Mercurial > illumos > illumos-gate
annotate usr/src/lib/libc/port/stdio/_endopen.c @ 14015:e5fc7d0d7c24
3687 fopen() O_CLOEXEC support via the "e" flag
Reviewed by Robert Mustacchi <rm@joyent.com>
Reviewed by Richard Lowe <richlowe@richlowe.net>
Approved by Dan McDonald <danmcd@nexenta.com>
| author | Theo Schlossnagle <jesus@omniti.com> |
|---|---|
| date | Wed, 17 Apr 2013 10:28:26 -0400 |
| parents | febeba71273d |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * CDDL HEADER START | |
| 3 * | |
| 4 * The contents of this file are subject to the terms of the | |
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5 * Common Development and Distribution License (the "License"). |
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6 * You may not use this file except in compliance with the License. |
| 0 | 7 * |
| 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
| 9 * or http://www.opensolaris.org/os/licensing. | |
| 10 * See the License for the specific language governing permissions | |
| 11 * and limitations under the License. | |
| 12 * | |
| 13 * When distributing Covered Code, include this CDDL HEADER in each | |
| 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
| 15 * If applicable, add the following below this CDDL HEADER, with the | |
| 16 * fields enclosed by brackets "[]" replaced with your own identifying | |
| 17 * information: Portions Copyright [yyyy] [name of copyright owner] | |
| 18 * | |
| 19 * CDDL HEADER END | |
| 20 */ | |
| 6812 | 21 |
| 0 | 22 /* |
| 6812 | 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. |
| 0 | 24 * Use is subject to license terms. |
| 25 */ | |
| 26 | |
| 27 /* Copyright (c) 1988 AT&T */ | |
| 28 /* All Rights Reserved */ | |
| 29 | |
|
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30 /* Copyright (c) 2013 OmniTI Computer Consulting, Inc. All rights reserved. */ |
| 0 | 31 |
| 32 /* | |
| 33 * This routine is a special case, in that it is aware of | |
| 34 * both small and large file interfaces. It must be built | |
| 35 * in the small compilation environment. | |
| 36 */ | |
| 37 | |
| 38 #include "lint.h" | |
| 39 #include "file64.h" | |
| 40 #include <mtlib.h> | |
| 41 #include <sys/types.h> | |
| 42 #include <stdio.h> | |
| 43 #include <fcntl.h> | |
| 44 #include <unistd.h> | |
| 45 #include <limits.h> | |
| 46 #include <thread.h> | |
| 47 #include <synch.h> | |
| 48 #include "stdiom.h" | |
| 49 #include <errno.h> | |
| 50 | |
| 51 /* | |
| 52 * open UNIX file name, associate with iop | |
| 53 */ | |
| 54 | |
| 55 FILE * | |
| 56 _endopen(const char *name, const char *type, FILE *iop, int largefile) | |
| 57 { | |
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58 int oflag, fd, fflag, eflag, plusflag; |
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59 const char *echr; |
| 0 | 60 |
| 61 if (iop == NULL) | |
| 62 return (NULL); | |
| 63 switch (type[0]) { | |
| 64 default: | |
| 65 errno = EINVAL; | |
| 66 return (NULL); | |
| 67 case 'r': | |
| 68 oflag = O_RDONLY; | |
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69 fflag = _IOREAD; |
| 0 | 70 break; |
| 71 case 'w': | |
| 72 oflag = O_WRONLY | O_TRUNC | O_CREAT; | |
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73 fflag = _IOWRT; |
| 0 | 74 break; |
| 75 case 'a': | |
| 76 oflag = O_WRONLY | O_APPEND | O_CREAT; | |
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77 fflag = _IOWRT; |
| 0 | 78 break; |
| 79 } | |
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80 |
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81 plusflag = 0; |
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82 eflag = 0; |
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83 for (echr = type + 1; *echr != '\0'; echr++) { |
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84 switch (*echr) { |
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85 /* UNIX ignores 'b' and treats text and binary the same */ |
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86 default: |
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87 break; |
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88 case '+': |
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89 plusflag = 1; |
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90 break; |
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91 case 'e': |
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92 eflag = 1; |
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93 break; |
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94 } |
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parents:
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95 } |
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3687 fopen() O_CLOEXEC support via the "e" flag
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parents:
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96 if (eflag) { |
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3687 fopen() O_CLOEXEC support via the "e" flag
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parents:
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97 /* Subsequent to a mode flag, 'e' indicates O_CLOEXEC */ |
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e5fc7d0d7c24
3687 fopen() O_CLOEXEC support via the "e" flag
Theo Schlossnagle <jesus@omniti.com>
parents:
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98 oflag = oflag | O_CLOEXEC; |
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3687 fopen() O_CLOEXEC support via the "e" flag
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parents:
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99 } |
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3687 fopen() O_CLOEXEC support via the "e" flag
Theo Schlossnagle <jesus@omniti.com>
parents:
6812
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100 if (plusflag) { |
| 0 | 101 oflag = (oflag & ~(O_RDONLY | O_WRONLY)) | O_RDWR; |
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102 fflag = _IORW; |
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103 } |
| 0 | 104 |
| 105 /* select small or large file open based on flag */ | |
| 106 if (largefile) { | |
| 107 fd = open64(name, oflag, 0666); | |
| 108 } else { | |
| 109 fd = open(name, oflag, 0666); | |
| 110 } | |
| 111 if (fd < 0) | |
| 112 return (NULL); | |
| 113 | |
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114 /* As long as we make sure _flag stays != 0, we don't need to lock */ |
| 0 | 115 #ifdef _LP64 |
| 116 iop->_file = fd; | |
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117 iop->_flag = (iop->_flag & ~0377) | fflag; |
| 0 | 118 #else |
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119 if (fd <= _FILE_FD_MAX) { |
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120 SET_FILE(iop, fd); |
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121 } else if (_file_set(iop, fd, type) != 0) { |
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122 /* errno set in _file_set() */ |
| 0 | 123 (void) close(fd); |
| 124 return (NULL); | |
| 125 } | |
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126 iop->_flag = fflag; |
| 0 | 127 #endif /* _LP64 */ |
| 128 | |
| 129 if (oflag == (O_WRONLY | O_APPEND | O_CREAT)) { /* type == "a" */ | |
| 130 if (lseek64(fd, (off64_t)0, SEEK_END) < (off64_t)0) { | |
| 131 (void) close(fd); | |
| 132 return (NULL); | |
| 133 } | |
| 134 } | |
| 135 | |
| 136 return (iop); | |
| 137 } |