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/*
Unix SMB/Netbios implementation.
Version 1.9.
replacement routines for broken systems
Copyright (C) Andrew Tridgell 1992-1998
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"
extern int DEBUGLEVEL;
void replace_dummy(void)
{}
#ifndef HAVE_FTRUNCATE
/*******************************************************************
ftruncate for operating systems that don't have it
********************************************************************/
int ftruncate(int f,long l)
{
struct flock fl;
fl.l_whence = 0;
fl.l_len = 0;
fl.l_start = l;
fl.l_type = F_WRLCK;
return fcntl(f, F_FREESP, &fl);
}
#endif
#ifndef HAVE_MKTIME
/*******************************************************************
a mktime() replacement for those who don't have it - contributed by
C.A. Lademann <cal@zls.com>
********************************************************************/
#define MINUTE 60
#define HOUR 60*MINUTE
#define DAY 24*HOUR
#define YEAR 365*DAY
time_t mktime(struct tm *t)
{
struct tm *u;
time_t epoch = 0;
int mon [] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
y, m, i;
if(t->tm_year < 70)
return((time_t)-1);
epoch = (t->tm_year - 70) * YEAR +
(t->tm_year / 4 - 70 / 4 - t->tm_year / 100) * DAY;
y = t->tm_year;
m = 0;
for(i = 0; i < t->tm_mon; i++) {
epoch += mon [m] * DAY;
if(m == 1 && y % 4 == 0 && (y % 100 != 0 || y % 400 == 0))
epoch += DAY;
if(++m > 11) {
m = 0;
y++;
}
}
epoch += (t->tm_mday - 1) * DAY;
epoch += t->tm_hour * HOUR + t->tm_min * MINUTE + t->tm_sec;
if((u = localtime(&epoch)) != NULL) {
t->tm_sec = u->tm_sec;
t->tm_min = u->tm_min;
t->tm_hour = u->tm_hour;
t->tm_mday = u->tm_mday;
t->tm_mon = u->tm_mon;
t->tm_year = u->tm_year;
t->tm_wday = u->tm_wday;
t->tm_yday = u->tm_yday;
t->tm_isdst = u->tm_isdst;
}
return(epoch);
}
#endif /* !HAVE_MKTIME */
#ifndef HAVE_RENAME
/* Rename a file. (from libiberty in GNU binutils) */
int rename(const char *zfrom, const char *zto)
{
if (link (zfrom, zto) < 0)
{
if (errno != EEXIST)
return -1;
if (unlink (zto) < 0
|| link (zfrom, zto) < 0)
return -1;
}
return unlink (zfrom);
}
#endif
#ifndef HAVE_INNETGR
/*
* Search for a match in a netgroup. This replaces it on broken systems.
*/
int innetgr(char *group,char *host,char *user,char *dom)
{
char *hst, *usr, *dm;
setnetgrent(group);
while (getnetgrent(&hst, &usr, &dm)) {
if (((host == 0) || (hst == 0) || !strcmp(host, hst)) &&
((user == 0) || (usr == 0) || !strcmp(user, usr)) &&
((dom == 0) || (dm == 0) || !strcmp(dom, dm))) {
endnetgrent();
return (1);
}
}
endnetgrent();
return (0);
}
#endif
#ifndef HAVE_INITGROUPS
/****************************************************************************
some systems don't have an initgroups call
****************************************************************************/
int initgroups(char *name,gid_t id)
{
#ifndef HAVE_SETGROUPS
static int done;
if (!done) {
DEBUG(1,("WARNING: running without setgroups\n"));
done=1;
}
/* yikes! no SETGROUPS or INITGROUPS? how can this work? */
return(0);
#else
gid_t grouplst[NGROUPS_MAX];
int i,j;
struct group *g;
char *gr;
grouplst[0] = id;
i = 1;
while (i < NGROUPS_MAX &&
((g = (struct group *)getgrent()) != (struct group *)NULL)) {
if (g->gr_gid == id)
continue;
j = 0;
gr = g->gr_mem[0];
while (gr && (*gr != (char)NULL)) {
if (strcmp(name,gr) == 0) {
grouplst[i] = g->gr_gid;
i++;
gr = (char *)NULL;
break;
}
gr = g->gr_mem[++j];
}
}
endgrent();
return(setgroups(i,grouplst));
#endif
}
#endif
#if (defined(SecureWare) && defined(SCO))
/* This is needed due to needing the nap() function but we don't want
to include the Xenix libraries since that will break other things...
BTW: system call # 0x0c28 is the same as calling nap() */
long nap(long milliseconds) {
return syscall(0x0c28, milliseconds);
}
#endif
#ifndef HAVE_MEMMOVE
/*******************************************************************
safely copies memory, ensuring no overlap problems.
this is only used if the machine does not have it's own memmove().
this is not the fastest algorithm in town, but it will do for our
needs.
********************************************************************/
void *memmove(void *dest,const void *src,int size)
{
unsigned long d,s;
int i;
if (dest==src || !size) return(dest);
d = (unsigned long)dest;
s = (unsigned long)src;
if ((d >= (s+size)) || (s >= (d+size))) {
/* no overlap */
memcpy(dest,src,size);
return(dest);
}
if (d < s) {
/* we can forward copy */
if (s-d >= sizeof(int) &&
!(s%sizeof(int)) &&
!(d%sizeof(int)) &&
!(size%sizeof(int))) {
/* do it all as words */
int *idest = (int *)dest;
int *isrc = (int *)src;
size /= sizeof(int);
for (i=0;i<size;i++) idest[i] = isrc[i];
} else {
/* simplest */
char *cdest = (char *)dest;
char *csrc = (char *)src;
for (i=0;i<size;i++) cdest[i] = csrc[i];
}
} else {
/* must backward copy */
if (d-s >= sizeof(int) &&
!(s%sizeof(int)) &&
!(d%sizeof(int)) &&
!(size%sizeof(int))) {
/* do it all as words */
int *idest = (int *)dest;
int *isrc = (int *)src;
size /= sizeof(int);
for (i=size-1;i>=0;i--) idest[i] = isrc[i];
} else {
/* simplest */
char *cdest = (char *)dest;
char *csrc = (char *)src;
for (i=size-1;i>=0;i--) cdest[i] = csrc[i];
}
}
return(dest);
}
#endif
#ifndef HAVE_STRDUP
/****************************************************************************
duplicate a string
****************************************************************************/
char *strdup(const char *s)
{
int len;
char *ret;
if (!s) return(NULL);
len = strlen(s)+1;
ret = (char *)malloc(len);
if (!ret) return(NULL);
memcpy(ret,s,len);
return(ret);
}
#endif
#ifdef REPLACE_INET_NTOA
char *rep_inet_ntoa(struct in_addr ip)
{
unsigned char *p = (unsigned char *)ip.s_addr;
static char buf[18];
#if WORDS_BIGENDIAN
slprintf(buf, 17, "%d.%d.%d.%d",
(int)p[0], (int)p[1], (int)p[2], (int)p[3]);
#else
slprintf(buf, 17, "%d.%d.%d.%d",
(int)p[3], (int)p[2], (int)p[1], (int)p[0]);
#endif
return buf;
}
#endif
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