Commit | Line | Data |
---|---|---|
8fb84ebd | 1 | /* |
7a909b83 | 2 | * Copyright (c) 1987 Regents of the University of California. |
a754946e KB |
3 | * All rights reserved. |
4 | * | |
f15db449 | 5 | * %sccs.include.redist.c% |
8fb84ebd | 6 | */ |
7a909b83 | 7 | |
a754946e | 8 | #ifndef lint |
7a909b83 KB |
9 | char copyright[] = |
10 | "@(#) Copyright (c) 1987 Regents of the University of California.\n\ | |
11 | All rights reserved.\n"; | |
a754946e | 12 | #endif /* not lint */ |
7a909b83 | 13 | |
a754946e | 14 | #ifndef lint |
337f474e | 15 | static char sccsid[] = "@(#)ln.c 4.15 (Berkeley) %G%"; |
a754946e | 16 | #endif /* not lint */ |
7a909b83 KB |
17 | |
18 | #include <sys/param.h> | |
8fb84ebd | 19 | #include <sys/stat.h> |
7a909b83 | 20 | #include <stdio.h> |
56abc04a | 21 | #include <errno.h> |
be183d1e | 22 | #include <string.h> |
337f474e DS |
23 | #include <stdlib.h> |
24 | #include <unistd.h> | |
8fb84ebd | 25 | |
fd5596d8 | 26 | static int dirflag, /* undocumented force flag */ |
7a909b83 KB |
27 | sflag, /* symbolic, not hard, link */ |
28 | (*linkf)(); /* system link call */ | |
337f474e | 29 | static linkit(), usage(); |
8fb84ebd BJ |
30 | |
31 | main(argc, argv) | |
be183d1e KB |
32 | int argc; |
33 | char **argv; | |
8fb84ebd | 34 | { |
fd5596d8 KB |
35 | extern int optind; |
36 | struct stat buf; | |
37 | int ch, exitval, link(), symlink(); | |
38 | char *sourcedir; | |
8fb84ebd | 39 | |
fd5596d8 | 40 | while ((ch = getopt(argc, argv, "Fs")) != EOF) |
7a909b83 | 41 | switch((char)ch) { |
fd5596d8 KB |
42 | case 'F': |
43 | dirflag = 1; | |
7a909b83 KB |
44 | break; |
45 | case 's': | |
46 | sflag = 1; | |
47 | break; | |
48 | case '?': | |
49 | default: | |
50 | usage(); | |
51 | } | |
52 | ||
53 | argv += optind; | |
54 | argc -= optind; | |
55 | ||
56 | linkf = sflag ? symlink : link; | |
57 | ||
58 | switch(argc) { | |
59 | case 0: | |
60 | usage(); | |
61 | case 1: /* ln target */ | |
62 | exit(linkit(argv[0], ".", 1)); | |
63 | case 2: /* ln target source */ | |
64 | exit(linkit(argv[0], argv[1], 0)); | |
65 | default: /* ln target1 target2 directory */ | |
66 | sourcedir = argv[argc - 1]; | |
67 | if (stat(sourcedir, &buf)) { | |
be183d1e KB |
68 | (void)fprintf(stderr, |
69 | "ln: %s: %s\n", sourcedir, strerror(errno)); | |
7a909b83 KB |
70 | exit(1); |
71 | } | |
be183d1e | 72 | if (!S_ISDIR(buf.st_mode)) |
7a909b83 KB |
73 | usage(); |
74 | for (exitval = 0; *argv != sourcedir; ++argv) | |
75 | exitval |= linkit(*argv, sourcedir, 1); | |
76 | exit(exitval); | |
8fb84ebd | 77 | } |
be183d1e | 78 | /* NOTREACHED */ |
8fb84ebd BJ |
79 | } |
80 | ||
7a909b83 KB |
81 | static |
82 | linkit(target, source, isdir) | |
be183d1e KB |
83 | char *target, *source; |
84 | int isdir; | |
8fb84ebd | 85 | { |
be183d1e KB |
86 | struct stat buf; |
87 | char path[MAXPATHLEN], *cp; | |
8fb84ebd | 88 | |
7a909b83 KB |
89 | if (!sflag) { |
90 | /* if target doesn't exist, quit now */ | |
91 | if (stat(target, &buf)) { | |
be183d1e KB |
92 | (void)fprintf(stderr, |
93 | "ln: %s: %s\n", target, strerror(errno)); | |
7a909b83 KB |
94 | return(1); |
95 | } | |
fd5596d8 KB |
96 | /* only symbolic links to directories, unless -F option used */ |
97 | if (!dirflag && (buf.st_mode & S_IFMT) == S_IFDIR) { | |
be183d1e | 98 | (void)printf("ln: %s is a directory.\n", target); |
7a909b83 KB |
99 | return(1); |
100 | } | |
8fb84ebd | 101 | } |
7a909b83 KB |
102 | |
103 | /* if the source is a directory, append the target's name */ | |
104 | if (isdir || !stat(source, &buf) && (buf.st_mode & S_IFMT) == S_IFDIR) { | |
105 | if (!(cp = rindex(target, '/'))) | |
106 | cp = target; | |
1bfeaa36 | 107 | else |
7a909b83 KB |
108 | ++cp; |
109 | (void)sprintf(path, "%s/%s", source, cp); | |
110 | source = path; | |
8fb84ebd | 111 | } |
7a909b83 KB |
112 | |
113 | if ((*linkf)(target, source)) { | |
be183d1e | 114 | (void)fprintf(stderr, "ln: %s: %s\n", source, strerror(errno)); |
7a909b83 | 115 | return(1); |
8fb84ebd | 116 | } |
7a909b83 KB |
117 | return(0); |
118 | } | |
119 | ||
120 | static | |
121 | usage() | |
122 | { | |
be183d1e KB |
123 | (void)fprintf(stderr, |
124 | "usage:\tln [-s] file1 file2\n\tln [-s] file ... directory\n"); | |
7a909b83 | 125 | exit(1); |
8fb84ebd | 126 | } |