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Annotation of 43BSDReno/usr.bin/tee/tee.c, revision 1.1.1.1

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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