||
**/
|
||||
|
||||
char *smb_xstrdup(const char *s)
|
||||
{
|
||||
char *s1 = strdup(s);
|
||||
if (!s1)
|
||||
smb_panic("smb_xstrdup: malloc fail\n");
|
||||
return s1;
|
||||
}
|
||||
|
||||
|
||||
/*****************************************************************
|
||||
Like strdup but for memory.
|
||||
*****************************************************************/
|
||||
|
||||
void *memdup(const void *p, size_t size)
|
||||
{
|
||||
void *p2;
|
||||
if (size == 0)
|
||||
return NULL;
|
||||
p2 = malloc(size);
|
||||
if (!p2)
|
||||
return NULL;
|
||||
memcpy(p2, p, size);
|
||||
return p2;
|
||||
}
|
||||
|
||||
/*****************************************************************
|
||||
A useful function for returning a path in the Samba lock directory.
|
||||
*****************************************************************/
|
||||
char *lock_path(TALLOC_CTX* mem_ctx, const char *name)
|
||||
{
|
||||
char *fname, *dname;
|
||||
if (name == NULL) {
|
||||
return NULL;
|
||||
}
|
||||
if (name[0] == 0 || name[0] == '/' || strstr(name, ":/")) {
|
||||
return talloc_strdup(mem_ctx, name);
|
||||
}
|
||||
|
||||
dname = talloc_strdup(mem_ctx, lp_lockdir());
|
||||
trim_string(dname,"","/");
|
||||
|
||||
if (!directory_exist(dname)) {
|
||||
mkdir(dname,0755);
|
||||
}
|
||||
|
||||
fname = talloc_asprintf(mem_ctx, "%s/%s", dname, name);
|
||||
|
||||
talloc_free(dname);
|
||||
|
||||
return fname;
|
||||
}
|
||||
|
||||
|
||||
/*****************************************************************
|
||||
A useful function for returning a path in the Samba piddir directory.
|
||||
*****************************************************************/
|
||||
static char *pid_path(TALLOC_CTX* mem_ctx, const char *name)
|
||||
{
|
||||
char *fname, *dname;
|
||||
|
||||
dname = talloc_strdup(mem_ctx, lp_piddir());
|
||||
trim_string(dname,"","/");
|
||||
|
||||
if (!directory_exist(dname)) {
|
||||
mkdir(dname,0755);
|
||||
}
|
||||
|
||||
fname = talloc_asprintf(mem_ctx, "%s/%s", dname, name);
|
||||
|
||||
talloc_free(dname);
|
||||
|
||||
return fname;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* @brief Returns an absolute path to a file in the Samba lib directory.
|
||||
*
|
||||
* @param name File to find, relative to LIBDIR.
|
||||
*
|
||||
* @retval Pointer to a talloc'ed string containing the full path.
|
||||
**/
|
||||
|
||||
char *lib_path(TALLOC_CTX* mem_ctx, const char *name)
|
||||
{
|
||||
char *fname;
|
||||
fname = talloc_asprintf(mem_ctx, "%s/%s", dyn_LIBDIR, name);
|
||||
return fname;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Returns an absolute path to a file in the Samba private directory.
|
||||
*
|
||||
* @param name File to find, relative to PRIVATEDIR.
|
||||
* if name is not relative, then use it as-is
|
||||
*
|
||||
* @retval Pointer to a talloc'ed string containing the full path.
|
||||
**/
|
||||
char *private_path(TALLOC_CTX* mem_ctx, const char *name)
|
||||
{
|
||||
char *fname;
|
||||
if (name == NULL) {
|
||||
return NULL;
|
||||
}
|
||||
if (name[0] == 0 || name[0] == '/' || strstr(name, ":/")) {
|
||||
return talloc_strdup(mem_ctx, name);
|
||||
}
|
||||
fname = talloc_asprintf(mem_ctx, "%s/%s", lp_private_dir(), name);
|
||||
return fname;
|
||||
}
|
||||
|
||||
/*
|
||||
return a path in the smbd.tmp directory, where all temporary file
|
||||
for smbd go. If NULL is passed for name then return the directory
|
||||
path itself
|
||||
*/
|
||||
char *smbd_tmp_path(TALLOC_CTX *mem_ctx, const char *name)
|
||||
{
|
||||
char *fname, *dname;
|
||||
|
||||
dname = pid_path(mem_ctx, "smbd.tmp");
|
||||
if (!directory_exist(dname)) {
|
||||
mkdir(dname,0755);
|
||||
}
|
||||
|
||||
if (name == NULL) {
|
||||
return dname;
|
||||
}
|
||||
|
||||
fname = talloc_asprintf(mem_ctx, "%s/%s", dname, name);
|
||||
talloc_free(dname);
|
||||
|
||||
return fname;
|
||||
}
|
||||
|
||||
static char *modules_path(TALLOC_CTX* mem_ctx, const char *name)
|
||||
{
|
||||
return talloc_asprintf(mem_ctx, "%s/%s", dyn_MODULESDIR, name);
|
||||
}
|
||||
|
||||
init_module_fn *load_samba_modules(TALLOC_CTX *mem_ctx, const char *subsystem)
|
||||
{
|
||||
char *path = modules_path(mem_ctx, subsystem);
|
||||
init_module_fn *ret;
|
||||
|
||||
ret = load_modules(mem_ctx, path);
|
||||
|
||||
talloc_free(path);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
void dump_data_pw(const char *msg, const uint8_t * data, size_t len)
|
||||
{
|
||||
#ifdef DEBUG_PASSWORD
|
||||
DEBUG(11, ("%s", msg));
|
||||
if (data != NULL && len > 0)
|
||||
{
|
||||
dump_data(11, data, len);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
/* see if a range of memory is all zero. A NULL pointer is considered
|
||||
to be all zero */
|
||||
BOOL all_zero(const uint8_t *ptr, uint_t size)
|
||||
{
|
||||
int i;
|
||||
if (!ptr) return True;
|
||||
for (i=0;i<size;i++) {
|
||||
if (ptr[i]) return False;
|
||||
}
|
||||
return True;
|
||||
}
|
||||
|
||||
/*
|
||||
realloc an array, checking for integer overflow in the array size
|
||||
*/
|
||||
void *realloc_array(void *ptr, size_t el_size, unsigned count)
|
||||
{
|
||||
#define MAX_MALLOC_SIZE 0x7fffffff
|
||||
if (count == 0 ||
|
||||
count >= MAX_MALLOC_SIZE/el_size) {
|
||||
return NULL;
|
||||
}
|
||||
if (!ptr) {
|
||||
return malloc(el_size * count);
|
||||
}
|
||||
return realloc(ptr, el_size * count);
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user