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#include <errno.h>
#include <linux/sched.h>
#include <linux/tty.h>
#include <linux/kernel.h>
#include <asm/segment.h>
#include <sys/times.h>
#include <sys/utsname.h>
int sys_ftime()
{
return -ENOSYS;
}
int sys_mknod()
{
return -ENOSYS;
}
int sys_break()
{
return -ENOSYS;
}
int sys_mount()
{
return -ENOSYS;
}
int sys_umount()
{
return -ENOSYS;
}
int sys_ustat(int dev,struct ustat * ubuf)
{
return -1;
}
int sys_ptrace()
{
return -ENOSYS;
}
int sys_stty()
{
return -ENOSYS;
}
int sys_gtty()
{
return -ENOSYS;
}
int sys_rename()
{
return -ENOSYS;
}
int sys_prof()
{
return -ENOSYS;
}
int sys_setgid(int gid)
{
if (current->euid && current->uid)
if (current->gid==gid || current->sgid==gid)
current->egid=gid;
else
return -EPERM;
else
current->gid=current->egid=gid;
return 0;
}
int sys_acct()
{
return -ENOSYS;
}
int sys_phys()
{
return -ENOSYS;
}
int sys_lock()
{
return -ENOSYS;
}
int sys_mpx()
{
return -ENOSYS;
}
int sys_ulimit()
{
return -ENOSYS;
}
int sys_time(long * tloc)
{
int i;
i = CURRENT_TIME;
if (tloc) {
verify_area(tloc,4);
put_fs_long(i,(unsigned long *)tloc);
}
return i;
}
int sys_setuid(int uid)
{
if (current->euid && current->uid)
if (uid==current->uid || current->suid==current->uid)
current->euid=uid;
else
return -EPERM;
else
current->euid=current->uid=uid;
return 0;
}
int sys_stime(long * tptr)
{
if (current->euid && current->uid)
return -1;
startup_time = get_fs_long((unsigned long *)tptr) - jiffies/HZ;
return 0;
}
int sys_times(struct tms * tbuf)
{
if (!tbuf)
return jiffies;
verify_area(tbuf,sizeof *tbuf);
put_fs_long(current->utime,(unsigned long *)&tbuf->tms_utime);
put_fs_long(current->stime,(unsigned long *)&tbuf->tms_stime);
put_fs_long(current->cutime,(unsigned long *)&tbuf->tms_cutime);
put_fs_long(current->cstime,(unsigned long *)&tbuf->tms_cstime);
return jiffies;
}
int sys_brk(unsigned long end_data_seg)
{
if (end_data_seg >= current->end_code &&
end_data_seg < current->start_stack - 16384)
current->brk = end_data_seg;
return current->brk;
}
/*
* This needs some heave checking ...
* I just haven't get the stomach for it. I also don't fully
* understand sessions/pgrp etc. Let somebody who does explain it.
*/
int sys_setpgid(int pid, int pgid)
{
int i;
if (!pid)
pid = current->pid;
if (!pgid)
pgid = pid;
for (i=0 ; i<NR_TASKS ; i++)
if (task[i] && task[i]->pid==pid) {
if (task[i]->leader)
return -EPERM;
if (task[i]->session != current->session)
return -EPERM;
task[i]->pgrp = pgid;
return 0;
}
return -ESRCH;
}
int sys_getpgrp(void)
{
return current->pgrp;
}
int sys_setsid(void)
{
if (current->uid && current->euid)
return -EPERM;
if (current->leader)
return -EPERM;
current->leader = 1;
current->session = current->pgrp = current->pid;
current->tty = -1;
return current->pgrp;
}
int sys_uname(struct utsname * name)
{
static struct utsname thisname = {
"linux .0","nodename","release ","version ","machine "
};
int i;
if (!name) return -1;
verify_area(name,sizeof *name);
for(i=0;i<sizeof *name;i++)
put_fs_byte(((char *) &thisname)[i],i+(char *) name);
return (0);
}
int sys_umask(int mask)
{
int old = current->umask;
current->umask = mask & 0777;
return (old);
}
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