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/*
// AUTHOR
// N. Nielsen
//
// LICENSE
// This software is in the public domain.
//
// The software is provided "as is", without warranty of any kind,
// express or implied, including but not limited to the warranties
// of merchantability, fitness for a particular purpose, and
// noninfringement. In no event shall the author(s) be liable for any
// claim, damages, or other liability, whether in an action of
// contract, tort, or otherwise, arising from, out of, or in connection
// with the software or the use or other dealings in the software.
//
// SUPPORT
// Send bug reports to: <nielsen@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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