Return to ln.c CVS log

Up to [CSRG BSD Unix] / 43BSDReno / usr.bin / ln

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

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1987 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted provided
        !             6:  * that: (1) source distributions retain this entire copyright notice and
        !             7:  * comment, and (2) distributions including binaries display the following
        !             8:  * acknowledgement:  ``This product includes software developed by the
        !             9:  * University of California, Berkeley and its contributors'' in the
        !            10:  * documentation or other materials provided with the distribution and in
        !            11:  * all advertising materials mentioning features or use of this software.
        !            12:  * Neither the name of the University nor the names of its contributors may
        !            13:  * be used to endorse or promote products derived from this software without
        !            14:  * specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            16:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            17:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: char copyright[] =
        !            22: "@(#) Copyright (c) 1987 Regents of the University of California.\n\
        !            23:  All rights reserved.\n";
        !            24: #endif /* not lint */
        !            25: 
        !            26: #ifndef lint
        !            27: static char sccsid[] = "@(#)ln.c       4.13 (Berkeley) 6/19/90";
        !            28: #endif /* not lint */
        !            29: 
        !            30: #include <sys/param.h>
        !            31: #include <sys/stat.h>
        !            32: #include <stdio.h>
        !            33: #include <errno.h>
        !            34: 
        !            35: static int     dirflag,                        /* undocumented force flag */
        !            36:                sflag,                          /* symbolic, not hard, link */
        !            37:                (*linkf)();                     /* system link call */
        !            38: 
        !            39: main(argc, argv)
        !            40:        int     argc;
        !            41:        char    **argv;
        !            42: {
        !            43:        extern int optind;
        !            44:        struct stat buf;
        !            45:        int ch, exitval, link(), symlink();
        !            46:        char *sourcedir;
        !            47: 
        !            48:        while ((ch = getopt(argc, argv, "Fs")) != EOF)
        !            49:                switch((char)ch) {
        !            50:                case 'F':
        !            51:                        dirflag = 1;
        !            52:                        break;
        !            53:                case 's':
        !            54:                        sflag = 1;
        !            55:                        break;
        !            56:                case '?':
        !            57:                default:
        !            58:                        usage();
        !            59:                }
        !            60: 
        !            61:        argv += optind;
        !            62:        argc -= optind;
        !            63: 
        !            64:        linkf = sflag ? symlink : link;
        !            65: 
        !            66:        switch(argc) {
        !            67:        case 0:
        !            68:                usage();
        !            69:        case 1:                         /* ln target */
        !            70:                exit(linkit(argv[0], ".", 1));
        !            71:        case 2:                         /* ln target source */
        !            72:                exit(linkit(argv[0], argv[1], 0));
        !            73:        default:                        /* ln target1 target2 directory */
        !            74:                sourcedir = argv[argc - 1];
        !            75:                if (stat(sourcedir, &buf)) {
        !            76:                        perror(sourcedir);
        !            77:                        exit(1);
        !            78:                }
        !            79:                if ((buf.st_mode & S_IFMT) != S_IFDIR)
        !            80:                        usage();
        !            81:                for (exitval = 0; *argv != sourcedir; ++argv)
        !            82:                        exitval |= linkit(*argv, sourcedir, 1);
        !            83:                exit(exitval);
        !            84:        }
        !            85:        /*NOTREACHED*/
        !            86: }
        !            87: 
        !            88: static
        !            89: linkit(target, source, isdir)
        !            90:        char    *target, *source;
        !            91:        int     isdir;
        !            92: {
        !            93:        extern int      errno;
        !            94:        struct stat     buf;
        !            95:        char    path[MAXPATHLEN],
        !            96:                *cp, *rindex(), *strcpy();
        !            97: 
        !            98:        if (!sflag) {
        !            99:                /* if target doesn't exist, quit now */
        !           100:                if (stat(target, &buf)) {
        !           101:                        perror(target);
        !           102:                        return(1);
        !           103:                }
        !           104:                /* only symbolic links to directories, unless -F option used */
        !           105:                if (!dirflag && (buf.st_mode & S_IFMT) == S_IFDIR) {
        !           106:                        printf("%s is a directory.\n", target);
        !           107:                        return(1);
        !           108:                }
        !           109:        }
        !           110: 
        !           111:        /* if the source is a directory, append the target's name */
        !           112:        if (isdir || !stat(source, &buf) && (buf.st_mode & S_IFMT) == S_IFDIR) {
        !           113:                if (!(cp = rindex(target, '/')))
        !           114:                        cp = target;
        !           115:                else
        !           116:                        ++cp;
        !           117:                (void)sprintf(path, "%s/%s", source, cp);
        !           118:                source = path;
        !           119:        }
        !           120: 
        !           121:        if ((*linkf)(target, source)) {
        !           122:                perror(source);
        !           123:                return(1);
        !           124:        }
        !           125:        return(0);
        !           126: }
        !           127: 
        !           128: static
        !           129: usage()
        !           130: {
        !           131:        fputs("usage:\tln [-s] targetname [sourcename]\n\tln [-s] targetname1 targetname2 [... targetnameN] sourcedirectory\n", stderr);
        !           132:        exit(1);
        !           133: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.