2 * CDE - Common Desktop Environment
4 * Copyright (c) 1993-2012, The Open Group. All rights reserved.
6 * These libraries and programs are free software; you can
7 * redistribute them and/or modify them under the terms of the GNU
8 * Lesser General Public License as published by the Free Software
9 * Foundation; either version 2 of the License, or (at your option)
12 * These libraries and programs are distributed in the hope that
13 * they will be useful, but WITHOUT ANY WARRANTY; without even the
14 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 * PURPOSE. See the GNU Lesser General Public License for more
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with these librararies and programs; if not, write
20 * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
21 * Floor, Boston, MA 02110-1301 USA
23 /* $XConsortium: head.c /main/3 1995/11/01 19:06:00 rswiston $ */
24 /***************************************************************
26 * AT&T - PROPRIETARY *
28 * THIS IS PROPRIETARY SOURCE CODE LICENSED BY *
31 * Copyright (c) 1995 AT&T Corp. *
32 * All Rights Reserved *
34 * This software is licensed by AT&T Corp. *
35 * under the terms and conditions of the license in *
36 * http://www.research.att.com/orgs/ssr/book/reuse *
38 * This software was created by the *
39 * Software Engineering Research Department *
40 * AT&T Bell Laboratories *
42 * For further information contact *
43 * gsf@research.att.com *
45 ***************************************************************/
47 /* : : generated by proto : : */
49 #if !defined(__PROTO__)
50 #if defined(__STDC__) || defined(__cplusplus) || defined(_proto) || defined(c_plusplus)
51 #if defined(__cplusplus)
52 #define __MANGLE__ "C"
57 #define __PROTO__(x) x
59 #define __PARAM__(n,o) n
60 #if !defined(__STDC__) && !defined(__cplusplus)
61 #if !defined(c_plusplus)
72 #define __PROTO__(x) ()
73 #define __OTORP__(x) x
74 #define __PARAM__(n,o) o
82 #if defined(__cplusplus) || defined(c_plusplus)
83 #define __VARARG__ ...
87 #if defined(__STDARG__)
88 #define __VA_START__(p,a) va_start(p,a)
90 #define __VA_START__(p,a) va_start(p)
93 static const char id[] = "\n@(#)head (AT&T Bell Laboratories) 04/01/92\0\n";
98 b_head __PARAM__((int argc, register char *argv[]), (argc, argv)) __OTORP__(int argc; register char *argv[];){
99 static char header_fmt[] = "\n==> %s <==\n";
102 register long number = 10;
103 register off_t skip = 0;
105 register int delim = '\n';
106 char *format = header_fmt+1;
110 while (n = optget(argv, "n#[lines]c#[chars]s#[skip] [file ...]")) switch (n)
116 if((number = opt_info.num) <= 0)
117 error(2, "%c: %d: option requires positive number", n, number);
123 error(2, opt_info.arg);
126 error(ERROR_usage(2), opt_info.arg);
129 argv += opt_info.index;
130 argc -= opt_info.index;
131 if(error_info.errors)
132 error(ERROR_usage(2),optusage(NiL));
137 if(!cp || streq(cp,"-"))
139 else if(!(fp = sfopen(NiL,cp,"r")))
141 error(ERROR_system(0),"%s: cannot open",cp);
142 error_info.errors = 1;
146 sfprintf(sfstdout,format,cp);
149 sfmove(fp,NiL,skip,delim);
150 sfmove(fp, sfstdout,number,delim);
155 return(error_info.errors);