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Annotation of 43BSDReno/usr.bin/tee/tee.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may be used to endorse or promote products derived
        !            14:  * from this software without specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: char copyright[] =
        !            22: "@(#) Copyright (c) 1988 Regents of the University of California.\n\
        !            23:  All rights reserved.\n";
        !            24: #endif /* not lint */
        !            25: 
        !            26: #ifndef lint
        !            27: static char sccsid[] = "@(#)tee.c      5.10 (Berkeley) 6/1/90";
        !            28: #endif /* not lint */
        !            29: 
        !            30: #include <sys/types.h>
        !            31: #include <sys/file.h>
        !            32: #include <signal.h>
        !            33: #include <stdio.h>
        !            34: #include <unistd.h>
        !            35: 
        !            36: typedef struct _list {
        !            37:        struct _list *next;
        !            38:        int fd;
        !            39:        char *name;
        !            40: } LIST;
        !            41: LIST *head;
        !            42: 
        !            43: main(argc, argv)
        !            44:        int argc;
        !            45:        char **argv;
        !            46: {
        !            47:        extern int errno, optind;
        !            48:        register LIST *p;
        !            49:        register int n, fd, rval, wval;
        !            50:        register char *bp;
        !            51:        int append, ch, exitval;
        !            52:        char *buf, *malloc(), *strerror();
        !            53:        off_t lseek();
        !            54: 
        !            55:        append = 0;
        !            56:        while ((ch = getopt(argc, argv, "ai")) != EOF)
        !            57:                switch((char)ch) {
        !            58:                case 'a':
        !            59:                        append = 1;
        !            60:                        break;
        !            61:                case 'i':
        !            62:                        (void)signal(SIGINT, SIG_IGN);
        !            63:                        break;
        !            64:                case '?':
        !            65:                default:
        !            66:                        (void)fprintf(stderr, "usage: tee [-ai] [file ...]\n");
        !            67:                        exit(1);
        !            68:                }
        !            69:        argv += optind;
        !            70:        argc -= optind;
        !            71: 
        !            72:        if (!(buf = malloc((u_int)8 * 1024))) {
        !            73:                (void)fprintf(stderr, "tee: out of space.\n");
        !            74:                exit(1);
        !            75:        }
        !            76:        add(STDOUT_FILENO, "stdout");
        !            77:        for (; *argv; ++argv)
        !            78:                if ((fd = open(*argv, append ? O_WRONLY|O_CREAT|O_APPEND :
        !            79:                    O_WRONLY|O_CREAT|O_TRUNC, 0600)) < 0)
        !            80:                        (void)fprintf(stderr, "tee: %s: %s.\n",
        !            81:                            *argv, strerror(errno));
        !            82:                else
        !            83:                        add(fd, *argv);
        !            84:        exitval = 0;
        !            85:        while ((rval = read(STDIN_FILENO, buf, sizeof(buf))) > 0)
        !            86:                for (p = head; p; p = p->next) {
        !            87:                        n = rval;
        !            88:                        bp = buf;
        !            89:                        do {
        !            90:                                if ((wval = write(p->fd, bp, n)) == -1) {
        !            91:                                        (void)fprintf(stderr, "tee: %s: %s.\n",
        !            92:                                            p->name, strerror(errno));
        !            93:                                        exitval = 1;
        !            94:                                        break;
        !            95:                                }
        !            96:                                bp += wval;
        !            97:                        } while (n -= wval);
        !            98:                }
        !            99:        if (rval < 0) {
        !           100:                (void)fprintf(stderr, "tee: read: %s\n", strerror(errno));
        !           101:                exit(1);
        !           102:        }
        !           103:        exit(exitval);
        !           104: }
        !           105: 
        !           106: add(fd, name)
        !           107:        int fd;
        !           108:        char *name;
        !           109: {
        !           110:        LIST *p;
        !           111:        char *malloc(), *strerror();
        !           112: 
        !           113:        /* NOSTRICT */
        !           114:        if (!(p = (LIST *)malloc((u_int)sizeof(LIST)))) {
        !           115:                (void)fprintf(stderr, "tee: out of space.\n");
        !           116:                exit(1);
        !           117:        }
        !           118:        p->fd = fd;
        !           119:        p->name = name;
        !           120:        p->next = head;
        !           121:        head = p;
        !           122: }

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