1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2011 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Eclipse Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.eclipse.org/org/documents/epl-v10.html * 11 * (with md5 checksum b35adb5213ca9657e911e9befb180842) * 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 * Glenn Fowler 25 * AT&T Research 26 * 27 * close a proc opened by procopen() 28 * otherwise exit() status of process is returned 29 */ 30 31 #include "proclib.h" 32 33 int 34 procclose(register Proc_t* p) 35 { 36 int pid; 37 int flags = 0; 38 int status = -1; 39 40 if (p) 41 { 42 if (p->rfd >= 0) 43 close(p->rfd); 44 if (p->wfd >= 0 && p->wfd != p->rfd) 45 close(p->wfd); 46 if (p->flags & PROC_ORPHAN) 47 status = 0; 48 else 49 { 50 if (p->flags & PROC_ZOMBIE) 51 { 52 /* 53 * process may leave a zombie behind 54 * give it a chance to do that but 55 * don't hang waiting for it 56 */ 57 58 flags |= WNOHANG; 59 sleep(1); 60 } 61 if (!(p->flags & PROC_FOREGROUND)) 62 sigcritical(SIG_REG_EXEC|SIG_REG_PROC); 63 while ((pid = waitpid(p->pid, &status, flags)) == -1 && errno == EINTR); 64 if (pid != p->pid && (flags & WNOHANG)) 65 status = 0; 66 if (!(p->flags & PROC_FOREGROUND)) 67 sigcritical(0); 68 else 69 { 70 if (p->sigint != SIG_IGN) 71 signal(SIGINT, p->sigint); 72 if (p->sigquit != SIG_IGN) 73 signal(SIGQUIT, p->sigquit); 74 #if defined(SIGCHLD) 75 #if _lib_sigprocmask 76 sigprocmask(SIG_SETMASK, &p->mask, NiL); 77 #else 78 #if _lib_sigsetmask 79 sigsetmask(p->mask); 80 #else 81 if (p->sigchld != SIG_DFL) 82 signal(SIGCHLD, p->sigchld); 83 #endif 84 #endif 85 #endif 86 } 87 status = status == -1 ? 88 EXIT_QUIT : 89 WIFSIGNALED(status) ? 90 EXIT_TERM(WTERMSIG(status)) : 91 EXIT_CODE(WEXITSTATUS(status)); 92 } 93 procfree(p); 94 } 95 else 96 status = errno == ENOENT ? EXIT_NOTFOUND : EXIT_NOEXEC; 97 return status; 98 } 99