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

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.