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/*
* Copyright (c) 2004, Stefan Walter
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and
* the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* * The names of contributors to this software may not be
* used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*
* CONTRIBUTORS
* Stef Walter <stef@memberwebs.com>
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include "getjail.h"
#define PROC_STATUS_PATH "/proc/%d/status"
int getpidjail(pid_t pid, char* buff)
{
int fd;
size_t bytes;
off_t off;
/* Format the file name */
if(snprintf(buff, JAIL_BUFF_SIZE, PROC_STATUS_PATH, pid))
{
/* Open the file */
if((fd = open(buff, O_RDONLY)) >= 0)
{
/* Seek to the last bit */
off = lseek(fd, SEEK_END, 0);
if(off != -1)
{
off -= JAIL_BUFF_SIZE;
if(off < 0) off = 0;
lseek(fd, SEEK_SET, off);
if((bytes = read(fd, buff, JAIL_BUFF_SIZE - 1)) > 0)
{
/* Okay now jailname should be the last token */
while(isspace(buff[bytes - 1]))
bytes--;
buff[bytes] = 0;
while(!isspace(buff[bytes - 1]))
bytes--;
memmove(buff, buff + bytes, JAIL_BUFF_SIZE - bytes);
return 0;
}
}
}
}
return -1;
}
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