xref: /illumos-gate/usr/src/cmd/format/io.c (revision 4e5ef1cee66fbfbbd2b3e56b81e2bb5700f4a59e)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 * Copyright 2015 Nexenta Systems, Inc. All rights reserved.
 */

/*
 * This file contains I/O related functions.
 */
#include "global.h"

#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <ctype.h>
#include <stdarg.h>
#include <sys/tty.h>
#include <sys/termio.h>
#include <sys/termios.h>
#include <sys/efi_partition.h>

#include "startup.h"
#include "misc.h"
#include "menu_partition.h"
#include "param.h"
#include "menu.h"


extern int	data_lineno;
extern char	*space2str();

/*
 * This variable is used to determine whether a token is present in the pipe
 * already.
 */
static	char	token_present = 0;

/*
 * This variable always gives us access to the most recent token type
 */
int	last_token_type = 0;

static int	sup_get_token(char *);
static void	pushchar(int c);
static int	checkeof(void);
static void	flushline(void);
static int	strcnt(char *s1, char *s2);
static int	getbn(char *str, diskaddr_t *iptr);
static void	print_input_choices(int type, u_ioparam_t *param);
static int	slist_widest_str(slist_t *slist);
static void	ljust_print(char *str, int width);
static int	sup_inputchar(void);
static void	sup_pushchar(int c);
static int	geti64(char *str, uint64_t *iptr, uint64_t *wild);

/*
 * This routine pushes the given character back onto the input stream.
 */
static void
pushchar(int c)
{
	(void) ungetc(c, stdin);
}

/*
 * This routine checks the input stream for an eof condition.
 */
static int
checkeof(void)
{
	return (feof(stdin));
}

/*
 * This routine gets the next token off the input stream.  A token is
 * basically any consecutive non-white characters.
 */
char *
gettoken(char *inbuf)
{
	char	*ptr = inbuf;
	int	c, quoted = 0;

retoke:
	/*
	 * Remove any leading white-space.
	 */
	while ((isspace(c = getchar())) && (c != '\n'))
		;
	/*
	 * If we are at the beginning of a line and hit the comment character,
	 * flush the line and start again.
	 */
	if (!token_present && c == COMMENT_CHAR) {
		token_present = 1;
		flushline();
		goto retoke;
	}
	/*
	 * Loop on each character until we hit unquoted white-space.
	 */
	while (!isspace(c) || quoted && (c != '\n')) {
		/*
		 * If we hit eof, get out.
		 */
		if (checkeof())
			return (NULL);
		/*
		 * If we hit a double quote, change the state of quotedness.
		 */
		if (c == '"')
			quoted = !quoted;
		/*
		 * If there's room in the buffer, add the character to the end.
		 */
		else if (ptr - inbuf < TOKEN_SIZE)
			*ptr++ = (char)c;
		/*
		 * Get the next character.
		 */
		c = getchar();
	}
	/*
	 * Null terminate the token.
	 */
	*ptr = '\0';
	/*
	 * Peel off white-space still in the pipe.
	 */
	while (isspace(c) && (c != '\n'))
		c = getchar();
	/*
	 * If we hit another token, push it back and set state.
	 */
	if (c != '\n') {
		pushchar(c);
		token_present = 1;
	} else
		token_present = 0;
	/*
	 * Return the token.
	 */
	return (inbuf);
}

/*
 * This routine removes the leading and trailing spaces from a token.
 */
void
clean_token(char *cleantoken, char *token)
{
	char	*ptr;

	/*
	 * Strip off leading white-space.
	 */
	for (ptr = token; isspace(*ptr); ptr++)
		;
	/*
	 * Copy it into the clean buffer.
	 */
	(void) strcpy(cleantoken, ptr);
	/*
	 * Strip off trailing white-space.
	 */
	for (ptr = cleantoken + strlen(cleantoken) - 1;
	    isspace(*ptr) && (ptr >= cleantoken); ptr--) {
		*ptr = '\0';
	}
}

/*
 * This routine checks if a token is already present on the input line
 */
int
istokenpresent()
{
	return (token_present);
}

/*
 * This routine flushes the rest of an input line if there is known
 * to be data in it.  The flush has to be qualified because the newline
 * may have already been swallowed by the last gettoken.
 */
static void
flushline()
{
	if (token_present) {
		/*
		 * Flush the pipe to eol or eof.
		 */
		while ((getchar() != '\n') && !checkeof())
			;
		/*
		 * Mark the pipe empty.
		 */
		token_present = 0;
	}
}

/*
 * This routine returns the number of characters that are identical
 * between s1 and s2, stopping as soon as a mismatch is found.
 */
static int
strcnt(char *s1, char *s2)
{
	int	i = 0;

	while ((*s1 != '\0') && (*s1++ == *s2++))
		i++;
	return (i);
}

/*
 * This routine converts the given token into an integer.  The token
 * must convert cleanly into an integer with no unknown characters.
 * If the token is the wildcard string, and the wildcard parameter
 * is present, the wildcard value will be returned.
 */
int
geti(char *str, int *iptr, int *wild)
{
	char	*str2;

	/*
	 * If there's a wildcard value and the string is wild, return the
	 * wildcard value.
	 */
	if (wild != NULL && strcmp(str, WILD_STRING) == 0)
		*iptr = *wild;
	else {
		/*
		 * Conver the string to an integer.
		 */
		*iptr = (int)strtol(str, &str2, 0);
		/*
		 * If any characters didn't convert, it's an error.
		 */
		if (*str2 != '\0') {
			err_print("`%s' is not an integer.\n", str);
			return (-1);
		}
	}
	return (0);
}

/*
 * This routine converts the given token into a long long.  The token
 * must convert cleanly into a 64-bit integer with no unknown characters.
 * If the token is the wildcard string, and the wildcard parameter
 * is present, the wildcard value will be returned.
 */
static int
geti64(char *str, uint64_t *iptr, uint64_t *wild)
{
	char	*str2;

	/*
	 * If there's a wildcard value and the string is wild, return the
	 * wildcard value.
	 */
	if ((wild != NULL) && (strcmp(str, WILD_STRING)) == 0) {
		*iptr = *wild;
	} else {
		/*
		 * Conver the string to an integer.
		 */
		*iptr = (uint64_t)strtoll(str, &str2, 0);
		/*
		 * If any characters didn't convert, it's an error.
		 */
		if (*str2 != '\0') {
			err_print("`%s' is not an integer.\n", str);
			return (-1);
		}
	}
	return (0);
}

/*
 * This routine converts the given string into a block number on the
 * current disk.  The format of a block number is either a self-based
 * number, or a series of self-based numbers separated by slashes.
 * Any number preceeding the first slash is considered a cylinder value.
 * Any number succeeding the first slash but preceeding the second is
 * considered a head value.  Any number succeeding the second slash is
 * considered a sector value.  Any of these numbers can be wildcarded
 * to the highest possible legal value.
 */
static int
getbn(char *str, diskaddr_t *iptr)
{
	char	*cptr, *hptr, *sptr;
	int	cyl, head, sect;
	int	wild;
	diskaddr_t	wild64;
	TOKEN	buf;

	/*
	 * Set cylinder pointer to beginning of string.
	 */
	cptr = str;
	/*
	 * Look for the first slash.
	 */
	while ((*str != '\0') && (*str != '/'))
		str++;
	/*
	 * If there wasn't one, convert string to an integer and return it.
	 */
	if (*str == '\0') {
		wild64 = physsects() - 1;
		if (geti64(cptr, iptr, &wild64))
			return (-1);
		return (0);
	}
	/*
	 * Null out the slash and set head pointer just beyond it.
	 */
	*str++ = '\0';
	hptr = str;
	/*
	 * Look for the second slash.
	 */
	while ((*str != '\0') && (*str != '/'))
		str++;
	/*
	 * If there wasn't one, sector pointer points to a .
	 */
	if (*str == '\0')
		sptr = str;
	/*
	 * If there was, null it out and set sector point just beyond it.
	 */
	else {
		*str++ = '\0';
		sptr = str;
	}
	/*
	 * Convert the cylinder part to an integer and store it.
	 */
	clean_token(buf, cptr);
	wild = ncyl + acyl - 1;
	if (geti(buf, &cyl, &wild))
		return (-1);
	if ((cyl < 0) || (cyl >= (ncyl + acyl))) {
		err_print("`%d' is out of range.\n", cyl);
		return (-1);
	}
	/*
	 * Convert the head part to an integer and store it.
	 */
	clean_token(buf, hptr);
	wild = nhead - 1;
	if (geti(buf, &head, &wild))
		return (-1);
	if ((head < 0) || (head >= nhead)) {
		err_print("`%d' is out of range.\n", head);
		return (-1);
	}
	/*
	 * Convert the sector part to an integer and store it.
	 */
	clean_token(buf, sptr);
	wild = sectors(head) - 1;
	if (geti(buf, &sect, &wild))
		return (-1);
	if ((sect < 0) || (sect >= sectors(head))) {
		err_print("`%d' is out of range.\n", sect);
		return (-1);
	}
	/*
	 * Combine the pieces into a block number and return it.
	 */
	*iptr = chs2bn(cyl, head, sect);
	return (0);
}

/*
 * This routine is the basis for all input into the program.  It
 * understands the semantics of a set of input types, and provides
 * consistent error messages for all input.  It allows for default
 * values and prompt strings.
 */
uint64_t
input(int type, char *promptstr, int delim, u_ioparam_t *param, int *deflt,
    int cmdflag)
{
	int		interactive, help, i, length, index, tied;
	blkaddr_t	bn;
	diskaddr_t	bn64;
	char		**str, **strings;
	TOKEN		token, cleantoken;
	TOKEN		token2, cleantoken2;
	char		*arg;
	struct		bounds *bounds;
	char		*s;
	int		value;
	int		cyls, cylno;
	uint64_t	blokno;
	float		nmegs;
	float		ngigs;
	char		shell_argv[MAXPATHLEN];
	part_deflt_t	*part_deflt;
	efi_deflt_t	*efi_deflt;

	/*
	 * Optional integer input has been added as a hack.
	 * Function result is 1 if user typed anything.
	 * Whatever they typed is returned in *deflt.
	 * This permits us to distinguish between "no value",
	 * and actually entering in some value, for instance.
	 */
	if (type == FIO_OPINT) {
		assert(deflt != NULL);
	}
reprompt:
	help = interactive = 0;
	/*
	 * If we are inputting a command, flush any current input in the pipe.
	 */
	if (cmdflag == CMD_INPUT)
		flushline();
	/*
	 * Note whether the token is already present.
	 */
	if (!token_present)
		interactive = 1;
	/*
	 * Print the prompt.
	 */
	fmt_print(promptstr);
	/*
	 * If there is a default value, print it in a format appropriate
	 * for the input type.
	 */
	if (deflt != NULL) {
		switch (type) {
		case FIO_BN:
#if !defined(lint)	/* caller has aligned the pointer specifying FIO_BN */
			fmt_print("[%llu, ", *(diskaddr_t *)deflt);
			pr_dblock(fmt_print, *(diskaddr_t *)deflt);
			fmt_print("]");
#endif
			break;
		case FIO_INT:
			fmt_print("[%d]", *deflt);
			break;
		case FIO_INT64:
#if defined(lint)
			/* caller is longlong aligned specifying FIO_INT64 */
			efi_deflt = NULL;
#else
			efi_deflt = (efi_deflt_t *)deflt;
#endif
			fmt_print("[%llu]", efi_deflt->start_sector);
			break;
		case FIO_CSTR:
		case FIO_MSTR:
			strings = (char **)param->io_charlist;
			for (i = 0, str = strings; i < *deflt; i++, str++)
				;
			fmt_print("[%s]", *str);
			break;
		case FIO_OSTR:
			fmt_print("[\"%s\"]", (char *)deflt);
			break;
		case FIO_SLIST:
			/*
			 * Search for a string matching the default
			 * value.  If found, use it.  Otherwise
			 * assume the default value is actually
			 * an illegal choice, and default to
			 * the first item in the list.
			 */
			s = find_string(param->io_slist, *deflt);
			if (s == (char *)NULL) {
				s = (param->io_slist)->str;
			}
			fmt_print("[%s]", s);
			break;
		case FIO_CYL:
			/*
			 * Old-style partition size input, used to
			 * modify complete partition tables
			 */
			blokno = *(blkaddr32_t *)deflt;
			fmt_print("[%llub, %uc, %1.2fmb, %1.2fgb]", blokno,
			    bn2c(blokno), bn2mb(blokno), bn2gb(blokno));
			break;
		case FIO_ECYL:
			/*
			 * set up pointer to partition defaults
			 * structure
			 */
			part_deflt = (part_deflt_t *)deflt;

			/*
			 * Build print format specifier.  We use the
			 * starting cylinder number which was entered
			 * before this call to input(), in case the
			 * user has changed it from the value in the
			 * cur_parts->pinfo_map[].dkl_cylno
			 * field for the current parition
			 */

			/*
			 * Determine the proper default end cylinder:
			 * Start Cyl	Default Size	End Cylinder
			 *	0		0	0
			 *	>0		0	Start Cyl
			 *	0		>0	Default Size
			 *				(Cyls) - 1
			 *	>0		>0	(Start +
			 *				Default Size
			 *				(Cyls)) -1
			 */

			if (part_deflt->deflt_size == 0) {
				cylno = part_deflt->start_cyl;
			} else if (part_deflt->start_cyl == 0) {
				cylno = bn2c(part_deflt->deflt_size) - 1;
			} else {
				cylno = (bn2c(part_deflt->deflt_size) +
				    part_deflt->start_cyl) - 1;
			}

			fmt_print("[%ub, %uc, %de, %1.2fmb, %1.2fgb]",
			    part_deflt->deflt_size,
			    bn2c(part_deflt->deflt_size),
			    cylno,
			    bn2mb(part_deflt->deflt_size),
			    bn2gb(part_deflt->deflt_size));

			break;
		case FIO_EFI:
#if defined(lint)
			/* caller is longlong aligned when specifying FIO_EFI */
			efi_deflt = NULL;
#else
			efi_deflt = (efi_deflt_t *)deflt;
#endif

			fmt_print("[%llub, %llue, %llumb, %llugb, %llutb]",
			    efi_deflt->end_sector,
			    efi_deflt->start_sector + efi_deflt->end_sector - 1,
			    (efi_deflt->end_sector * cur_blksz) /
			    (1024 * 1024),
			    (efi_deflt->end_sector * cur_blksz) /
			    (1024 * 1024 * 1024),
			    (efi_deflt->end_sector * cur_blksz) /
			    ((uint64_t)1024 * 1024 * 1024 * 1024));
			break;
		case FIO_OPINT:
			/* no default value for optional input type */
			fmt_print("[default]");
			break;
		default:
			err_print("Error: unknown input type.\n");
			fullabort();
		}
	}
	/*
	 * Print the delimiter character.
	 */
	fmt_print("%c ", delim);
	/*
	 * Get the token.  If we hit eof, exit the program gracefully.
	 */
	if (gettoken(token) == NULL)
		fullabort();

	/*
	 * check if the user has issued (!) , escape to shell
	 */
	if ((cmdflag == CMD_INPUT) && (token[0] == '!')) {

	    /* get the list of arguments to shell command */
		(void) memset(shell_argv, 0, sizeof (shell_argv));

		/* initialize to the first token... */
		arg = &token[1];

		/*
		 * ... and then collect all tokens until the end of
		 * the line as arguments
		 */
		do {
			/* skip empty tokens. */
			if (*arg == '\0')
				continue;
			/*
			 * If either of the following two strlcat()
			 * operations overflows, report an error and
			 * exit gracefully.
			 */
			if ((strlcat(shell_argv, arg, sizeof (shell_argv)) >=
			    sizeof (shell_argv)) ||
			    (strlcat(shell_argv, " ", sizeof (shell_argv)) >=
			    sizeof (shell_argv))) {
				err_print("Error: Command line too long.\n");
				fullabort();
			}
		} while (token_present && (arg = gettoken(token)) != NULL);

		/* execute the shell command */
		(void) execute_shell(shell_argv, sizeof (shell_argv));
		redisplay_menu_list((char **)param->io_charlist);
		if (interactive) {
			goto reprompt;
		}
	}

	/*
	 * Certain commands accept up to two tokens
	 * Unfortunately, this is kind of a hack.
	 */
	token2[0] = 0;
	cleantoken2[0] = 0;
	if (type == FIO_CYL || type == FIO_ECYL) {
		if (token_present) {
			if (gettoken(token2) == NULL)
				fullabort();
			clean_token(cleantoken2, token2);
		}
	}
	/*
	 * Echo the token back to the user if it was in the pipe or we
	 * are running out of a command file.
	 */
	if (!interactive || option_f) {
		if (token2[0] == 0) {
			fmt_print("%s\n", token);
		} else {
			fmt_print("%s %s\n", token, token2);
		}
	}
	/*
	 * If we are logging, echo the token to the log file.  The else
	 * is necessary here because the above printf will also put the
	 * token in the log file.
	 */
	else if (log_file) {
		log_print("%s %s\n", token, token2);
	}
	/*
	 * If the token was not in the pipe and it wasn't a command, flush
	 * the rest of the line to keep things in sync.
	 */
	if (interactive && cmdflag != CMD_INPUT)
		flushline();
	/*
	 * Scrub off the white-space.
	 */
	clean_token(cleantoken, token);
	/*
	 * If the input was a blank line and we weren't prompting
	 * specifically for a blank line...
	 */
	if ((strcmp(cleantoken, "") == 0) && (type != FIO_BLNK)) {
		/*
		 * If there's a default, return it.
		 */
		if (deflt != NULL) {
			if (type == FIO_OSTR) {
				/*
				 * Duplicate and return the default string
				 */
				return ((int)alloc_string((char *)deflt));
			} else if (type == FIO_SLIST) {
				/*
				 * If we can find a match for the default
				 * value in the list, return the default
				 * value.  If there's no match for the
				 * default value, it's an illegal
				 * choice.  Return the first value in
				 * the list.
				 */
				s = find_string(param->io_slist, *deflt);
				if ((cur_label == L_TYPE_EFI) &&
				    (s == (char *)NULL)) {
					return (*deflt);
				}
				if (s == (char *)NULL) {
					return ((param->io_slist)->value);
				} else {
					return (*deflt);
				}
			} else if (type == FIO_OPINT) {
				/*
				 * The user didn't enter anything
				 */
				return (0);
			} else if (type == FIO_ECYL) {
				return (part_deflt->deflt_size);
			} else if (type == FIO_INT64) {
				return (efi_deflt->start_sector);
			} else if (type == FIO_EFI) {
				return (efi_deflt->end_sector);
			} else {
				return (*deflt);
			}
		}
		/*
		 * If the blank was not in the pipe, just reprompt.
		 */
		if (interactive) {
			goto reprompt;
		}
		/*
		 * If the blank was in the pipe, it's an error.
		 */
		err_print("No default for this entry.\n");
		cmdabort(SIGINT);
	}
	/*
	 * If token is a '?' or a 'h', it is a request for help.
	 */
	if ((strcmp(cleantoken, "?") == 0) ||
	    (strcmp(cleantoken, "h") == 0) ||
	    (strcmp(cleantoken, "help") == 0)) {
		help = 1;
	}
	/*
	 * Switch on the type of input expected.
	 */
	switch (type) {
	/*
	 * Expecting a disk block number.
	 */
	case FIO_BN:
		/*
		 * Parameter is the bounds of legal block numbers.
		 */
		bounds = (struct bounds *)&param->io_bounds;
		/*
		 * Print help message if required.
		 */
		if (help) {
			fmt_print("Expecting a block number from %llu (",
			    bounds->lower);
			pr_dblock(fmt_print, bounds->lower);
			fmt_print(") to %llu (", bounds->upper);
			pr_dblock(fmt_print, bounds->upper);
			fmt_print(")\n");
			break;
		}
		/*
		 * Convert token to a disk block number.
		 */
		if (cur_label == L_TYPE_EFI) {
			if (geti64(cleantoken, (uint64_t *)&bn64,
			    (uint64_t *)NULL))
				break;
		} else {
			if (getbn(cleantoken, &bn64))
				break;
		}
		/*
		 * Check to be sure it is within the legal bounds.
		 */
		if ((bn64 < bounds->lower) || (bn64 > bounds->upper)) {
			err_print("`");
			pr_dblock(err_print, bn64);
			err_print("' is out of range.\n");
			break;
		}
		/*
		 * It's ok, return it.
		 */
		return (bn64);
	/*
	 * Expecting an integer.
	 */
	case FIO_INT:
		/*
		 * Parameter is the bounds of legal integers.
		 */
		bounds = (struct bounds *)&param->io_bounds;
		/*
		 * Print help message if required.
		 */
		if (help) {
			fmt_print("Expecting an integer from %llu",
			    bounds->lower);
			fmt_print(" to %llu\n", bounds->upper);
			break;
		}
		/*
		 * Convert the token into an integer.
		 */
		if (geti(cleantoken, (int *)&bn, (int *)NULL))
			break;
		/*
		 * Check to be sure it is within the legal bounds.
		 */
		if ((bn < bounds->lower) || (bn > bounds->upper)) {
			err_print("`%lu' is out of range.\n", bn);
			break;
		}
		/*
		 * If it's ok, return it.
		 */
		return (bn);
	case FIO_INT64:
		/*
		 * Parameter is the bounds of legal integers.
		 */
		bounds = (struct bounds *)&param->io_bounds;
		/*
		 * Print help message if required.
		 */
		if (help) {
			fmt_print("Expecting an integer from %llu",
			    bounds->lower);
			fmt_print(" to %llu\n", bounds->upper);
			break;
		}
		/*
		 * Convert the token into an integer.
		 */
		if (geti64(cleantoken, (uint64_t *)&bn64, (uint64_t *)NULL)) {
			break;
		}
		/*
		 * Check to be sure it is within the legal bounds.
		 */
		if ((bn64 < bounds->lower) || (bn64 > bounds->upper)) {
			err_print("`%llu' is out of range.\n", bn64);
			break;
		}
		/*
		 * If it's ok, return it.
		 */
		return (bn64);
	/*
	 * Expecting an integer, or no input.
	 */
	case FIO_OPINT:
		/*
		 * Parameter is the bounds of legal integers.
		 */
		bounds = (struct bounds *)&param->io_bounds;
		/*
		 * Print help message if required.
		 */
		if (help) {
			fmt_print("Expecting an integer from %llu",
			    bounds->lower);
			fmt_print(" to %llu, or no input\n", bounds->upper);
			break;
		}
		/*
		 * Convert the token into an integer.
		 */
		if (geti(cleantoken, (int *)&bn, (int *)NULL))
			break;
		/*
		 * Check to be sure it is within the legal bounds.
		 */
		if ((bn < bounds->lower) || (bn > bounds->upper)) {
			err_print("`%lu' is out of range.\n", bn);
			break;
		}
		/*
		 * For optional case, return 1 indicating that
		 * the user actually did enter something.
		 */
		if (!deflt)
			*deflt = bn;
		return (1);
	/*
	 * Expecting a closed string.  This means that the input
	 * string must exactly match one of the strings passed in
	 * as the parameter.
	 */
	case FIO_CSTR:
		/*
		 * The parameter is a null terminated array of character
		 * pointers, each one pointing to a legal input string.
		 */
		strings = (char **)param->io_charlist;
		/*
		 * Walk through the legal strings, seeing if any of them
		 * match the token.  If a match is made, return the index
		 * of the string that was matched.
		 */
		for (str = strings; *str != NULL; str++)
			if (strcmp(cleantoken, *str) == 0)
				return (str - strings);
		/*
		 * Print help message if required.
		 */
		if (help) {
			print_input_choices(type, param);
		} else {
			err_print("`%s' is not expected.\n", cleantoken);
		}
		break;
	/*
	 * Expecting a matched string.  This means that the input
	 * string must either match one of the strings passed in,
	 * or be a unique abbreviation of one of them.
	 */
	case FIO_MSTR:
		/*
		 * The parameter is a null terminated array of character
		 * pointers, each one pointing to a legal input string.
		 */
		strings = (char **)param->io_charlist;
		length = index = tied = 0;
		/*
		 * Loop through the legal input strings.
		 */
		for (str = strings; *str != NULL; str++) {
			/*
			 * See how many characters of the token match
			 * this legal string.
			 */
			i = strcnt(cleantoken, *str);
			/*
			 * If it's not the whole token, then it's not a match.
			 */
			if ((uint_t)i < strlen(cleantoken))
				continue;
			/*
			 * If it ties with another input, remember that.
			 */
			if (i == length)
				tied = 1;
			/*
			 * If it matches the most so far, record that.
			 */
			if (i > length) {
				index = str - strings;
				tied = 0;
				length = i;
			}
		}
		/*
		 * Print help message if required.
		 */
		if (length == 0) {
			if (help) {
				print_input_choices(type, param);
			} else {
				err_print("`%s' is not expected.\n",
				    cleantoken);
			}
			break;
		}
		/*
		 * If the abbreviation was non-unique, it's an error.
		 */
		if (tied) {
			err_print("`%s' is ambiguous.\n", cleantoken);
			break;
		}
		/*
		 * We matched one.  Return the index of the string we matched.
		 */
		return (index);
	/*
	 * Expecting an open string.  This means that any string is legal.
	 */
	case FIO_OSTR:
		/*
		 * Print a help message if required.
		 */
		if (help) {
			fmt_print("Expecting a string\n");
			break;
		}
		/*
		 * alloc a copy of the string and return it
		 */
		return ((int)alloc_string(token));

	/*
	 * Expecting a blank line.
	 */
	case FIO_BLNK:
		/*
		 * We are always in non-echo mode when we are inputting
		 * this type.  We echo the newline as a carriage return
		 * only so the prompt string will be covered over.
		 */
		nolog_print("\015");
		/*
		 * If we are logging, send a newline to the log file.
		 */
		if (log_file)
			log_print("\n");
		/*
		 * There is no value returned for this type.
		 */
		return (0);

	/*
	 * Expecting one of the entries in a string list.
	 * Accept unique abbreviations.
	 * Return the value associated with the matched string.
	 */
	case FIO_SLIST:
		i = find_value((slist_t *)param->io_slist, cleantoken, &value);
		if (i == 1) {
			return (value);
		} else {
			/*
			 * Print help message if required.
			 */

			if (help) {
				print_input_choices(type, param);
			} else {
				if (i == 0)
					err_print("`%s' not expected.\n",
					    cleantoken);
				else
					err_print("`%s' is ambiguous.\n",
					    cleantoken);
			}
		}
		break;

	/*
	 * Cylinder size input when modifying a complete partition map
	 */
	case FIO_CYL:
		/*
		 * Parameter is the bounds of legal block numbers.
		 */
		bounds = (struct bounds *)&param->io_bounds;
		assert(bounds->lower == 0);
		/*
		 * Print help message if required.
		 */
		if (help) {
			fmt_print("Expecting up to %llu blocks,",
			    bounds->upper);
			fmt_print(" %u cylinders, ", bn2c(bounds->upper));
			fmt_print(" %1.2f megabytes, ", bn2mb(bounds->upper));
			fmt_print("or %1.2f gigabytes\n", bn2gb(bounds->upper));
			break;
		}
		/*
		 * Parse the first token: try to find 'b', 'c' or 'm'
		 */
		s = cleantoken;
		while (*s && (isdigit(*s) || (*s == '.') || (*s == '$'))) {
			s++;
		}
		/*
		 * If we found a conversion specifier, second token is unused
		 * Otherwise, the second token should supply it.
		 */
		if (*s != 0) {
			value = *s;
			*s = 0;
		} else {
			value = cleantoken2[0];
		}
		/*
		 * If the token is the wild card, simply supply the max
		 * This order allows the user to specify the maximum in
		 * either blocks/cyls/megabytes - a convenient fiction.
		 */
		if (strcmp(cleantoken, WILD_STRING) == 0) {
			return (bounds->upper);
		}
		/*
		 * Allow the user to specify zero with no units,
		 * by just defaulting to cylinders.
		 */
		if (strcmp(cleantoken, "0") == 0) {
			value = 'c';
		}
		/*
		 * If there's a decimal point, but no unit specification,
		 * let's assume megabytes.
		 */
		if ((value == 0) && (strchr(cleantoken, '.') != NULL)) {
			value = 'm';
		}
		/*
		 * Handle each unit type we support
		 */
		switch (value) {
		case 'b':
			/*
			 * Convert token to a disk block number.
			 */
			if (geti64(cleantoken, &bn64, &bounds->upper))
				break;
			/*
			 * Check to be sure it is within the legal bounds.
			 */
			if ((bn64 < bounds->lower) || (bn64 > bounds->upper)) {
				err_print(
				    "`%llub' is out of the range %llu "
				    "to %llu\n",
				    bn64, bounds->lower, bounds->upper);
				break;
			}
			/*
			 * Verify the block lies on a cylinder boundary
			 */
			if ((bn64 % spc()) != 0) {
				err_print(
				    "partition size must be a multiple of "
				    "%u blocks to lie on a cylinder boundary\n",
				    spc());
				err_print(
				    "%llu blocks is approximately %u cylinders,"
				    " %1.2f megabytes or %1.2f gigabytes\n",
				    bn64, bn2c(bn64), bn2mb(bn64), bn2gb(bn64));
				break;
			}
			return (bn64);
		case 'c':
			/*
			 * Convert token from a number of cylinders to
			 * a number of blocks.
			 */
			i = bn2c(bounds->upper);
			if (geti(cleantoken, &cyls, &i))
				break;
			/*
			 * Check the bounds - cyls is number of cylinders
			 */
			if (cyls > (bounds->upper/spc())) {
				err_print("`%dc' is out of range\n", cyls);
				break;
			}
			/*
			 * Convert cylinders to blocks and return
			 */
			return (cyls * spc());
		case 'm':
			/*
			 * Convert token from megabytes to a block number.
			 */
			if (sscanf(cleantoken, "%f2", &nmegs) != 1) {
				err_print("`%s' is not recognized\n",
				    cleantoken);
				break;
			}
			/*
			 * Check the bounds
			 */
			if (nmegs > bn2mb(bounds->upper)) {
				err_print("`%1.2fmb' is out of range\n", nmegs);
				break;
			}
			/*
			 * Convert to blocks
			 */
			bn64 = mb2bn(nmegs);
			/*
			 * Round value up to nearest cylinder
			 */
			i = spc();
			bn64 = ((bn64 + (i-1)) / i) * i;
			return (bn64);
		case 'g':
			/*
			 * Convert token from gigabytes to a block number.
			 */
			if (sscanf(cleantoken, "%f2", &ngigs) != 1) {
				err_print("`%s' is not recognized\n",
				    cleantoken);
				break;
			}
			/*
			 * Check the bounds
			 */
			if (ngigs > bn2gb(bounds->upper)) {
				err_print("`%1.2fgb' is out of range\n", ngigs);
				break;
			}
			/*
			 * Convert to blocks
			 */
			bn64 = gb2bn(ngigs);
			/*
			 * Round value up to nearest cylinder
			 */
			i = spc();
			bn64 = ((bn64 + (i-1)) / i) * i;
			return (bn64);
		default:
			err_print(
"Please specify units in either b(blocks), c(cylinders), m(megabytes) \
or g(gigabytes)\n");
			break;
		}
		break;

	case FIO_ECYL:
		/*
		 * Parameter is the bounds of legal block numbers.
		 */
		bounds = (struct bounds *)&param->io_bounds;
		assert(bounds->lower == 0);

		/*
		 * Print help message if required.
		 */
		if (help) {
			fmt_print("Expecting up to %llu blocks,",
			    bounds->upper);
			fmt_print(" %u cylinders, ",
			    bn2c(bounds->upper));
			fmt_print(" %u end cylinder, ",
			    (uint_t)(bounds->upper / spc()));
			fmt_print(" %1.2f megabytes, ",
			    bn2mb(bounds->upper));
			fmt_print("or %1.2f gigabytes\n",
			    bn2gb(bounds->upper));
			break;
		}

		/*
		 * Parse the first token: try to find 'b', 'c', 'e'
		 * or 'm'
		 */
		s = cleantoken;
		while (*s && (isdigit(*s) || (*s == '.') || (*s == '$'))) {
			s++;
		}

		/*
		 * If we found a conversion specifier, second token is
		 * unused Otherwise, the second token should supply it.
		 */
		if (*s != 0) {
			value = *s;
			*s = 0;
		} else {
			value = cleantoken2[0];
		}

		/*
		 * If the token is the wild card, simply supply the max
		 * This order allows the user to specify the maximum in
		 * either blocks/cyls/megabytes - a convenient fiction.
		 */
		if (strcmp(cleantoken, WILD_STRING) == 0) {
			return (bounds->upper);
		}

		/*
		 * Allow the user to specify zero with no units,
		 * by just defaulting to cylinders.
		 */

		if (value != 'e' && strcmp(cleantoken, "0") == 0) {
			value = 'c';
		}


		/*
		 * If there's a decimal point, but no unit
		 * specification, let's assume megabytes.
		 */
		if ((value == 0) && (strchr(cleantoken, '.') != NULL)) {
			value = 'm';
		}

		/*
		 * Handle each unit type we support
		 */
		switch (value) {
		case 'b':
			/*
			 * Convert token to a disk block number.
			 */
			if (geti64(cleantoken, &bn64, &bounds->upper))
				break;
			/*
			 * Check to be sure it is within the
			 * legal bounds.
			 */
			if ((bn64 < bounds->lower) || (bn64 > bounds->upper)) {
				err_print(
"`%llub' is out of the range %llu to %llu\n",
				    bn64, bounds->lower, bounds->upper);
				break;
			}

			/*
			 * Verify the block lies on a cylinder
			 * boundary
			 */
			if ((bn64 % spc()) != 0) {
				err_print(
				    "partition size must be a multiple of %u "
				    "blocks to lie on a cylinder boundary\n",
				    spc());
				err_print(
				    "%llu blocks is approximately %u cylinders,"
				    " %1.2f megabytes or %1.2f gigabytes\n",
				    bn64, bn2c(bn64), bn2mb(bn64), bn2gb(bn64));
				break;
			}

			return (bn64);

		case 'e':
			/*
			 * Token is ending cylinder
			 */

			/* convert token to integer */
			if (geti(cleantoken, &cylno, (int *)NULL)) {
				break;
			}

			/*
			 * check that input cylno isn't before the current
			 * starting cylinder number.  Note that we are NOT
			 * using the starting cylinder from
			 * cur_parts->pinfo_map[].dkl_cylno!
			 */
			if (cylno < part_deflt->start_cyl) {
				err_print(
"End cylinder must fall on or after start cylinder %u\n",
				    part_deflt->start_cyl);
				break;
			}

			/*
			 * calculate cylinder number of upper boundary, and
			 * verify that our input is within range
			 */
			i = (bn2c(bounds->upper) + part_deflt->start_cyl - 1);

			if (cylno > i) {
				err_print(
"End cylinder %d is beyond max cylinder %d\n",
				    cylno, i);
				break;
			}

			/*
			 * calculate number of cylinders based on input
			 */
			cyls = ((cylno - part_deflt->start_cyl) + 1);

			return (cyls * spc());

		case 'c':
			/*
			 * Convert token from a number of
			 * cylinders to a number of blocks.
			 */
			i = bn2c(bounds->upper);
			if (geti(cleantoken, &cyls, &i))
				break;

			/*
			 * Check the bounds - cyls is number of
			 * cylinders
			 */
			if (cyls > (bounds->upper/spc())) {
				err_print("`%dc' is out of range\n", cyls);
				break;
			}

			/*
			 * Convert cylinders to blocks and
			 * return
			 */
			return (cyls * spc());

		case 'm':
			/*
			 * Convert token from megabytes to a
			 * block number.
			 */
			if (sscanf(cleantoken, "%f2", &nmegs) != 1) {
				err_print("`%s' is not recognized\n",
				    cleantoken);
				break;
			}

			/*
			 * Check the bounds
			 */
			if (nmegs > bn2mb(bounds->upper)) {
				err_print("`%1.2fmb' is out of range\n", nmegs);
				break;
			}

			/*
			 * Convert to blocks
			 */
			bn64 = mb2bn(nmegs);

			/*
			 * Round value up to nearest cylinder
			 */
			i = spc();
			bn64 = ((bn64 + (i-1)) / i) * i;
			return (bn64);

		case 'g':
			/*
			 * Convert token from gigabytes to a
			 * block number.
			 */
			if (sscanf(cleantoken, "%f2", &ngigs) != 1) {
				err_print("`%s' is not recognized\n",
				    cleantoken);
				break;
			}

			/*
			 * Check the bounds
			 */
			if (ngigs > bn2gb(bounds->upper)) {
				err_print("`%1.2fgb' is out of range\n", ngigs);
				break;
			}

			/*
			 * Convert to blocks
			 */
			bn64 = gb2bn(ngigs);

			/*
			 * Round value up to nearest cylinder
			 */
			i = spc();
			bn64 = ((bn64 + (i-1)) / i) * i;
			return (bn64);

		default:
			err_print(
"Please specify units in either b(blocks), c(cylinders), e(end cylinder),\n");
			err_print("m(megabytes) or g(gigabytes)\n");
			break;
		}
		break;
	case FIO_EFI:
		/*
		 * Parameter is the bounds of legal block numbers.
		 */
		bounds = (struct bounds *)&param->io_bounds;

		/*
		 * Print help message if required.
		 */
		if (help) {
			fmt_print("Expecting up to %llu sectors,",
			    cur_parts->etoc->efi_last_u_lba);
			fmt_print("or %llu megabytes,",
			    (cur_parts->etoc->efi_last_u_lba * cur_blksz) /
			    (1024 * 1024));
			fmt_print("or %llu gigabytes\n",
			    (cur_parts->etoc->efi_last_u_lba * cur_blksz) /
			    (1024 * 1024 * 1024));
			fmt_print("or %llu terabytes\n",
			    (cur_parts->etoc->efi_last_u_lba * cur_blksz) /
			    ((uint64_t)1024 * 1024 * 1024 * 1024));
			break;
		}

		/*
		 * Parse the first token: try to find 'b', 'c', 'e'
		 * or 'm'
		 */
		s = cleantoken;
		while (*s && (isdigit(*s) || (*s == '.') || (*s == '$'))) {
			s++;
		}

		/*
		 * If we found a conversion specifier, second token is
		 * unused Otherwise, the second token should supply it.
		 */
		if (*s != 0) {
			value = *s;
			*s = 0;
		} else {
			value = cleantoken2[0];
		}

		/*
		 * If the token is the wild card, simply supply the max
		 * This order allows the user to specify the maximum in
		 * either blocks/cyls/megabytes - a convenient fiction.
		 */
		if (strcmp(cleantoken, WILD_STRING) == 0) {
			uint64_t reserved;

			reserved = efi_reserved_sectors(cur_parts->etoc);
			return (bounds->upper - reserved -
			    efi_deflt->start_sector + 1);
		}

		/*
		 * Allow the user to specify zero with no units,
		 * by just defaulting to sectors.
		 */

		if (value != 'e' && strcmp(cleantoken, "0") == 0) {
			value = 'm';
		}


		/*
		 * If there's a decimal point, but no unit
		 * specification, let's assume megabytes.
		 */
		if ((value == 0) && (strchr(cleantoken, '.') != NULL)) {
			value = 'm';
		}

		/*
		 * Handle each unit type we support
		 */
		switch (value) {
		case 'b':
			/*
			 * Token is number of blocks
			 */
			if (geti64(cleantoken, &blokno, (uint64_t *)NULL)) {
				break;
			}
			if (blokno > bounds->upper) {
				err_print("Number of blocks must be less that "
				    "the total available blocks.\n");
				break;
			}
			return (blokno);

		case 'e':
			/*
			 * Token is ending block number
			 */

			/* convert token to integer */
			if (geti64(cleantoken, &blokno, (uint64_t *)NULL)) {
				break;
			}

			/*
			 * Some sanity check
			 */
			if (blokno < efi_deflt->start_sector) {
				err_print("End Sector must fall on or after "
				    "start sector %llu\n",
				    efi_deflt->start_sector);
				break;
			}

			/*
			 * verify that our input is within range
			 */
			if (blokno > cur_parts->etoc->efi_last_u_lba) {
				err_print("End Sector %llu is beyond max "
				    "Sector %llu\n",
				    blokno, cur_parts->etoc->efi_last_u_lba);
				break;
			}

			/*
			 * calculate number of blocks based on input
			 */

			return (blokno - efi_deflt->start_sector + 1);

		case 'm':
			/*
			 * Convert token from megabytes to a
			 * block number.
			 */
			if (sscanf(cleantoken, "%f2", &nmegs) != 1) {
				err_print("`%s' is not recognized\n",
				    cleantoken);
				break;
			}

			/*
			 * Check the bounds
			 */
			if (nmegs > bn2mb(bounds->upper - bounds->lower)) {
				err_print("`%1.2fmb' is out of range\n", nmegs);
				break;
			}

			return (mb2bn(nmegs));

		case 'g':
			if (sscanf(cleantoken, "%f2", &nmegs) != 1) {
				err_print("`%s' is not recognized\n",
				    cleantoken);
				break;
			}
			if (nmegs > bn2gb(bounds->upper - bounds->lower)) {
				err_print("`%1.2fgb' is out of range\n", nmegs);
				break;
			}

			return (gb2bn(nmegs));

		case 't':
			if (sscanf(cleantoken, "%f2", &nmegs) != 1) {
				err_print("`%s' is not recognized\n",
				    cleantoken);
				break;
			}
			if (nmegs > bn2tb(bounds->upper - bounds->lower)) {
				err_print("`%1.2ftb' is out of range\n", nmegs);
				break;
			}
			return (uint64_t)((float)nmegs * 1024.0 *
			    1024.0 * 1024.0 * 1024.0 / cur_blksz);

		default:
			err_print("Please specify units in either "
			    "b(number of blocks), e(end sector),\n");
			err_print(" g(gigabytes), m(megabytes)");
			err_print(" or t(terabytes)\n");
			break;
		}
		break;

	/*
	 * If we don't recognize the input type, it's bad news.
	 */
	default:
		err_print("Error: unknown input type.\n");
		fullabort();
	}
	/*
	 * If we get here, it's because some error kept us from accepting
	 * the token.  If we are running out of a command file, gracefully
	 * leave the program.  If we are interacting with the user, simply
	 * reprompt.  If the token was in the pipe, abort the current command.
	 */
	if (option_f)
		fullabort();
	else if (interactive)
		goto reprompt;
	else
		cmdabort(SIGINT);
	/*
	 * Never actually reached.
	 */
	return (-1);
}

/*
 * Print input choices
 */
static void
print_input_choices(int type, u_ioparam_t *param)
{
	char		**sp;
	slist_t		*lp;
	int		width;
	int		col;
	int		ncols;

	switch (type) {
	case FIO_CSTR:
		fmt_print("Expecting one of the following:\n");
		goto common;

	case FIO_MSTR:
		fmt_print("Expecting one of the following: ");
		fmt_print("(abbreviations ok):\n");
common:
		for (sp = (char **)param->io_charlist; *sp != NULL; sp++) {
			fmt_print("\t%s\n", *sp);
		}
		break;

	case FIO_SLIST:
		fmt_print("Expecting one of the following: ");
		fmt_print("(abbreviations ok):\n");
		/*
		 * Figure out the width of the widest string
		 */
		width = slist_widest_str((slist_t *)param->io_slist);
		width += 4;
		/*
		 * If the help messages are empty, print the
		 * possible choices in left-justified columns
		 */
		lp = (slist_t *)param->io_slist;
		if (*lp->help == 0) {
			col = 0;
			ncols = 60 / width;
			for (; lp->str != NULL; lp++) {
				if (col == 0)
					fmt_print("\t");
				ljust_print(lp->str,
				    (++col == ncols) ? 0 : width);
				if (col == ncols) {
					col = 0;
					fmt_print("\n");
				}
			}
			if (col != 0)
				fmt_print("\n");
		} else {
			/*
			 * With help messages, print each choice,
			 * and help message, on its own line.
			 */
			for (; lp->str != NULL; lp++) {
				fmt_print("\t");
				ljust_print(lp->str, width);
				fmt_print("- %s\n", lp->help);
			}
		}
		break;

	default:
		err_print("Error: unknown input type.\n");
		fullabort();
	}

	fmt_print("\n");
}


/*
 * Search a string list for a particular string.
 * Use minimum recognition, to accept unique abbreviations
 * Return the number of possible matches found.
 * If only one match was found, return the arbitrary value
 * associated with the matched string in match_value.
 */
int
find_value(slist_t *slist, char *match_str, int *match_value)
{
	int		i;
	int		nmatches;
	int		length;
	int		match_length;

	nmatches = 0;
	length = 0;

	match_length = strlen(match_str);

	for (; slist->str != NULL; slist++) {
		/*
		 * See how many characters of the token match
		 */
		i = strcnt(match_str, slist->str);
		/*
		 * If it's not the whole token, then it's not a match.
		 */
		if (i  < match_length)
			continue;
		/*
		 * If it ties with another input, remember that.
		 */
		if (i == length)
			nmatches++;
		/*
		 * If it matches the most so far, record that.
		 */
		if (i > length) {
			*match_value = slist->value;
			nmatches = 1;
			length = i;
		}
	}

	return (nmatches);
}

/*
 * Search a string list for a particular value.
 * Return the string associated with that value.
 */
char *
find_string(slist_t *slist, int match_value)
{
	for (; slist->str != NULL; slist++) {
		if (slist->value == match_value) {
			return (slist->str);
		}
	}

	return (NULL);
}

/*
 * Return the width of the widest string in an slist
 */
static int
slist_widest_str(slist_t *slist)
{
	int	i;
	int	width;

	width = 0;
	for (; slist->str != NULL; slist++) {
		if ((i = strlen(slist->str)) > width)
			width = i;
	}

	return (width);
}

/*
 * Print a string left-justified to a fixed width.
 */
static void
ljust_print(char *str, int width)
{
	int	i;

	fmt_print("%s", str);
	for (i = width - strlen(str); i > 0; i--) {
		fmt_print(" ");
	}
}

/*
 * This routine is a modified version of printf.  It handles the cases
 * of silent mode and logging; other than that it is identical to the
 * library version.
 */
/*PRINTFLIKE1*/
void
fmt_print(char *format, ...)
{
	va_list ap;

	va_start(ap, format);

	/*
	 * If we are running silent, skip it.
	 */
	if (option_s == 0) {
		/*
		 * Do the print to standard out.
		 */
		if (need_newline) {
			(void) printf("\n");
		}
		(void) vprintf(format, ap);
		/*
		 * If we are logging, also print to the log file.
		 */
		if (log_file) {
			if (need_newline) {
				(void) fprintf(log_file, "\n");
			}
			(void) vfprintf(log_file, format, ap);
			(void) fflush(log_file);
		}
	}

	need_newline = 0;

	va_end(ap);
}

/*
 * This routine is a modified version of printf.  It handles the cases
 * of silent mode; other than that it is identical to the
 * library version.  It differs from the above printf in that it does
 * not print the message to a log file.
 */
/*PRINTFLIKE1*/
void
nolog_print(char *format, ...)
{
	va_list ap;

	va_start(ap, format);

	/*
	 * If we are running silent, skip it.
	 */
	if (option_s == 0) {
		/*
		 * Do the print to standard out.
		 */
		if (need_newline) {
			(void) printf("\n");
		}
		(void) vprintf(format, ap);
	}

	va_end(ap);

	need_newline = 0;
}

/*
 * This routine is a modified version of printf.  It handles the cases
 * of silent mode, and only prints the message to the log file, not
 * stdout.  Other than that is identical to the library version.
 */
/*PRINTFLIKE1*/
void
log_print(char *format, ...)
{
	va_list ap;

	va_start(ap, format);

	/*
	 * If we are running silent, skip it.
	 */
	if (option_s == 0) {
		/*
		 * Do the print to the log file.
		 */
		if (need_newline) {
			(void) fprintf(log_file, "\n");
		}
		(void) vfprintf(log_file, format, ap);
		(void) fflush(log_file);
	}

	va_end(ap);

	need_newline = 0;
}

/*
 * This routine is a modified version of printf.  It prints the message
 * to stderr, and to the log file is appropriate.
 * Other than that is identical to the library version.
 */
/*PRINTFLIKE1*/
void
err_print(char *format, ...)
{
	va_list ap;

	va_start(ap, format);

	/*
	 * Flush anything pending to stdout
	 */
	if (need_newline) {
		(void) printf("\n");
	}
	(void) fflush(stdout);
	/*
	 * Do the print to stderr.
	 */
	(void) vfprintf(stderr, format, ap);
	/*
	 * If we are logging, also print to the log file.
	 */
	if (log_file) {
		if (need_newline) {
			(void) fprintf(log_file, "\n");
		}
		(void) vfprintf(log_file, format, ap);
		(void) fflush(log_file);
	}
	va_end(ap);

	need_newline = 0;
}

/*
 * Print a number of characters from a buffer.  The buffer
 * does not need to be null-terminated.  Since the data
 * may be coming from a device, we cannot be sure the
 * data is not crud, so be rather defensive.
 */
void
print_buf(char *buf, int nbytes)
{
	int	c;

	while (nbytes-- > 0) {
		c = *buf++;
		if (isascii(c) && isprint(c)) {
			fmt_print("%c", c);
		} else
			break;
	}
}

#ifdef	not
/*
 * This routine prints out a message describing the given ctlr.
 * The message is identical to the one printed by the kernel during
 * booting.
 */
void
pr_ctlrline(struct ctlr_info *ctlr)
{

	fmt_print("           %s%d at %s 0x%x ",
	    ctlr->ctlr_cname, ctlr->ctlr_num,
	    space2str(ctlr->ctlr_space), ctlr->ctlr_addr);
	if (ctlr->ctlr_vec != 0)
		fmt_print("vec 0x%x ", ctlr->ctlr_vec);
	else
		fmt_print("pri %d ", ctlr->ctlr_prio);
	fmt_print("\n");
}
#endif /* not */

/*
 * This routine prints out a message describing the given disk.
 * The message is identical to the one printed by the kernel during
 * booting.
 */
void
pr_diskline(struct disk_info *disk, int	num)
{
	struct	ctlr_info *ctlr = disk->disk_ctlr;
	struct	disk_type *type = disk->disk_type;

	fmt_print("    %4d. %s ", num, disk->disk_name);
	if ((type != NULL) && (disk->label_type == L_TYPE_SOLARIS)) {
		fmt_print("<%s cyl %u alt %u hd %u sec %u>",
		    type->dtype_asciilabel, type->dtype_ncyl,
		    type->dtype_acyl, type->dtype_nhead,
		    type->dtype_nsect);
	} else if ((type != NULL) && (disk->label_type == L_TYPE_EFI)) {
		cur_blksz = disk->disk_lbasize;
		print_efi_string(type->vendor, type->product,
		    type->revision, type->capacity);
	} else if (disk->disk_flags & DSK_RESERVED) {
		fmt_print("<drive not available: reserved>");
	} else if (disk->disk_flags & DSK_UNAVAILABLE) {
		fmt_print("<drive not available>");
	} else {
		fmt_print("<drive type unknown>");
	}
	if (chk_volname(disk)) {
		fmt_print("  ");
		print_volname(disk);
	}
	fmt_print("\n");

	if (disk->devfs_name != NULL) {
		fmt_print("          %s\n", disk->devfs_name);
	} else {
		fmt_print("          %s%d at %s%d slave %d\n",
		    ctlr->ctlr_dname, disk->disk_dkinfo.dki_unit,
		    ctlr->ctlr_cname, ctlr->ctlr_num,
		    disk->disk_dkinfo.dki_slave);
	}

#ifdef	OLD
	fmt_print("    %4d. %s at %s%d slave %d", num, disk->disk_name,
	    ctlr->ctlr_cname, ctlr->ctlr_num, disk->disk_dkinfo.dki_slave);
	if (chk_volname(disk)) {
		fmt_print(": ");
		print_volname(disk);
	}
	fmt_print("\n");
	if (type != NULL) {
		fmt_print("           %s%d: <%s cyl %u alt %u hd %u sec %u>\n",
		    ctlr->ctlr_dname, disk->disk_dkinfo.dki_unit,
		    type->dtype_asciilabel, type->dtype_ncyl,
		    type->dtype_acyl, type->dtype_nhead,
		    type->dtype_nsect);
	} else {
		fmt_print("           %s%d: <drive type unknown>\n",
		    ctlr->ctlr_dname, disk->disk_dkinfo.dki_unit);
	}
#endif /* OLD */
}

/*
 * This routine prints out a given disk block number in cylinder/head/sector
 * format.  It uses the printing routine passed in to do the actual output.
 */
void
pr_dblock(void (*func)(char *, ...), diskaddr_t bn)
{
	if (cur_label == L_TYPE_SOLARIS) {
		(*func)("%u/%u/%u", bn2c(bn),
		    bn2h(bn), bn2s(bn));
	} else {
		(*func)("%llu", bn);
	}
}

/*
 * This routine inputs a character from the data file.  It understands
 * the use of '\' to prevent interpretation of a newline.  It also keeps
 * track of the current line in the data file via a global variable.
 */
static int
sup_inputchar(void)
{
	int	c;

	/*
	 * Input the character.
	 */
	c = getc(data_file);
	/*
	 * If it's not a backslash, return it.
	 */
	if (c != '\\')
		return (c);
	/*
	 * It was a backslash.  Get the next character.
	 */
	c = getc(data_file);
	/*
	 * If it was a newline, update the line counter and get the next
	 * character.
	 */
	if (c == '\n') {
		data_lineno++;
		c = getc(data_file);
	}
	/*
	 * Return the character.
	 */
	return (c);
}

/*
 * This routine pushes a character back onto the input pipe for the data file.
 */
static void
sup_pushchar(int c)
{
	(void) ungetc(c, data_file);
}

/*
 * Variables to support pushing back tokens
 */
static  int	have_pushed_token = 0;
static  TOKEN	pushed_buf;
static  int	pushed_token;

/*
 * This routine inputs a token from the data file.  A token is a series
 * of contiguous non-white characters or a recognized special delimiter
 * character.  Use of the wrapper lets us always have the value of the
 * last token around, which is useful for error recovery.
 */
int
sup_gettoken(char *buf)
{
	last_token_type = sup_get_token(buf);
	return (last_token_type);
}

static int
sup_get_token(char *buf)
{
	char	*ptr = buf;
	int	c, quoted = 0;

	/*
	 * First check for presence of push-backed token.
	 * If so, return it.
	 */
	if (have_pushed_token) {
		have_pushed_token = 0;
		bcopy(pushed_buf, buf, TOKEN_SIZE+1);
		return (pushed_token);
	}
	/*
	 * Zero out the returned token buffer
	 */
	bzero(buf, TOKEN_SIZE + 1);
	/*
	 * Strip off leading white-space.
	 */
	while ((isspace(c = sup_inputchar())) && (c != '\n'))
		;
	/*
	 * Read in characters until we hit unquoted white-space.
	 */
	for (; !isspace(c) || quoted; c = sup_inputchar()) {
		/*
		 * If we hit eof, that's a token.
		 */
		if (feof(data_file))
			return (SUP_EOF);
		/*
		 * If we hit a double quote, change the state of quoting.
		 */
		if (c == '"') {
			quoted = !quoted;
			continue;
		}
		/*
		 * If we hit a newline, that delimits a token.
		 */
		if (c == '\n')
			break;
		/*
		 * If we hit any nonquoted special delimiters, that delimits
		 * a token.
		 */
		if (!quoted && (c == '=' || c == ',' || c == ':' ||
		    c == '#' || c == '|' || c == '&' || c == '~'))
			break;
		/*
		 * Store the character if there's room left.
		 */
		if (ptr - buf < TOKEN_SIZE)
			*ptr++ = (char)c;
	}
	/*
	 * If we stored characters in the buffer, then we inputted a string.
	 * Push the delimiter back into the pipe and return the string.
	 */
	if (ptr - buf > 0) {
		sup_pushchar(c);
		return (SUP_STRING);
	}
	/*
	 * We didn't input a string, so we must have inputted a known delimiter.
	 * store the delimiter in the buffer, so it will get returned.
	 */
	buf[0] = c;
	/*
	 * Switch on the delimiter.  Return the appropriate value for each one.
	 */
	switch (c) {
	case '=':
		return (SUP_EQL);
	case ':':
		return (SUP_COLON);
	case ',':
		return (SUP_COMMA);
	case '\n':
		return (SUP_EOL);
	case '|':
		return (SUP_OR);
	case '&':
		return (SUP_AND);
	case '~':
		return (SUP_TILDE);
	case '#':
		/*
		 * For comments, we flush out the rest of the line and return
		 * an EOL.
		 */
		while ((c = sup_inputchar()) != '\n' && !feof(data_file))
			;
		if (feof(data_file))
			return (SUP_EOF);
		else
			return (SUP_EOL);
	/*
	 * Shouldn't ever get here.
	 */
	default:
		return (SUP_STRING);
	}
}

/*
 * Push back a token
 */
void
sup_pushtoken(char *token_buf, int token_type)
{
	/*
	 * We can only push one token back at a time
	 */
	assert(have_pushed_token == 0);

	have_pushed_token = 1;
	bcopy(token_buf, pushed_buf, TOKEN_SIZE+1);
	pushed_token = token_type;
}

/*
 * Get an entire line of input.  Handles logging, comments,
 * and EOF.
 */
void
get_inputline(char *line, int nbytes)
{
	char	*p = line;
	int	c;

	/*
	 * Remove any leading white-space and comments
	 */
	do {
		while ((isspace(c = getchar())) && (c != '\n'))
			;
	} while (c == COMMENT_CHAR);
	/*
	 * Loop on each character until end of line
	 */
	while (c != '\n') {
		/*
		 * If we hit eof, get out.
		 */
		if (checkeof()) {
			fullabort();
		}
		/*
		 * Add the character to the buffer.
		 */
		if (nbytes > 1) {
			*p++ = (char)c;
			nbytes --;
		}
		/*
		 * Get the next character.
		 */
		c = getchar();
	}
	/*
	 * Null terminate the token.
	 */
	*p = 0;
	/*
	 * Indicate that we've emptied the pipe
	 */
	token_present = 0;
	/*
	 * If we're running out of a file, echo the line to
	 * the user, otherwise if we're logging, copy the
	 * input to the log file.
	 */
	if (option_f) {
		fmt_print("%s\n", line);
	} else if (log_file) {
		log_print("%s\n", line);
	}
}

/*
 * execute the shell escape command
 */
int
execute_shell(char *s, size_t buff_size)
{
	struct	termio	termio;
	struct	termios	tty;
	int	tty_flag, i, j;
	char	*shell_name;
	static char	*default_shell = "/bin/sh";

	tty_flag = -1;

	if (*s == '\0') {
		shell_name = getenv("SHELL");

		if (shell_name == NULL) {
			shell_name = default_shell;
		}
		if (strlcpy(s, shell_name, buff_size) >=
		    buff_size) {
			err_print("Error: Shell command ($SHELL) too long.\n");
			fullabort();
		}
	}

	/* save tty information */

	if (isatty(0)) {
		if (ioctl(0, TCGETS, &tty) == 0)
			tty_flag = 1;
		else {
			if (ioctl(0, TCGETA, &termio) == 0) {
				tty_flag = 0;
				tty.c_iflag = termio.c_iflag;
				tty.c_oflag = termio.c_oflag;
				tty.c_cflag = termio.c_cflag;
				tty.c_lflag = termio.c_lflag;
				for (i = 0; i < NCC; i++)
					tty.c_cc[i] = termio.c_cc[i];
			}
		}
	}

	/* close the current file descriptor */
	if (cur_disk != NULL) {
		(void) close(cur_file);
	}

	/* execute the shell escape */
	(void) system(s);

	/* reopen file descriptor if one was open before */
	if (cur_disk != NULL) {
		if ((cur_file = open_disk(cur_disk->disk_path,
		    O_RDWR | O_NDELAY)) < 0) {
			err_print("Error: can't reopen selected disk '%s'. \n",
			    cur_disk->disk_name);
			fullabort();
		}
	}

	/* Restore tty information */

	if (isatty(0)) {
		if (tty_flag > 0)
			(void) ioctl(0, TCSETSW, &tty);
		else if (tty_flag == 0) {
			termio.c_iflag = tty.c_iflag;
			termio.c_oflag = tty.c_oflag;
			termio.c_cflag = tty.c_cflag;
			termio.c_lflag = tty.c_lflag;
			for (j = 0; j < NCC; j++)
				termio.c_cc[j] = tty.c_cc[j];
			(void) ioctl(0, TCSETAW, &termio);
		}

		if (isatty(1)) {
			fmt_print("\n[Hit Return to continue] \n");
			(void) fflush(stdin);
			if (getchar() == EOF)
				fullabort();
		}
	}
	return (0);
}

void
print_efi_string(char *vendor, char *product, char *revision,
    uint64_t capacity)
{
	char *new_vendor;
	char *new_product;
	char *new_revision;
	char capacity_string[10];
	float scaled;
	int i;

	/* Strip whitespace from the end of inquiry strings */
	new_vendor = strdup(vendor);
	if (new_vendor == NULL)
		return;

	for (i = (strlen(new_vendor) - 1); i >= 0; i--) {
		if (new_vendor[i] != 0x20) {
			new_vendor[i+1] = '\0';
			break;
		}
	}

	new_product = strdup(product);
	if (new_product == NULL) {
		free(new_vendor);
		return;
	}

	for (i = (strlen(new_product) - 1); i >= 0; i--) {
		if (new_product[i] != 0x20) {
			new_product[i+1] = '\0';
			break;
		}
	}

	new_revision = strdup(revision);
	if (new_product == NULL) {
		free(new_vendor);
		free(new_product);
		return;
	}

	for (i = (strlen(new_revision) - 1); i >= 0; i--) {
		if (new_revision[i] != 0x20) {
			new_revision[i+1] = '\0';
			break;
		}
	}

	/* Now build size string */
	scaled = bn2mb(capacity);
	if (scaled >= (float)1024.0 * 1024) {
		(void) snprintf(capacity_string, sizeof (capacity_string),
		    "%.2fTB", scaled/((float)1024.0 * 1024));
	} else if (scaled >= (float)1024.0) {
		(void) snprintf(capacity_string, sizeof (capacity_string),
		    "%.2fGB", scaled/(float)1024.0);
	} else {
		(void) snprintf(capacity_string, sizeof (capacity_string),
		    "%.2fMB", scaled);
	}

	fmt_print("<%s-%s-%s-%s>",
	    new_vendor, new_product, new_revision, capacity_string);

	free(new_revision);
	free(new_product);
	free(new_vendor);
}