debugfs/util.c

/*
 * util.c --- utilities for the debugfs program
 * 
 * Copyright (C) 1993, 1994 Theodore Ts'o.  This file may be
 * redistributed under the terms of the GNU Public License.
 *
 */

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>

#include "debugfs.h"

FILE *open_pager(void)
{
	FILE *outfile;
	char *pager = getenv("PAGER");

	if (!pager)
		outfile = stdout;
	else {
		outfile = popen(pager, "w");
		if (!outfile) outfile = stdout;
	}
	return (outfile);
}

void close_pager(FILE *stream)
{
	if (stream && stream != stdout) fclose(stream);
}

/*
 * This routine is used whenever a command needs to turn a string into
 * an inode.
 */
ino_t string_to_inode(char *str)
{
	ino_t	ino;
	int	len = strlen(str);
	int	i;
	int	retval;

	/*
	 * If the string is of the form <ino>, then treat it as an
	 * inode number.
	 */
	if ((len > 2) && (str[0] == '<') && (str[len-1] == '>')) {
		for (i = 1; i < len-1; i++)
			if (!isdigit(str[i]))
				break;
		if (i == len-1)
			return(atoi(str+1));
	}

	retval = ext2fs_namei(fs, root, cwd, str, &ino);
	if (retval) {
		com_err(str, retval, "");
		return 0;
	}
	return ino;
}

/*
 * This routine returns 1 if the filesystem is not open, and prints an
 * error message to that effect.
 */
int check_fs_open(char *name)
{
	if (!fs) {
		com_err(name, 0, "Filesystem not open");
		return 1;
	}
	return 0;
}

/*
 * This routine returns 1 if a filesystem is open, and prints an
 * error message to that effect.
 */
int check_fs_not_open(char *name)
{
	if (fs) {
		com_err(name, 0,
			"Filesystem %s is still open.  Close it first.\n",
			fs->device_name);
		return 1;
	}
	return 0;
}