| 1 | #include <stdio.h> |
| 2 | #include <ctype.h> |
| 3 | |
| 4 | main(argc, argv) |
| 5 | int argc; |
| 6 | char *argv[]; |
| 7 | { |
| 8 | |
| 9 | argc--, argv++; |
| 10 | if (argc == 0) { |
| 11 | usage: |
| 12 | fprintf(stderr, "apropos word ...\n"); |
| 13 | exit(1); |
| 14 | } |
| 15 | if (freopen("/usr/lib/whatis", "r", stdin) == NULL) { |
| 16 | perror("/usr/lib/whatis"); |
| 17 | exit (1); |
| 18 | } |
| 19 | argv[argc] = 0; |
| 20 | apropos(argv); |
| 21 | exit(0); |
| 22 | } |
| 23 | |
| 24 | apropos(argv) |
| 25 | char **argv; |
| 26 | { |
| 27 | char buf[BUFSIZ]; |
| 28 | char *gotit; |
| 29 | register char **vp; |
| 30 | |
| 31 | gotit = (char *) calloc(1, blklen(argv)); |
| 32 | while (fgets(buf, sizeof buf, stdin) != NULL) |
| 33 | for (vp = argv; *vp; vp++) |
| 34 | if (match(buf, *vp)) { |
| 35 | printf("%s", buf); |
| 36 | gotit[vp - argv] = 1; |
| 37 | for (vp++; *vp; vp++) |
| 38 | if (match(buf, *vp)) |
| 39 | gotit[vp - argv] = 1; |
| 40 | break; |
| 41 | } |
| 42 | for (vp = argv; *vp; vp++) |
| 43 | if (gotit[vp - argv] == 0) |
| 44 | printf("%s: nothing apropriate\n", *vp); |
| 45 | } |
| 46 | |
| 47 | match(buf, str) |
| 48 | char *buf, *str; |
| 49 | { |
| 50 | register char *bp, *cp; |
| 51 | |
| 52 | bp = buf; |
| 53 | for (;;) { |
| 54 | if (*bp == 0) |
| 55 | return (0); |
| 56 | if (amatch(bp, str)) |
| 57 | return (1); |
| 58 | bp++; |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | amatch(cp, dp) |
| 63 | register char *cp, *dp; |
| 64 | { |
| 65 | |
| 66 | while (*cp && *dp && lmatch(*cp, *dp)) |
| 67 | cp++, dp++; |
| 68 | if (*dp == 0) |
| 69 | return (1); |
| 70 | return (0); |
| 71 | } |
| 72 | |
| 73 | lmatch(c, d) |
| 74 | char c, d; |
| 75 | { |
| 76 | |
| 77 | if (c == d) |
| 78 | return (1); |
| 79 | if (!isalpha(c) || !isalpha(d)) |
| 80 | return (0); |
| 81 | if (islower(c)) |
| 82 | c = toupper(c); |
| 83 | if (islower(d)) |
| 84 | d = toupper(d); |
| 85 | return (c == d); |
| 86 | } |
| 87 | |
| 88 | blklen(ip) |
| 89 | register int *ip; |
| 90 | { |
| 91 | register int i = 0; |
| 92 | |
| 93 | while (*ip++) |
| 94 | i++; |
| 95 | return (i); |
| 96 | } |