1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Knowledge Ventures * 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 /* 25 * -last fcntl 26 */ 27 28 #include <ast.h> 29 30 #ifndef fcntl 31 32 NoN(fcntl) 33 34 #else 35 36 #include <ls.h> 37 #include <ast_tty.h> 38 #include <error.h> 39 40 #if F_SETFD >= _ast_F_LOCAL 41 #if _sys_filio 42 #include <sys/filio.h> 43 #endif 44 #endif 45 46 #if _lib_fcntl 47 #undef fcntl 48 extern int fcntl(int, int, ...); 49 #endif 50 51 int 52 _ast_fcntl(int fd, int op, ...) 53 { 54 int n; 55 int save_errno; 56 struct stat st; 57 va_list ap; 58 59 save_errno = errno; 60 va_start(ap, op); 61 if (op >= _ast_F_LOCAL) switch (op) 62 { 63 #if F_DUPFD >= _ast_F_LOCAL 64 case F_DUPFD: 65 n = va_arg(ap, int); 66 op = dup2(fd, n); 67 break; 68 #endif 69 #if F_GETFL >= _ast_F_LOCAL 70 case F_GETFL: 71 op = fstat(fd, &st); 72 break; 73 #endif 74 #if F_SETFD >= _ast_F_LOCAL && defined(FIOCLEX) 75 case F_SETFD: 76 n = va_arg(ap, int); 77 op = ioctl(fd, n == FD_CLOEXEC ? FIOCLEX : FIONCLEX, 0); 78 break; 79 #endif 80 default: 81 errno = EINVAL; 82 op = -1; 83 break; 84 } 85 else 86 #if _lib_fcntl 87 op = fcntl(fd, op, va_arg(ap, int)); 88 #else 89 { 90 errno = EINVAL; 91 op = -1; 92 } 93 #endif 94 va_end(ap); 95 return(op); 96 } 97 98 #endif 99