grub/util/misc.c

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2002-12-27 08:53:07 +00:00
/*
* PUPA -- Preliminary Universal Programming Architecture for GRUB
* Copyright (C) 2002 Yoshinori K. Okuji <okuji@enbug.org>
*
* PUPA is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with PUPA; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <pupa/util/misc.h>
char *progname = 0;
int verbosity = 0;
void
pupa_util_info (const char *fmt, ...)
{
if (verbosity > 0)
{
va_list ap;
fprintf (stderr, "%s: info: ", progname);
va_start (ap, fmt);
vfprintf (stderr, fmt, ap);
va_end (ap);
fputc ('\n', stderr);
}
}
void
pupa_util_error (const char *fmt, ...)
{
va_list ap;
fprintf (stderr, "%s: error: ", progname);
va_start (ap, fmt);
vfprintf (stderr, fmt, ap);
va_end (ap);
fputc ('\n', stderr);
exit (1);
}
void *
xmalloc (size_t size)
{
void *p;
p = malloc (size);
if (! p)
pupa_util_error ("out of memory");
return p;
}
char *
xstrdup (const char *str)
{
size_t len;
char *dup;
len = strlen (str);
dup = (char *) xmalloc (len + 1);
memcpy (dup, str, len + 1);
return dup;
}
char *
pupa_util_get_path (const char *dir, const char *file)
{
char *path;
path = (char *) xmalloc (strlen (dir) + 1 + strlen (file) + 1);
sprintf (path, "%s/%s", dir, file);
return path;
}
size_t
pupa_util_get_image_size (const char *path)
{
struct stat st;
pupa_util_info ("getting the size of %s", path);
if (stat (path, &st) == -1)
pupa_util_error ("cannot stat %s", path);
return st.st_size;
}
char *
pupa_util_read_image (const char *path)
{
char *img;
FILE *fp;
size_t size;
pupa_util_info ("reading %s", path);
size = pupa_util_get_image_size (path);
img = (char *) xmalloc (size);
fp = fopen (path, "rb");
if (! fp)
pupa_util_error ("cannot open %s", path);
if (fread (img, 1, size, fp) != size)
pupa_util_error ("cannot read %s", path);
return img;
}
void
pupa_util_write_image (const char *img, size_t size, FILE *out)
{
pupa_util_info ("writing 0x%x bytes", size);
if (fwrite (img, 1, size, out) != size)
pupa_util_error ("write failed");
}