projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| ca5a877f BJ |
1 | static char *sccsid = "@(#)strings.c 4.1 (Berkeley) %G%"; |
| 2 | #include <stdio.h> | |
| 3 | #include <a.out.h> | |
| 4 | #include <ctype.h> | |
| 5 | ||
| 6 | long ftell(); | |
| 7 | ||
| 8 | /* | |
| 9 | * strings | |
| 10 | */ | |
| 11 | ||
| 12 | struct exec header; | |
| 13 | ||
| 14 | char *infile = "Standard input"; | |
| 15 | int oflg; | |
| 16 | int asdata; | |
| 17 | long offset; | |
| 18 | int minlength = 4; | |
| 19 | ||
| 20 | main(argc, argv) | |
| 21 | int argc; | |
| 22 | char *argv[]; | |
| 23 | { | |
| 24 | ||
| 25 | argc--, argv++; | |
| 26 | while (argc > 0 && argv[0][0] == '-') { | |
| 27 | register int i; | |
| 28 | if (argv[0][1] == 0) | |
| 29 | asdata++; | |
| 30 | else for (i = 1; argv[0][i] != 0; i++) switch (argv[0][i]) { | |
| 31 | ||
| 32 | case 'o': | |
| 33 | oflg++; | |
| 34 | break; | |
| 35 | ||
| 36 | case 'a': | |
| 37 | asdata++; | |
| 38 | break; | |
| 39 | ||
| 40 | default: | |
| 41 | if (!isdigit(argv[0][i])) { | |
| 42 | fprintf(stderr, "Usage: strings [ -a ] [ -o ] [ -# ] [ file ... ]\n"); | |
| 43 | exit(1); | |
| 44 | } | |
| 45 | minlength = argv[0][i] - '0'; | |
| 46 | for (i++; isdigit(argv[0][i]); i++) | |
| 47 | minlength = minlength * 10 + argv[0][i] - '0'; | |
| 48 | i--; | |
| 49 | break; | |
| 50 | } | |
| 51 | argc--, argv++; | |
| 52 | } | |
| 53 | do { | |
| 54 | if (argc > 0) { | |
| 55 | if (freopen(argv[0], "r", stdin) == NULL) { | |
| 56 | perror(argv[0]); | |
| 57 | exit(1); | |
| 58 | } | |
| 59 | infile = argv[0]; | |
| 60 | argc--, argv++; | |
| 61 | } | |
| 62 | fseek(stdin, (long) 0, 0); | |
| 63 | if (asdata || | |
| 64 | fread((char *)&header, sizeof header, 1, stdin) != 1 || | |
| 65 | N_BADMAG(header)) { | |
| 66 | fseek(stdin, (long) 0, 0); | |
| 67 | find((long) 100000000L); | |
| 68 | continue; | |
| 69 | } | |
| 70 | fseek(stdin, (long) N_TXTOFF(header)+header.a_text, 1); | |
| 71 | find((long) header.a_data); | |
| 72 | } while (argc > 0); | |
| 73 | } | |
| 74 | ||
| 75 | find(cnt) | |
| 76 | long cnt; | |
| 77 | { | |
| 78 | static char buf[BUFSIZ]; | |
| 79 | register char *cp; | |
| 80 | register int c, cc; | |
| 81 | ||
| 82 | cp = buf, cc = 0; | |
| 83 | for (; cnt != 0; cnt--) { | |
| 84 | c = getc(stdin); | |
| 85 | if (c == '\n' || dirt(c) || cnt == 0) { | |
| 86 | if (cp > buf && cp[-1] == '\n') | |
| 87 | --cp; | |
| 88 | *cp++ = 0; | |
| 89 | if (cp > &buf[minlength]) { | |
| 90 | if (oflg) | |
| 91 | printf("%7D ", ftell(stdin) - cc - 1); | |
| 92 | printf("%s\n", buf); | |
| 93 | } | |
| 94 | cp = buf, cc = 0; | |
| 95 | } else { | |
| 96 | if (cp < &buf[sizeof buf - 2]) | |
| 97 | *cp++ = c; | |
| 98 | cc++; | |
| 99 | } | |
| 100 | if (ferror(stdin) || feof(stdin)) | |
| 101 | break; | |
| 102 | } | |
| 103 | } | |
| 104 | ||
| 105 | dirt(c) | |
| 106 | int c; | |
| 107 | { | |
| 108 | ||
| 109 | switch (c) { | |
| 110 | ||
| 111 | case '\n': | |
| 112 | case '\f': | |
| 113 | return (0); | |
| 114 | ||
| 115 | case 0177: | |
| 116 | return (1); | |
| 117 | ||
| 118 | default: | |
| 119 | return (c > 0200 || c < ' '); | |
| 120 | } | |
| 121 | } |