| 1 | /*-
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| 2 | * Copyright (c) 1989, 1993
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| 3 | * The Regents of the University of California. All rights reserved.
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| 4 | *
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| 5 | * This code is derived from software contributed to Berkeley by
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| 6 | * Kevin Fall.
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| 7 | *
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| 8 | * Redistribution and use in source and binary forms, with or without
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| 9 | * modification, are permitted provided that the following conditions
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| 10 | * are met:
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| 11 | * 1. Redistributions of source code must retain the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer.
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer in the
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| 15 | * documentation and/or other materials provided with the distribution.
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| 16 | * 4. Neither the name of the University nor the names of its contributors
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| 17 | * may be used to endorse or promote products derived from this software
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| 18 | * without specific prior written permission.
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| 19 | *
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| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 30 | * SUCH DAMAGE.
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| 31 | */
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| 32 |
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| 33 | #if 0
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| 34 | #ifndef lint
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| 35 | static char const copyright[] =
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| 36 | "@(#) Copyright (c) 1989, 1993\n\
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| 37 | The Regents of the University of California. All rights reserved.\n";
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| 38 | #endif /* not lint */
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| 39 | #endif
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| 40 |
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| 41 | #ifndef lint
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| 42 | #if 0
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| 43 | static char sccsid[] = "@(#)cat.c 8.2 (Berkeley) 4/27/95";
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| 44 | #endif
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| 45 | #endif /* not lint */
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| 46 | #if 0
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| 47 | #include <sys/cdefs.h>
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| 48 | __FBSDID("$FreeBSD: src/bin/cat/cat.c,v 1.32 2005/01/10 08:39:20 imp Exp $");
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| 49 | #else
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| 50 | #define NO_UDOM_SUPPORT /* kmk */
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| 51 | #endif
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| 52 |
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| 53 | #ifndef _MSC_VER
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| 54 | # include <sys/param.h>
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| 55 | #endif
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| 56 | #include <sys/stat.h>
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| 57 | #ifndef NO_UDOM_SUPPORT
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| 58 | # include <sys/socket.h>
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| 59 | # include <sys/un.h>
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| 60 | # include <errno.h>
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| 61 | #endif
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| 62 |
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| 63 | #include <ctype.h>
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| 64 | #include "err.h"
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| 65 | #include <fcntl.h>
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| 66 | #include <locale.h>
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| 67 | #include <stdio.h>
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| 68 | #include <stdlib.h>
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| 69 | #include <string.h>
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| 70 | #include <unistd.h>
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| 71 | #include <stddef.h>
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| 72 |
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| 73 | #ifdef __sun__
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| 74 | # include "solfakes.h"
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| 75 | #endif
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| 76 | #ifdef _MSC_VER
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| 77 | # include "mscfakes.h"
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| 78 | #endif
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| 79 |
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| 80 | int bflag, eflag, nflag, sflag, tflag, vflag;
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| 81 | /*int rval;*/
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| 82 | const char *filename;
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| 83 |
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| 84 | static int usage(void);
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| 85 | static int scanfiles(char *argv[], int cooked);
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| 86 | static int cook_cat(FILE *);
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| 87 | static int raw_cat(int);
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| 88 |
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| 89 | #ifndef NO_UDOM_SUPPORT
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| 90 | static int udom_open(const char *path, int flags);
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| 91 | #endif
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| 92 |
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| 93 | int
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| 94 | kmk_builtin_cat(int argc, char *argv[])
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| 95 | {
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| 96 | int ch, rc;
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| 97 |
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| 98 | /* kmk: reinitialize globals */
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| 99 | bflag = eflag = nflag = sflag = tflag = vflag = 0;
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| 100 | filename = NULL;
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| 101 |
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| 102 | /* kmk: reset getopt and set progname */
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| 103 | g_progname = argv[0];
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| 104 | opterr = 1;
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| 105 | optarg = NULL;
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| 106 | optopt = 0;
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| 107 | #if defined(__FreeBSD__) || defined(__EMX__) || defined(__APPLE__)
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| 108 | optreset = 1;
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| 109 | optind = 1;
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| 110 | #else
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| 111 | optind = 0; /* init */
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| 112 | #endif
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| 113 |
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| 114 | #ifdef kmk_builtin_cat /* kmk did this already. */
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| 115 | setlocale(LC_CTYPE, "");
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| 116 | #endif
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| 117 |
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| 118 | while ((ch = getopt(argc, argv, "benstuv")) != -1)
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| 119 | switch (ch) {
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| 120 | case 'b':
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| 121 | bflag = nflag = 1; /* -b implies -n */
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| 122 | break;
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| 123 | case 'e':
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| 124 | eflag = vflag = 1; /* -e implies -v */
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| 125 | break;
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| 126 | case 'n':
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| 127 | nflag = 1;
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| 128 | break;
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| 129 | case 's':
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| 130 | sflag = 1;
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| 131 | break;
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| 132 | case 't':
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| 133 | tflag = vflag = 1; /* -t implies -v */
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| 134 | break;
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| 135 | case 'u':
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| 136 | setbuf(stdout, NULL);
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| 137 | break;
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| 138 | case 'v':
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| 139 | vflag = 1;
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| 140 | break;
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| 141 | default:
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| 142 | return usage();
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| 143 | }
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| 144 | argv += optind;
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| 145 |
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| 146 | if (bflag || eflag || nflag || sflag || tflag || vflag)
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| 147 | rc = scanfiles(argv, 1);
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| 148 | else
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| 149 | rc = scanfiles(argv, 0);
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| 150 | #ifdef kmk_builtin_cat /* only in the external program. */
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| 151 | if (fclose(stdout))
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| 152 | return err(1, "stdout");
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| 153 | #endif
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| 154 | return rc;
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| 155 | }
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| 156 |
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| 157 | static int
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| 158 | usage(void)
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| 159 | {
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| 160 | fprintf(stderr, "usage: cat [-benstuv] [file ...]\n");
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| 161 | return 1;
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| 162 | }
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| 163 |
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| 164 | static int
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| 165 | scanfiles(char *argv[], int cooked)
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| 166 | {
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| 167 | int i = 0;
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| 168 | char *path;
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| 169 | FILE *fp;
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| 170 | int rc2 = 0;
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| 171 | int rc = 0;
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| 172 |
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| 173 | while ((path = argv[i]) != NULL || i == 0) {
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| 174 | int fd;
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| 175 |
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| 176 | if (path == NULL || strcmp(path, "-") == 0) {
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| 177 | filename = "stdin";
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| 178 | fd = STDIN_FILENO;
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| 179 | } else {
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| 180 | filename = path;
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| 181 | fd = open(path, O_RDONLY);
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| 182 | #ifndef NO_UDOM_SUPPORT
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| 183 | if (fd < 0 && errno == EOPNOTSUPP)
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| 184 | fd = udom_open(path, O_RDONLY);
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| 185 | #endif
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| 186 | }
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| 187 | if (fd < 0) {
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| 188 | warn("%s", path);
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| 189 | rc2 = 1; /* non fatal */
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| 190 | } else if (cooked) {
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| 191 | if (fd == STDIN_FILENO)
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| 192 | rc = cook_cat(stdin);
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| 193 | else {
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| 194 | fp = fdopen(fd, "r");
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| 195 | rc = cook_cat(fp);
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| 196 | fclose(fp);
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| 197 | }
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| 198 | } else {
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| 199 | rc = raw_cat(fd);
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| 200 | if (fd != STDIN_FILENO)
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| 201 | close(fd);
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| 202 | }
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| 203 | if (rc || path == NULL)
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| 204 | break;
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| 205 | ++i;
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| 206 | }
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| 207 | return !rc ? rc2 : rc;
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| 208 | }
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| 209 |
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| 210 | static int
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| 211 | cook_cat(FILE *fp)
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| 212 | {
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| 213 | int ch, gobble, line, prev;
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| 214 | int rc = 0;
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| 215 |
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| 216 | /* Reset EOF condition on stdin. */
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| 217 | if (fp == stdin && feof(stdin))
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| 218 | clearerr(stdin);
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| 219 |
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| 220 | line = gobble = 0;
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| 221 | for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) {
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| 222 | if (prev == '\n') {
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| 223 | if (sflag) {
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| 224 | if (ch == '\n') {
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| 225 | if (gobble)
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| 226 | continue;
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| 227 | gobble = 1;
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| 228 | } else
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| 229 | gobble = 0;
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| 230 | }
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| 231 | if (nflag && (!bflag || ch != '\n')) {
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| 232 | (void)fprintf(stdout, "%6d\t", ++line);
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| 233 | if (ferror(stdout))
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| 234 | break;
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| 235 | }
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| 236 | }
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| 237 | if (ch == '\n') {
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| 238 | if (eflag && putchar('$') == EOF)
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| 239 | break;
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| 240 | } else if (ch == '\t') {
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| 241 | if (tflag) {
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| 242 | if (putchar('^') == EOF || putchar('I') == EOF)
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| 243 | break;
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| 244 | continue;
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| 245 | }
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| 246 | } else if (vflag) {
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| 247 | if (!isascii(ch) && !isprint(ch)) {
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| 248 | if (putchar('M') == EOF || putchar('-') == EOF)
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| 249 | break;
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| 250 | ch = toascii(ch);
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| 251 | }
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| 252 | if (iscntrl(ch)) {
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| 253 | if (putchar('^') == EOF ||
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| 254 | putchar(ch == '\177' ? '?' :
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| 255 | ch | 0100) == EOF)
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| 256 | break;
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| 257 | continue;
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| 258 | }
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| 259 | }
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| 260 | if (putchar(ch) == EOF)
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| 261 | break;
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| 262 | }
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| 263 | if (ferror(fp)) {
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| 264 | warn("%s", filename);
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| 265 | rc = 1;
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| 266 | clearerr(fp);
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| 267 | }
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| 268 | if (ferror(stdout))
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| 269 | return err(1, "stdout");
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| 270 | return rc;
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| 271 | }
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| 272 |
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| 273 | static int
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| 274 | raw_cat(int rfd)
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| 275 | {
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| 276 | int off, wfd;
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| 277 | ssize_t nr, nw;
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| 278 | static size_t bsize;
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| 279 | static char *buf = NULL;
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| 280 | struct stat sbuf;
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| 281 |
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| 282 | wfd = fileno(stdout);
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| 283 | if (buf == NULL) {
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| 284 | if (fstat(wfd, &sbuf))
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| 285 | return err(1, "%s", filename);
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| 286 | #ifdef _MSC_VER
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| 287 | bsize = 1024;
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| 288 | #else
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| 289 | bsize = MAX(sbuf.st_blksize, 1024);
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| 290 | #endif
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| 291 | if ((buf = malloc(bsize)) == NULL)
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| 292 | return err(1, "buffer");
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| 293 | }
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| 294 | while ((nr = read(rfd, buf, bsize)) > 0)
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| 295 | for (off = 0; nr; nr -= nw, off += nw)
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| 296 | if ((nw = write(wfd, buf + off, (size_t)nr)) < 0)
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| 297 | return err(1, "stdout");
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| 298 | if (nr < 0) {
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| 299 | warn("%s", filename);
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| 300 | return 1;
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| 301 | }
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| 302 | return 0;
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| 303 | }
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| 304 |
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| 305 | #ifndef NO_UDOM_SUPPORT
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| 306 |
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| 307 | static int
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| 308 | udom_open(const char *path, int flags)
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| 309 | {
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| 310 | struct sockaddr_un sou;
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| 311 | int fd;
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| 312 | unsigned int len;
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| 313 |
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| 314 | bzero(&sou, sizeof(sou));
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| 315 |
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| 316 | /*
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| 317 | * Construct the unix domain socket address and attempt to connect
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| 318 | */
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| 319 | fd = socket(AF_UNIX, SOCK_STREAM, 0);
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| 320 | if (fd >= 0) {
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| 321 | sou.sun_family = AF_UNIX;
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| 322 | if ((len = strlcpy(sou.sun_path, path,
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| 323 | sizeof(sou.sun_path))) >= sizeof(sou.sun_path)) {
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| 324 | errno = ENAMETOOLONG;
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| 325 | return (-1);
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| 326 | }
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| 327 | len = offsetof(struct sockaddr_un, sun_path[len+1]);
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| 328 |
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| 329 | if (connect(fd, (void *)&sou, len) < 0) {
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| 330 | close(fd);
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| 331 | fd = -1;
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| 332 | }
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| 333 | }
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| 334 |
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| 335 | /*
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| 336 | * handle the open flags by shutting down appropriate directions
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| 337 | */
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| 338 | if (fd >= 0) {
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| 339 | switch(flags & O_ACCMODE) {
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| 340 | case O_RDONLY:
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| 341 | if (shutdown(fd, SHUT_WR) == -1)
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| 342 | warn(NULL);
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| 343 | break;
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| 344 | case O_WRONLY:
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| 345 | if (shutdown(fd, SHUT_RD) == -1)
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| 346 | warn(NULL);
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| 347 | break;
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| 348 | default:
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| 349 | break;
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| 350 | }
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| 351 | }
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| 352 | return(fd);
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| 353 | }
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| 354 |
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| 355 | #endif
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