Files
2015-04-16 09:16:48 +02:00

576 lines
11 KiB
C

/*
* This file is part of ixemul.library for the Amiga.
* Copyright (C) 1991, 1992 Markus M. Wild
* Portions Copyright (C) 1994 Rafael W. Luebbert
* Portions Copyright (C) 1996 Jeff Shepherd
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* stubs for group-file access functions */
#define _KERNEL
#include "ixemul.h"
#include "kprintf.h"
#include <stdlib.h>
#include <grp.h>
#include <stdio.h>
#include "multiuser.h"
#include <amitcp/usergroup.h>
#include "ixprotos.h"
/* builtin group info */
static const char *dummy_members[] = { 0 };
static const struct group builtin_wheel =
{ "wheel", "*", 0, (char **)dummy_members };
static const struct group builtin_nogroup =
{ "nogroup", "*", -2, (char **)dummy_members };
/* multiuser specific stuff */
static struct group *
GroupInfo2grp (struct muGroupInfo *GI, struct muUserInfo *UI)
{
static const char *members[] = { NULL };
usetup;
struct group *grp = &u.u_group;
if (GI)
{
grp->gr_name = GI->GroupID;
grp->gr_passwd = "*";
grp->gr_gid = __amiga2unixid(GI->gid);
grp->gr_mem = members; /* much work has to be done on this */
return grp;
}
return NULL;
}
/* builtin group file parsing */
#define MAXGRP 200
#define MAXLINELENGTH 1024
#define UNIX_STRSEP ":\n"
#define AMIGAOS_STRSEP "|\n"
static int
start_gr(void)
{
usetup;
if (u.u_grp_fp) {
syscall(SYS_rewind, u.u_grp_fp);
return 1;
}
return ((u.u_grp_fp = (FILE *)syscall(SYS_fopen, _PATH_GROUP, "r")) ? 1 : 0);
}
static int
grscan(int search, gid_t gid, char *name)
{
register char *cp, **m;
char *bp;
char *fgets(), *strsep(), *index();
char *sep;
usetup;
if (u.u_grp_line == NULL)
u.u_grp_line = malloc(MAXLINELENGTH);
if (u.u_members == NULL)
u.u_members = malloc(MAXGRP * sizeof(char *));
if (u.u_grp_line == NULL || u.u_members == NULL)
{
errno = ENOMEM;
return 0;
}
for (;;) {
if (!syscall(SYS_fgets, u.u_grp_line, MAXLINELENGTH, u.u_grp_fp))
return 0;
bp = u.u_grp_line;
/* skip lines that are too big */
if (!index(u.u_grp_line, '\n')) {
int ch;
while ((ch = getc(u.u_grp_fp)) != '\n' && ch != EOF) ;
continue;
}
sep = index(u.u_grp_line,'|') ? AMIGAOS_STRSEP : UNIX_STRSEP;
u.u_group.gr_name = strsep(&bp, sep);
if (search && name && strcmp(u.u_group.gr_name, name))
continue;
u.u_group.gr_passwd = strsep(&bp, sep);
if (!(cp = strsep(&bp, sep)))
continue;
u.u_group.gr_gid = (gid_t)atoi(cp);
if (search && name == NULL && u.u_group.gr_gid != gid)
continue;
for (m = u.u_group.gr_mem = u.u_members;; ++m) {
if (m == &u.u_members[MAXGRP - 1]) {
*m = NULL;
break;
}
if ((*m = strsep(&bp, ", \n")) == NULL)
break;
}
return 1;
}
/* NOTREACHED */
}
/* the real stuff */
gid_t
getgid (void)
{
usetup;
if (muBase)
return (__amiga2unixid(muGetTaskOwner(NULL) & muMASK_GID));
return u.u_rgid;
}
gid_t
getegid (void)
{
usetup;
if (muBase)
return (__amiga2unixid(muGetTaskOwner(NULL) & muMASK_GID));
return u.u_egid;
}
int
setregid (int rgid, int egid)
{
usetup;
if (muBase)
{
errno = ENOSYS;
return -1;
}
if (rgid != -1)
u.u_rgid = (gid_t)rgid;
if (egid != -1)
{
u.u_egid = (gid_t)egid;
u.u_grouplist[0] = egid;
}
/* just always succeed... */
return 0;
}
int
setgid (gid_t gid)
{
return syscall(SYS_setregid, (int)gid, (int)gid);
}
int
setegid (gid_t gid)
{
return syscall(SYS_setregid, -1, (int)gid);
}
struct group *getgrgid (gid_t gid)
{
struct group *gr;
usetup;
if (gid == (gid_t)(-2))
return (struct group *)&builtin_nogroup; /* always handle nogroup */
if (muBase)
{
/* active multiuser */
struct muGroupInfo *GI = u.u_GroupInfo;
struct muUserInfo *UI = u.u_UserInfo;
GI->gid = __unix2amigaid(gid);
GI = muGetGroupInfo (GI, muKeyType_gid);
return GroupInfo2grp (GI, UI); /* handles errors */
}
if (u.u_ixnetbase && (gr = (struct group *)netcall(NET_getgrgid, (int)gid)))
return gr;
if (start_gr())
{
int rval;
rval = grscan(1, gid, NULL);
if (!u.u_grp_stayopen)
syscall(SYS_endgrent);
return (rval ? &u.u_group : NULL);
}
if (gid == 0)
return (struct group *)&builtin_wheel;
if (gid == syscall(SYS_getgid) &&
((u.u_group.gr_name = (char *)syscall(SYS_getenv, "GROUP"))))
{
u.u_group.gr_gid = gid;
u.u_group.gr_passwd = "*";
u.u_group.gr_mem = (char **)dummy_members;
return(&u.u_group);
}
return 0;
}
struct group *getgrnam (const char *name)
{
struct group *gr;
usetup;
if (!strcmp(name,"nogroup"))
return (struct group *)&builtin_nogroup; /* always handle nogroup */
if (muBase)
{
/* active multiuser */
struct muGroupInfo *GI = u.u_GroupInfo;
struct muUserInfo *UI = u.u_UserInfo;
/*
* some validation checks
*/
if (name == NULL)
return NULL;
if ((muGROUPIDSIZE - 1) < strlen (name))
return NULL;
strcpy (GI->GroupID, name);
GI = muGetGroupInfo (GI, muKeyType_GroupID);
return GroupInfo2grp (GI, UI); /* handles errors */
}
if (u.u_ixnetbase && (gr = (struct group *)netcall(NET_getgrnam, name)))
return gr;
if (start_gr())
{
int rval;
rval = grscan(1, 0, (char *)name);
if (!u.u_grp_stayopen)
syscall(SYS_endgrent);
return (rval ? &u.u_group : NULL);
}
if (!strcmp(name,"wheel"))
return (struct group *)&builtin_wheel;
if (((u.u_group.gr_name = (char *)syscall(SYS_getenv, "GROUP"))) &&
!strcmp(name,u.u_group.gr_name))
{
u.u_group.gr_gid = syscall(SYS_getgid);
u.u_group.gr_passwd = "*";
u.u_group.gr_mem = (char **)dummy_members;
return(&u.u_group);
}
return 0;
}
struct group *
getgrent(void)
{
char *name;
usetup;
if (muBase)
{
/* active multiuser */
struct muGroupInfo *GI = u.u_fileGroupInfo;
struct muUserInfo *UI = u.u_UserInfo;
GI = muGetGroupInfo (GI, u.u_groupfileopen ? muKeyType_Next : muKeyType_First);
u.u_groupfileopen = TRUE;
return GroupInfo2grp (GI, UI); /* handles errors */
}
if (u.u_ixnetbase)
return (struct group *)netcall(NET_getgrent);
if ((u.u_grp_fp || start_gr()) && grscan(0, 0, NULL))
return &u.u_group;
switch (u.u_nextgid) {
case 0:
u.u_nextgid = 1;
return (struct group *)&builtin_wheel;
default:
u.u_nextgid = -2;
if ((name = (char *)syscall(SYS_getenv, "GROUP")))
return (struct group *)syscall(SYS_getgrnam, name);
case (gid_t)(-2):
u.u_nextgid = -1;
return (struct group *)&builtin_nogroup;
case (gid_t)(-1):
return 0;
}
}
int
setgroupent(int stayopen)
{
usetup;
if (muBase)
{
u.u_groupfileopen = FALSE;
return 1;
}
if (u.u_ixnetbase)
return netcall(NET_setgroupent, stayopen);
if (start_gr())
u.u_grp_stayopen = stayopen;
u.u_nextgid = 0;
return 1;
}
int
setgrent(void)
{
usetup;
if (muBase)
{
u.u_groupfileopen = FALSE;
return 1;
}
if (u.u_ixnetbase)
return netcall(NET_setgrent);
if (start_gr())
u.u_grp_stayopen = 0;
u.u_nextgid = 0;
return 1;
}
void
endgrent(void)
{
usetup;
if (muBase)
{
u.u_groupfileopen = FALSE;
return;
}
if (u.u_ixnetbase)
netcall(NET_endgrent);
if (u.u_grp_fp) {
syscall(SYS_fclose, u.u_grp_fp);
u.u_grp_fp = NULL;
}
u.u_nextgid = 0;
}
int
setgroups (int ngroups, const int *gidset)
{
usetup;
if (muBase)
return 0;
/* parameter check */
if (gidset == NULL || ngroups < 0)
{
errno = EFAULT;
KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
return -1;
}
if (ngroups == 0 || ngroups > NGROUPS_MAX)
{
errno = EINVAL;
KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
return -1;
}
u.u_ngroups = ngroups;
for (ngroups = 0; ngroups < u.u_ngroups; ngroups++)
{
u.u_grouplist[ngroups] = gidset[ngroups];
}
u.u_egid = (gid_t)(u.u_grouplist[0]);
return 0;
}
int
initgroups (const char *name, int basegid)
{
int ngroups = 2;
int gidset[NGROUPS_MAX];
struct group *gr;
char **grm;
usetup;
/* parameter check */
if (name == NULL || basegid == -1)
{
errno = EFAULT;
KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
return -1;
}
gidset[0] = gidset[1] = (gid_t)basegid;
syscall(SYS_setgrent);
while ((gr = (struct group *)syscall(SYS_getgrent)))
{
if (gr->gr_gid != (gid_t)basegid)
for (grm = gr->gr_mem; grm && *grm; grm++)
{
if (!strcmp(name,*grm))
{
gidset[ngroups++] = (int)(gr->gr_gid);
break;
}
}
if (ngroups == NGROUPS_MAX) break;
}
syscall(SYS_endgrent);
return syscall(SYS_setgroups, ngroups, gidset);
}
int getgroups(int gidsetlen, int *gidset)
{
usetup;
/* parameter check */
if (gidset == NULL || gidsetlen < 0)
{
errno = EFAULT;
KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
return -1;
}
if (gidsetlen < 1)
{
errno = EINVAL;
KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
return -1;
}
if (muBase)
{
/* muFS detected */
UWORD *Grps;
int i;
/* get the information */
struct muExtOwner *me = muGetTaskExtOwner (NULL);
if (me == 0)
{
*gidset = -2;
return 1; /* nobody */
}
/* store primary group */
gidset[0] = (int)__amiga2unixid(me->gid);
gidset++;
gidsetlen--;
/* ensure enough place */
if (gidsetlen < me->NumSecGroups)
{
errno = EINVAL;
KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
return -1;
}
/* slow, but have to copy from UWORD[] --> int[] */
Grps = muSecGroups (me);
for (i = me->NumSecGroups; i >= 0; i--)
gidset[i] = (int)__amiga2unixid(Grps[i]);
/* clean up */
i = me->NumSecGroups + 1;
muFreeExtOwner (me);
return i;
}
if (gidsetlen < u.u_ngroups)
{
errno = EINVAL;
KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
return -1;
}
for (gidsetlen = 0; gidsetlen < u.u_ngroups; gidsetlen++)
{
gidset[gidsetlen] = u.u_grouplist[gidsetlen];
}
return u.u_ngroups;
}