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Annotation of src/usr.bin/tee/tee.c, Revision 1.3

1.3     ! mpech       1: /*     $OpenBSD: tee.c,v 1.2 1996/06/26 05:40:32 deraadt Exp $ */
1.1       deraadt     2: /*     $NetBSD: tee.c,v 1.5 1994/12/09 01:43:39 jtc Exp $      */
                      3:
                      4: /*
                      5:  * Copyright (c) 1988, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. All advertising materials mentioning features or use of this software
                     17:  *    must display the following acknowledgement:
                     18:  *     This product includes software developed by the University of
                     19:  *     California, Berkeley and its contributors.
                     20:  * 4. Neither the name of the University nor the names of its contributors
                     21:  *    may be used to endorse or promote products derived from this software
                     22:  *    without specific prior written permission.
                     23:  *
                     24:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     25:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     26:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     27:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     28:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     29:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     30:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     31:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     32:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     33:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     34:  * SUCH DAMAGE.
                     35:  */
                     36:
                     37: #ifndef lint
                     38: static char copyright[] =
                     39: "@(#) Copyright (c) 1988, 1993\n\
                     40:        The Regents of the University of California.  All rights reserved.\n";
                     41: #endif /* not lint */
                     42:
                     43: #ifndef lint
                     44: #if 0
                     45: static char sccsid[] = "@(#)tee.c      8.1 (Berkeley) 6/6/93";
                     46: #endif
1.3     ! mpech      47: static char rcsid[] = "$OpenBSD: tee.c,v 1.2 1996/06/26 05:40:32 deraadt Exp $";
1.1       deraadt    48: #endif
                     49:
                     50: #include <sys/types.h>
                     51: #include <sys/stat.h>
                     52: #include <signal.h>
                     53: #include <errno.h>
                     54: #include <fcntl.h>
                     55: #include <unistd.h>
                     56: #include <stdio.h>
                     57: #include <stdlib.h>
                     58: #include <string.h>
                     59: #include <locale.h>
                     60: #include <err.h>
                     61:
                     62: typedef struct _list {
                     63:        struct _list *next;
                     64:        int fd;
                     65:        char *name;
                     66: } LIST;
                     67: LIST *head;
                     68:
                     69: void add __P((int, char *));
                     70:
                     71: int
                     72: main(argc, argv)
                     73:        int argc;
                     74:        char *argv[];
                     75: {
1.3     ! mpech      76:        LIST *p;
        !            77:        int n, fd, rval, wval;
        !            78:        char *bp;
1.1       deraadt    79:        int append, ch, exitval;
                     80:        char *buf;
                     81: #define        BSIZE (8 * 1024)
                     82:
                     83:        setlocale(LC_ALL, "");
                     84:
                     85:        append = 0;
                     86:        while ((ch = getopt(argc, argv, "ai")) != -1)
                     87:                switch((char)ch) {
                     88:                case 'a':
                     89:                        append = 1;
                     90:                        break;
                     91:                case 'i':
                     92:                        (void)signal(SIGINT, SIG_IGN);
                     93:                        break;
                     94:                case '?':
                     95:                default:
                     96:                        (void)fprintf(stderr, "usage: tee [-ai] [file ...]\n");
                     97:                        exit(1);
                     98:                }
                     99:        argv += optind;
                    100:        argc -= optind;
                    101:
                    102:        if ((buf = malloc((size_t)BSIZE)) == NULL)
                    103:                err(1, NULL);
                    104:
                    105:        add(STDOUT_FILENO, "stdout");
                    106:
                    107:        for (exitval = 0; *argv; ++argv)
                    108:                if ((fd = open(*argv, append ? O_WRONLY|O_CREAT|O_APPEND :
                    109:                    O_WRONLY|O_CREAT|O_TRUNC, DEFFILEMODE)) < 0) {
                    110:                        warn("%s", *argv);
                    111:                        exitval = 1;
                    112:                } else
                    113:                        add(fd, *argv);
                    114:
                    115:        while ((rval = read(STDIN_FILENO, buf, BSIZE)) > 0)
                    116:                for (p = head; p; p = p->next) {
                    117:                        n = rval;
                    118:                        bp = buf;
                    119:                        do {
                    120:                                if ((wval = write(p->fd, bp, n)) == -1) {
                    121:                                        warn("%s", p->name);
                    122:                                        exitval = 1;
                    123:                                        break;
                    124:                                }
                    125:                                bp += wval;
                    126:                        } while (n -= wval);
                    127:                }
                    128:        if (rval < 0) {
                    129:                warn("read");
                    130:                exitval = 1;
                    131:        }
                    132:
                    133:        for (p = head; p; p = p->next) {
                    134:                if (close(p->fd) == -1) {
                    135:                        warn("%s", p->name);
                    136:                        exitval = 1;
                    137:                }
                    138:        }
                    139:
                    140:        exit(exitval);
                    141: }
                    142:
                    143: void
                    144: add(fd, name)
                    145:        int fd;
                    146:        char *name;
                    147: {
                    148:        LIST *p;
                    149:
                    150:        if ((p = malloc((size_t)sizeof(LIST))) == NULL)
                    151:                err(1, NULL);
                    152:        p->fd = fd;
                    153:        p->name = name;
                    154:        p->next = head;
                    155:        head = p;
                    156: }