57 lines
928 B
C
57 lines
928 B
C
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/* See LICENSE file for copyright and license details. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include "util.h"
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static void dostrings(FILE *fp, const char *fname);
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static void
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usage(void)
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{
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eprintf("usage: %s file\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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FILE *fp;
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ARGBEGIN {
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default:
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usage();
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} ARGEND;
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if (argc > 0) {
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if (!(fp = fopen(argv[0], "r")))
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eprintf("open %s:", argv[0]);
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dostrings(fp, argv[0]);
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fclose(fp);
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} else {
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dostrings(stdin, "<stdin>");
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}
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return 0;
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}
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static void
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dostrings(FILE *fp, const char *fname)
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{
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unsigned char buf[BUFSIZ];
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int c, i = 0;
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off_t offset = 0;
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do {
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offset++;
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if (isprint(c = getc(fp)))
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buf[i++] = c;
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if ((!isprint(c) && i >= 6) || i == sizeof(buf) - 1) {
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buf[i] = '\0';
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printf("%8ld: %s\n", (long)offset - i - 1, buf);
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i = 0;
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}
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} while (c != EOF);
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if (ferror(fp))
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eprintf("%s: read error:", fname);
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}
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