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head.c (100575) head.c (165940)
1/*
2 * Copyright (c) 1980, 1987, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)head.c 8.2 (Berkeley) 5/4/95";
43#endif
44#endif /* not lint */
45#include <sys/cdefs.h>
1/*
2 * Copyright (c) 1980, 1987, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)head.c 8.2 (Berkeley) 5/4/95";
43#endif
44#endif /* not lint */
45#include <sys/cdefs.h>
46__FBSDID("$FreeBSD: head/usr.bin/head/head.c 100575 2002-07-23 14:39:20Z jmallett $");
46__FBSDID("$FreeBSD: head/usr.bin/head/head.c 165940 2007-01-11 17:03:51Z brooks $");
47
48#include <sys/types.h>
49
50#include <ctype.h>
51#include <err.h>
47
48#include <sys/types.h>
49
50#include <ctype.h>
51#include <err.h>
52#include <inttypes.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55#include <unistd.h>
56
57/*
58 * head - give the first few lines of a stream or of each of a set of files
59 *
60 * Bill Joy UCB August 24, 1977
61 */
62
63static void head(FILE *, int);
53#include <stdio.h>
54#include <stdlib.h>
55#include <string.h>
56#include <unistd.h>
57
58/*
59 * head - give the first few lines of a stream or of each of a set of files
60 *
61 * Bill Joy UCB August 24, 1977
62 */
63
64static void head(FILE *, int);
64static void head_bytes(FILE *, size_t);
65static void head_bytes(FILE *, off_t);
65static void obsolete(char *[]);
66static void usage(void);
67
68int
69main(int argc, char *argv[])
70{
71 int ch;
72 FILE *fp;
66static void obsolete(char *[]);
67static void usage(void);
68
69int
70main(int argc, char *argv[])
71{
72 int ch;
73 FILE *fp;
73 int first, linecnt = -1, bytecnt = -1, eval = 0;
74 int first, linecnt = -1, eval = 0;
75 off_t bytecnt = -1;
74 char *ep;
75
76 obsolete(argv);
77 while ((ch = getopt(argc, argv, "n:c:")) != -1)
78 switch(ch) {
79 case 'c':
76 char *ep;
77
78 obsolete(argv);
79 while ((ch = getopt(argc, argv, "n:c:")) != -1)
80 switch(ch) {
81 case 'c':
80 bytecnt = strtol(optarg, &ep, 10);
82 bytecnt = strtoimax(optarg, &ep, 10);
81 if (*ep || bytecnt <= 0)
82 errx(1, "illegal byte count -- %s", optarg);
83 break;
84 case 'n':
85 linecnt = strtol(optarg, &ep, 10);
86 if (*ep || linecnt <= 0)
87 errx(1, "illegal line count -- %s", optarg);
88 break;

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133 error = fwrite(cp, sizeof(char), readlen, stdout);
134 if (error != readlen)
135 err(1, "stdout");
136 cnt--;
137 }
138}
139
140static void
83 if (*ep || bytecnt <= 0)
84 errx(1, "illegal byte count -- %s", optarg);
85 break;
86 case 'n':
87 linecnt = strtol(optarg, &ep, 10);
88 if (*ep || linecnt <= 0)
89 errx(1, "illegal line count -- %s", optarg);
90 break;

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135 error = fwrite(cp, sizeof(char), readlen, stdout);
136 if (error != readlen)
137 err(1, "stdout");
138 cnt--;
139 }
140}
141
142static void
141head_bytes(FILE *fp, size_t cnt)
143head_bytes(FILE *fp, off_t cnt)
142{
143 char buf[4096];
144 size_t readlen;
145
146 while (cnt) {
147 if (cnt < sizeof(buf))
148 readlen = cnt;
149 else

--- 35 unchanged lines hidden --- 		144{
145 char buf[4096];
146 size_t readlen;
147
148 while (cnt) {
149 if (cnt < sizeof(buf))
150 readlen = cnt;
151 else

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