code-intelligence.com/cifuzz@v0.40.0/third-party/minijail/minijail0.c (about) 1 /* Copyright (c) 2012 The Chromium OS Authors. All rights reserved. 2 * Use of this source code is governed by a BSD-style license that can be 3 * found in the LICENSE file. 4 */ 5 6 #include <dlfcn.h> 7 #include <errno.h> 8 #include <stdio.h> 9 #include <stdlib.h> 10 #include <unistd.h> 11 12 #include "libminijail.h" 13 14 #include "elfparse.h" 15 #include "minijail0_cli.h" 16 #include "util.h" 17 18 int main(int argc, char *argv[]) 19 { 20 struct minijail *j = minijail_new(); 21 const char *dl_mesg = NULL; 22 const char *preload_path = PRELOADPATH; 23 int exit_immediately = 0; 24 ElfType elftype = ELFERROR; 25 int consumed = parse_args(j, argc, argv, &exit_immediately, &elftype, 26 &preload_path); 27 argc -= consumed; 28 argv += consumed; 29 30 /* 31 * Make the process group ID of this process equal to its PID. 32 * In the non-interactive case (e.g. when minijail0 is started from 33 * init) this ensures the parent process and the jailed process 34 * can be killed together. 35 * 36 * Don't fail on EPERM, since setpgid(0, 0) can only EPERM when 37 * the process is already a process group leader. 38 */ 39 if (setpgid(0 /* use calling PID */, 0 /* make PGID = PID */)) { 40 if (errno != EPERM) { 41 fprintf(stderr, "setpgid(0, 0) failed\n"); 42 exit(1); 43 } 44 } 45 46 if (elftype == ELFSTATIC) { 47 /* 48 * Target binary is statically linked so we cannot use 49 * libminijailpreload.so. 50 */ 51 minijail_run_no_preload(j, argv[0], argv); 52 } else if (elftype == ELFDYNAMIC) { 53 /* 54 * Target binary is dynamically linked so we can 55 * inject libminijailpreload.so into it. 56 */ 57 58 /* Check that we can dlopen() libminijailpreload.so. */ 59 if (!dlopen(preload_path, RTLD_LAZY | RTLD_LOCAL)) { 60 dl_mesg = dlerror(); 61 fprintf(stderr, "dlopen(): %s\n", dl_mesg); 62 return 1; 63 } 64 minijail_set_preload_path(j, preload_path); 65 minijail_run(j, argv[0], argv); 66 } else { 67 fprintf(stderr, 68 "Target program '%s' is not a valid ELF file.\n", 69 argv[0]); 70 return 1; 71 } 72 73 if (exit_immediately) 74 return 0; 75 76 int ret = minijail_wait(j); 77 #if defined(__SANITIZE_ADDRESS__) 78 minijail_destroy(j); 79 #endif /* __SANITIZE_ADDRESS__ */ 80 return ret; 81 }