1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2009 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * David Korn <dgk@research.att.com> * 19 * Phong Vo <kpv@research.att.com> * 20 * * 21 ***********************************************************************/ 22 #pragma prototyped 23 24 #include <ast.h> 25 26 #if _lib_execve 27 28 NoN(execve) 29 30 #else 31 32 #include <sig.h> 33 #include <wait.h> 34 #include <error.h> 35 36 static pid_t childpid; 37 38 static void 39 execsig(int sig) 40 { 41 kill(childpid, sig); 42 signal(sig, execsig); 43 } 44 45 #if defined(__EXPORT__) 46 #define extern __EXPORT__ 47 #endif 48 49 extern int 50 execve(const char* path, char* const argv[], char* const arge[]) 51 { 52 int status; 53 54 if ((childpid = spawnve(path, argv, arge)) < 0) 55 return(-1); 56 for (status = 0; status < 64; status++) 57 signal(status, execsig); 58 while (waitpid(childpid, &status, 0) == -1) 59 if (errno != EINTR) return(-1); 60 if (WIFSIGNALED(status)) 61 { 62 signal(WTERMSIG(status), SIG_DFL); 63 kill(getpid(), WTERMSIG(status)); 64 pause(); 65 } 66 else status = WEXITSTATUS(status); 67 exit(status); 68 } 69 70 #endif 71