1 files changed, 69 insertions, 0 deletions
diff --git a/src/getjail.c b/src/getjail.c
new file mode 100644
index 0000000..9106557
--- /dev/null
+++ b/src/getjail.c
@@ -0,0 +1,69 @@
+/*
+// 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;
+}