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📄 Makefile(5.67 KB)
📄 Makefile.depend(176 B)
📄 __main.c(1.82 KB)
📄 abort.c(1.42 KB)
📁 amd64
📄 arp.c(7.51 KB)
📄 assert.c(1.71 KB)
📄 bcd.c(1.48 KB)
📄 bootp.c(19.71 KB)
📄 bootp.h(4.58 KB)
📄 bootparam.c(9.78 KB)
📄 bootparam.h(180 B)
📄 bzipfs.c(9.92 KB)
📄 cd9660.c(15.37 KB)
📄 cd9660read.c(9.08 KB)
📄 close.c(3.37 KB)
📄 closeall.c(3 KB)
📄 crc32_libkern.c(58 B)
📄 dev.c(1.92 KB)
📄 dosfs.c(22.02 KB)
📄 dosfs.h(4.68 KB)
📄 environment.c(5.3 KB)
📄 ether.c(4.02 KB)
📄 ext2fs.c(23.7 KB)
📄 fstat.c(2.07 KB)
📁 geli
📄 getopt.c(3.46 KB)
📄 gets.c(2.88 KB)
📄 globals.c(1.11 KB)
📄 gpt.c(10.85 KB)
📄 gpt.h(1.62 KB)
📄 gzipfs.c(8.95 KB)
📄 hexdump.c(2.36 KB)
📁 i386
📄 in_cksum.c(2.94 KB)
📄 inet_ntoa.c(2.35 KB)
📄 ioctl.c(3.19 KB)
📄 iodesc.h(2.26 KB)
📄 ip.c(10.5 KB)
📄 libsa.3(14.32 KB)
📄 lseek.c(4.58 KB)
📁 mips
📄 net.c(6.84 KB)
📄 net.h(4.23 KB)
📄 netif.c(7.26 KB)
📄 netif.h(1.49 KB)
📄 nfs.c(18.2 KB)
📄 nfsv2.h(3.67 KB)
📄 nullfs.c(3.44 KB)
📄 open.c(4.43 KB)
📄 pager.c(3.61 KB)
📄 panic.c(2.26 KB)
📄 pkgfs.c(17.54 KB)
📁 powerpc
📄 printf.c(11.96 KB)
📄 random.c(2.3 KB)
📄 rarp.c(5.42 KB)
📄 read.c(4.45 KB)
📄 readdir.c(1.8 KB)
📄 rpc.c(10.08 KB)
📄 rpc.h(2.61 KB)
📄 rpcv2.h(2.86 KB)
📄 saioctl.h(2.59 KB)
📄 sbrk.c(2.06 KB)
📄 smbios.c(13.81 KB)
📄 smbios.h(1.48 KB)
📄 splitfs.c(7.59 KB)
📄 stand.h(15.61 KB)
📄 stat.c(1.89 KB)
📄 strcasecmp.c(2.36 KB)
📄 strdup.c(2.02 KB)
📄 strerror.c(3.04 KB)
📄 tftp.c(17.16 KB)
📄 tftp.h(1.76 KB)
📄 time.c(1.49 KB)
📄 twiddle.c(2.4 KB)
📄 udp.c(4.62 KB)
📄 ufs.c(19.98 KB)
📄 ufsread.c(8.73 KB)
📄 uuid_from_string.c(3.88 KB)
📄 uuid_to_string.c(3.25 KB)
📄 write.c(3.44 KB)
📁 x86
📄 xlocale_private.h(1.52 KB)
📄 zalloc.c(9.15 KB)
📄 zalloc_defs.h(2.57 KB)
📄 zalloc_malloc.c(5.3 KB)
📄 zalloc_mem.h(1.84 KB)
📄 zalloc_protos.h(1.79 KB)
📁 zfs

Editing: pager.c

/*-
 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
/*
 * Simple paged-output and paged-viewing functions
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include "stand.h"
#include <string.h>

static int	p_maxlines = -1;
static int	p_freelines;

static char *pager_prompt1 = " --more--  <space> page down <enter> line down <q> quit ";
static char *pager_blank   = "                                                        ";

/*
 * 'open' the pager
 */
void
pager_open(void)
{
    int		nlines;
    char	*cp, *lp;
    
    nlines = 24;		/* sensible default */
    if ((cp = getenv("LINES")) != NULL) {
	nlines = strtol(cp, &lp, 0);
    }

p_maxlines = nlines - 1;
    if (p_maxlines < 1)
	p_maxlines = 1;
    p_freelines = p_maxlines;
}

/*
 * 'close' the pager
 */
void
pager_close(void)
{
    p_maxlines = -1;
}

/*
 * Emit lines to the pager; may not return until the user
 * has responded to the prompt.
 *
 * Will return nonzero if the user enters 'q' or 'Q' at the prompt.
 *
 * XXX note that this watches outgoing newlines (and eats them), but
 *     does not handle wrap detection (req. count of columns).
 */

int
pager_output(const char *cp)
{
    int		action;

if (cp == NULL)
	return(0);
    
    for (;;) {
	if (*cp == 0)
	    return(0);
	
	putchar(*cp);			/* always emit character */

if (*(cp++) == '\n') {		/* got a newline? */
	    p_freelines--;
	    if (p_freelines <= 0) {
		printf("%s", pager_prompt1);
		action = 0;
		while (action == 0) {
		    switch(getchar()) {
		    case '\r':
		    case '\n':
			p_freelines = 1;
			action = 1;
			break;
		    case ' ':
			p_freelines = p_maxlines;
			action = 1;
			break;
		    case 'q':
		    case 'Q':
			action = 2;
			break;
		    default:
			break;
		    }
		}
		printf("\r%s\r", pager_blank);
		if (action == 2)
		    return(1);
	    }
	}
    }
}

/*
 * Display from (fd).
 */
int
pager_file(const char *fname)
{
    char	buf[80];
    size_t	hmuch;
    int		fd;
    int		result;
    
    if ((fd = open(fname, O_RDONLY)) == -1) {
	printf("can't open '%s': %s\n", fname, strerror(errno));
	return(-1);
    }

for (;;) {
	hmuch = read(fd, buf, sizeof(buf) - 1);
	if (hmuch == -1) {
	    result = -1;
	    break;
	}
	if (hmuch == 0) {
	    result = 0;
	    break;
	}
	buf[hmuch] = 0;
	if (pager_output(buf)) {
	    result = 1;
	    break;
	}
    }
    close(fd);
    return(result);
}

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Editing: pager.c

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