Move sys/boot to stand. Fix all references to new location

Sponsored by:	Netflix

1 files changed, 161 insertions, 0 deletions

diff --git a/stand/libsa/pager.c b/stand/libsa/pager.c
new file mode 100644
index 000000000000..a966b0bd7992
--- /dev/null
+++ b/stand/libsa/pager.c
@@ -0,0 +1,161 @@
+/*-
+ * 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);
+}