freebsd-nq/usr.sbin/sade/misc.c

/*
 * Miscellaneous support routines..
 *
 * $FreeBSD$
 *
 * Copyright (c) 1995
 *	Jordan Hubbard.  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,
 *    verbatim and that no modifications are made prior to this
 *    point in the file.
 * 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 JORDAN HUBBARD ``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 JORDAN HUBBARD OR HIS PETS 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, LIFE 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.
 *
 */

#include "sade.h"
#include <ctype.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/errno.h>
#include <sys/file.h>
#include <sys/types.h>
#include <dirent.h>
#include <sys/wait.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <ufs/ufs/ufsmount.h>
#include <sys/reboot.h>
#include <sys/disklabel.h>
#include <fs/msdosfs/msdosfsmount.h>

/* Quick check to see if a file is readable */
Boolean
file_readable(char *fname)
{
    if (!access(fname, F_OK))
	return TRUE;
    return FALSE;
}

/* sane strncpy() function */
char *
sstrncpy(char *dst, const char *src, int size)
{
    dst[size] = '\0';
    return strncpy(dst, src, size);
}

/* Clip the whitespace off the end of a string */
char *
string_prune(char *str)
{
    int len = str ? strlen(str) : 0;

    while (len && isspace(str[len - 1]))
	str[--len] = '\0';
    return str;
}

/* run the whitespace off the front of a string */
char *
string_skipwhite(char *str)
{
    while (*str && isspace(*str))
	++str;
    return str;
}

Boolean
directory_exists(const char *dirname)
{
    DIR *tptr;

    if (!dirname)
	return FALSE;
    if (!strlen(dirname))
	return FALSE;

    tptr = opendir(dirname);
    if (!tptr)
	return (FALSE);

    closedir(tptr);
    return (TRUE);
}

/* A free guaranteed to take NULL ptrs */
void
safe_free(void *ptr)
{
    if (ptr)
	free(ptr);
}

/* A malloc that checks errors */
void *
safe_malloc(size_t size)
{
    void *ptr;

    if (size <= 0)
	msgFatal("Invalid malloc size of %ld!", (long)size);
    ptr = malloc(size);
    if (!ptr)
	msgFatal("Out of memory!");
    bzero(ptr, size);
    return ptr;
}

int
Mkdir(char *ipath)
{
    struct stat sb;
    int final;
    char *p, *path;

    if (file_readable(ipath) || Fake)
	return DITEM_SUCCESS;

    path = strcpy(alloca(strlen(ipath) + 1), ipath);
    if (isDebug())
	msgDebug("mkdir(%s)\n", path);
    p = path;
    if (p[0] == '/')		/* Skip leading '/'. */
	++p;
    for (final = FALSE; !final; ++p) {
	if (p[0] == '\0' || (p[0] == '/' && p[1] == '\0'))
	    final = TRUE;
	else if (p[0] != '/')
	    continue;
	*p = '\0';
	if (stat(path, &sb)) {
	    if (errno != ENOENT) {
		msgConfirm("Couldn't stat directory %s: %s", path, strerror(errno));
		return DITEM_FAILURE;
	    }
	    if (isDebug())
		msgDebug("mkdir(%s..)\n", path);
	    if (mkdir(path, S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
		msgConfirm("Couldn't create directory %s: %s", path,strerror(errno));
		return DITEM_FAILURE;
	    }
	}
	*p = '/';
    }
    return DITEM_SUCCESS;
}

int
Mount(char *mountp, void *dev)
{
    struct ufs_args ufsargs;
    char device[80];
    char mountpoint[FILENAME_MAX];

    if (Fake)
	return DITEM_SUCCESS;

    if (*((char *)dev) != '/') {
    	sprintf(device, "/dev/%s", (char *)dev);
	sprintf(mountpoint, "%s", mountp);
    }
    else {
	strcpy(device, dev);
	strcpy(mountpoint, mountp);
    }
    memset(&ufsargs,0,sizeof ufsargs);

    if (Mkdir(mountpoint)) {
	msgConfirm("Unable to make directory mountpoint for %s!", mountpoint);
	return DITEM_FAILURE;
    }
    if (isDebug())
	msgDebug("mount %s %s\n", device, mountpoint);

    ufsargs.fspec = device;
    if (mount("ufs", mountpoint, 0,
	(caddr_t)&ufsargs) == -1) {
	msgConfirm("Error mounting %s on %s : %s", device, mountpoint, strerror(errno));
	return DITEM_FAILURE;
    }
    return DITEM_SUCCESS;
}

WINDOW *
savescr(void)
{
    WINDOW *w;

    w = dupwin(newscr);
    return w;
}

void
restorescr(WINDOW *w)
{
    touchwin(w);
    wrefresh(w);
    delwin(w);
}