1 files changed, 157 insertions, 0 deletions
diff --git a/src/jails.c b/src/jails.c
new file mode 100644
index 0000000..9c99743
--- /dev/null
+++ b/src/jails.c
@@ -0,0 +1,157 @@
+/*
+// 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>
+//
+// CHANGES
+// 0.5.1	kvm_openfiles call uses /dev/null so non root users can use
+*/
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <sys/proc.h>
+#include <sys/user.h>
+
+#include <paths.h>
+#include <stdio.h>
+#include <err.h>
+#include <errno.h>
+#include <kvm.h>
+#include <limits.h>
+#include <fcntl.h>
+
+#include "getjail.h"
+
+#ifdef HAVE_CONFIG_H
+#include "../config.h"
+#endif
+
+static int listJails();
+static void usage();
+
+int main(int argc, char* argv[])
+{
+	/* Nice main :) */
+	return listJails() >= 0 ? 0 : 1;
+}
+
+
+int listJails()
+{
+	kvm_t *kd;
+	struct kinfo_proc* kp;
+	char errbuf[_POSIX2_LINE_MAX];
+	char jailName[JAIL_BUFF_SIZE];
+	int nentries, i;
+
+
+	char* jails = NULL;		/* jail list buffer */
+	size_t nextJail = 0;	/* current write positon */
+	size_t endJails = 0;	/* size of buffer */
+	int numJails = 0;		/* return value */
+
+
+	/* Open kernel interface */
+	kd = kvm_openfiles(_PATH_DEVNULL, _PATH_DEVNULL, _PATH_DEVNULL,
+					   O_RDONLY, errbuf);
+	if(kd == 0)
+		errx(1, "%s", errbuf);
+
+	/* Get a process listing */
+	if((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == 0)
+		errx(1, "%s", kvm_geterr(kd));
+
+
+	/* Okay now loop through and look for the jails */
+	for(i = 0; i < nentries; i++)
+	{
+		pid_t pid;
+
+#if __FreeBSD_version > 500000
+
+		/* Check the flags first */
+		if(!(kp[i].ki_flag & P_JAILED))
+			continue;
+
+		pid = kp[i].ki_pid;
+
+#else
+
+		/* Check the flags first */
+		if(!(kp[i].kp_proc.p_flag & P_JAILED))
+			continue;
+
+		pid = kp[i].kp_proc.p_pid;
+
+#endif
+
+		/* Get this processes jail name */
+		if(getpidjail(pid, jailName) < 0)
+			continue;
+
+		if(jails)
+		{
+			char* j;
+
+			/* See if that jail name was already taken */
+			for(j = jails; *j != NULL; j += strlen(j) + 1)
+			{
+				if(!strcmp(jailName, j))
+					break;
+			}
+
+			/* Can't do this in loop above */
+			if(*j)
+				continue;
+		}
+
+
+		/* Okay we got a jail name */
+
+
+		/* Allocate if necessary enough space for it */
+		if(nextJail + strlen(jailName) + 2 > endJails)
+		{
+			endJails += (JAIL_BUFF_SIZE * 0x2);
+			jails = (char*)realloc(jails, endJails);
+			if(!jails)
+				errx(1, "out of memory");
+		}
+
+
+		/* Put the jail name in the buffer */
+		strcpy(jails + nextJail, jailName);
+		nextJail += strlen(jailName) + 1;
+		jails[nextJail] = 0;
+		numJails++;
+
+		/* And print it */
+		fprintf(stdout, "%s\n", jailName);
+	}
+
+	kvm_close(kd);
+
+	return numJails;
+}
+
+static void usage()
+{
+	fprintf(stderr, "usage: jails\n");
+	exit(2);
+}
+