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#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/socket.h>
#include "selinux_internal.h"
#include "policy.h"
#ifndef SO_PEERSEC
#define SO_PEERSEC 31
#endif
int getpeercon(int fd, char ** context)
{
char *buf;
socklen_t size;
ssize_t ret;
size = INITCONTEXTLEN + 1;
buf = malloc(size);
if (!buf)
return -1;
memset(buf, 0, size);
ret = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, buf, &size);
if (ret < 0 && errno == ERANGE) {
char *newbuf;
newbuf = realloc(buf, size);
if (!newbuf)
goto out;
buf = newbuf;
memset(buf, 0, size);
ret = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, buf, &size);
}
out:
if (ret < 0)
free(buf);
else
*context = buf;
return ret;
}
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