1*4887Schin /*********************************************************************** 2*4887Schin * * 3*4887Schin * This software is part of the ast package * 4*4887Schin * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5*4887Schin * and is licensed under the * 6*4887Schin * Common Public License, Version 1.0 * 7*4887Schin * by AT&T Knowledge Ventures * 8*4887Schin * * 9*4887Schin * A copy of the License is available at * 10*4887Schin * http://www.opensource.org/licenses/cpl1.0.txt * 11*4887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12*4887Schin * * 13*4887Schin * Information and Software Systems Research * 14*4887Schin * AT&T Research * 15*4887Schin * Florham Park NJ * 16*4887Schin * * 17*4887Schin * Glenn Fowler <gsf@research.att.com> * 18*4887Schin * David Korn <dgk@research.att.com> * 19*4887Schin * Phong Vo <kpv@research.att.com> * 20*4887Schin * * 21*4887Schin ***********************************************************************/ 22*4887Schin #pragma prototyped 23*4887Schin 24*4887Schin /* 25*4887Schin * -last 3 arg open 26*4887Schin */ 27*4887Schin 28*4887Schin #include <ast.h> 29*4887Schin 30*4887Schin #if !defined(open) || !defined(_ast_O_LOCAL) 31*4887Schin 32*4887Schin NoN(open) 33*4887Schin 34*4887Schin #else 35*4887Schin 36*4887Schin #undef open 37*4887Schin 38*4887Schin extern int open(const char*, int, ...); 39*4887Schin 40*4887Schin #include <ls.h> 41*4887Schin #include <error.h> 42*4887Schin 43*4887Schin #ifdef O_NOCTTY 44*4887Schin #include <ast_tty.h> 45*4887Schin #endif 46*4887Schin 47*4887Schin int 48*4887Schin _ast_open(const char* path, int op, ...) 49*4887Schin { 50*4887Schin int fd; 51*4887Schin int mode; 52*4887Schin int save_errno; 53*4887Schin struct stat st; 54*4887Schin va_list ap; 55*4887Schin 56*4887Schin save_errno = errno; 57*4887Schin va_start(ap, op); 58*4887Schin mode = (op & O_CREAT) ? va_arg(ap, int) : S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH; 59*4887Schin va_end(ap); 60*4887Schin if (op & ~(_ast_O_LOCAL-1)) 61*4887Schin { 62*4887Schin if (!(op & O_CREAT)) 63*4887Schin op &= ~O_EXCL; 64*4887Schin for (;;) 65*4887Schin { 66*4887Schin if (op & O_TRUNC) 67*4887Schin { 68*4887Schin if ((op & O_EXCL) && !access(path, F_OK)) 69*4887Schin { 70*4887Schin errno = EEXIST; 71*4887Schin return(-1); 72*4887Schin } 73*4887Schin if ((fd = creat(path, (op & O_EXCL) ? 0 : mode)) < 0) 74*4887Schin return(-1); 75*4887Schin if (op & O_EXCL) 76*4887Schin { 77*4887Schin if (fstat(fd, &st) || (st.st_mode & S_IPERM)) 78*4887Schin { 79*4887Schin errno = EEXIST; 80*4887Schin close(fd); 81*4887Schin return(-1); 82*4887Schin } 83*4887Schin #if _lib_fchmod 84*4887Schin if (mode && fchmod(fd, mode)) 85*4887Schin #else 86*4887Schin if (mode && chmod(path, mode)) 87*4887Schin #endif 88*4887Schin errno = save_errno; 89*4887Schin } 90*4887Schin if ((op & O_ACCMODE) == O_RDWR) 91*4887Schin { 92*4887Schin close(fd); 93*4887Schin op &= ~(O_CREAT|O_TRUNC); 94*4887Schin continue; 95*4887Schin } 96*4887Schin } 97*4887Schin else if ((fd = open(path, op & (_ast_O_LOCAL-1), mode)) < 0) 98*4887Schin { 99*4887Schin if (op & O_CREAT) 100*4887Schin { 101*4887Schin op |= O_TRUNC; 102*4887Schin continue; 103*4887Schin } 104*4887Schin return(-1); 105*4887Schin } 106*4887Schin else if ((op & O_APPEND) && lseek(fd, 0L, SEEK_END) == -1L) 107*4887Schin errno = save_errno; 108*4887Schin #if O_NOCTTY 109*4887Schin if ((op & O_NOCTTY) && ioctl(fd, TIOCNOTTY, 0)) 110*4887Schin errno = save_errno; 111*4887Schin #endif 112*4887Schin break; 113*4887Schin } 114*4887Schin } 115*4887Schin else fd = open(path, op, mode); 116*4887Schin return(fd); 117*4887Schin } 118*4887Schin 119*4887Schin #endif 120