1,072
edits
Changes
Jump to navigation
Jump to search
move the code out to a subpage VNC/newns.c
Line 13:
Line 13:
#define _GNU_SOURCE
−#include <stdio.h>
−#include <stdlib.h>
−#include <unistd.h>
−#include <string.h>
−#include <errno.h>
−#include <sys/mount.h>
−#include <sys/types.h>
−#include <sys/stat.h>
−#include <sys/wait.h>
−#include <sys/param.h>
−#include <sys/mman.h>
−#include <fcntl.h>
−#include <signal.h>
−#include <sched.h>
−
−#define STACK_SIZE (8 * 4096)
−
−static int ac;
−static char **av;
−static int ns_exec(void *_arg)
−{
− int fd;
−
− fd = open("newns.log", O_CREAT | O_TRUNC | O_RDWR | O_APPEND, 0600);
− if (fd >= 0) {
− close(0);
− dup2(fd, 1);
− dup2(fd, 2);
− close(fd);
− }
−
− setsid();
− execvp(av[1], av + 1);
− return 1;
−
−int main(int argc, char **argv)
−{
− void *stack;
− int ret;
− pid_t pid;
−
− ac = argc;
− av = argv;
−
− stack = mmap(NULL, STACK_SIZE, PROT_WRITE | PROT_READ,
− MAP_PRIVATE | MAP_GROWSDOWN | MAP_ANONYMOUS, -1, 0);
− if (stack == MAP_FAILED) {
− fprintf(stderr, "Can't map stack %m\n");
− exit(1);
− }
− pid = clone(ns_exec, stack + STACK_SIZE,
− CLONE_NEWPID | CLONE_NEWIPC | SIGCHLD, NULL);
− if (pid < 0) {
− fprintf(stderr, "clone() failed: %m\n");
− exit(1);
− }
− return 0;
−}
−</syntaxhighlight>
! <code>newns.c</code>
! <code>newns.c</code>
|-
|-
−| <syntaxhighlight lang="c">
+| {{:VNC/newns.c}}
−}
−|}
|}