Merge unshare and nsenter (promoting and cleaning up nsenter).

Needs more testing, don't have a test environment set up for this yet...

1 files changed, 0 insertions, 104 deletions

diff --git a/toys/pending/nsenter.c b/toys/pending/nsenter.c
deleted file mode 100644
index 33db873e..00000000
--- a/toys/pending/nsenter.c
+++ /dev/null
@@ -1,104 +0,0 @@
-/* nsenter.c - Enter existing namespaces
- *
- * Copyright 2014 andy Lutomirski <luto@amacapital.net>
-
-USE_NSENTER(NEWTOY(nsenter, "<1F(no-fork)t#(target)i:(ipc);m:(mount);n:(net);p:(pid);u:(uts);U:(user);", TOYFLAG_USR|TOYFLAG_BIN))
-
-config NSENTER
-  bool "nsenter"
-  default n
-  help
-    usage: nsenter [-t pid] [-F] [-i] [-m] [-n] [-p] [-u] [-U] COMMAND...
-
-    Run COMMAND in a different set of namespaces.
-
-    -T  PID to take namespaces from
-    -F  don't fork, even if -p is set
-
-    The namespaces to switch are:
-
-    -i	SysV IPC (message queues, semaphores, shared memory)
-    -m	Mount/unmount tree
-    -n	Network address, sockets, routing, iptables
-    -p	Process IDs and init (will fork unless -F is used)
-    -u	Host and domain names
-    -U	UIDs, GIDs, capabilities
-
-    Each of those options takes an optional argument giving the path of
-    the namespace file (usually in /proc).  This optional argument is
-    mandatory unless -t is used.
-*/
-
-#define FOR_nsenter
-#define _GNU_SOURCE
-#include "toys.h"
-#include <errno.h>
-#include <sched.h>
-#include <linux/sched.h>
-
-#define NUM_NSTYPES 6
-
-struct nstype {
-  int type;
-  const char *name;
-};
-
-struct nstype nstypes[NUM_NSTYPES] = {
-  {CLONE_NEWUSER, "user"}, /* must be first to allow non-root operation */
-  {CLONE_NEWUTS,  "uts"},
-  {CLONE_NEWPID,  "pid"},
-  {CLONE_NEWNET,  "net"},
-  {CLONE_NEWNS,   "mnt"},
-  {CLONE_NEWIPC,  "ipc"},
-};
-
-GLOBALS(
-  char *nsnames[6];
-  long targetpid;
-)
-
-static void enter_by_name(int idx)
-{
-  int fd, rc;
-  char buf[64];
-  char *filename = TT.nsnames[idx];
-
-  if (!(toys.optflags & (1<<idx))) return;
-
-  if (!filename || !*filename) {
-    if (!(toys.optflags & (1<<NUM_NSTYPES)))
-      error_exit("either -t or an ns filename is required");
-    sprintf(buf, "/proc/%ld/ns/%s", TT.targetpid, nstypes[idx].name);
-    filename = buf;
-  }
-
-  fd = open(filename, O_RDONLY | O_CLOEXEC);
-  if (fd == -1) perror_exit(filename);
-
-  rc = setns(fd, nstypes[idx].type);
-  if (CFG_TOYBOX_FREE) close(fd);
-  if (rc != 0) perror_exit("setns");
-}
-
-void nsenter_main(void)
-{
-  int i;
-
-  for (i = 0; i < NUM_NSTYPES; i++)
-    enter_by_name(i);
-
-  if ((toys.optflags & (1<<2)) && !(toys.optflags & 1<<(NUM_NSTYPES+1))) {
-    /* changed PID ns and --no-fork wasn't set, so fork. */
-    pid_t pid = fork();
-
-    if (pid == -1) {
-      perror_exit("fork");
-    } else if (pid != 0) {
-      while (waitpid(pid, 0, 0) == -1 && errno == EINTR)
-        ;
-      return;
-    }
-  }
-
-  xexec_optargs(0);
-}