1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2019-2020 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17 18 #include <stdio.h> 19 #include <unistd.h> 20 #include <pthread.h> 21 #include <string.h> 22 #include <stdlib.h> 23 24 static char *program_name; 25 26 static void * 27 f (void *arg) 28 { 29 int res = vfork (); 30 31 if (res == -1) 32 { 33 perror ("vfork"); 34 return NULL; 35 } 36 else if (res == 0) 37 { 38 /* Child. */ 39 execl (program_name, program_name, "1", NULL); 40 perror ("exec"); 41 abort (); 42 } 43 else 44 { 45 /* Parent. */ 46 return NULL; 47 } 48 } 49 50 int 51 main (int argc, char **argv) 52 { 53 pthread_t tid; 54 55 if (argc > 1) 56 { 57 /* Getting here via execl. */ 58 return 0; 59 } 60 61 program_name = argv[0]; 62 63 pthread_create (&tid, NULL, f, NULL); 64 pthread_join (tid, NULL); 65 return 0; 66 } 67