mirror of
https://git.proxmox.com/git/grub2
synced 2025-11-04 07:23:56 +00:00
134 lines
2.6 KiB
C
134 lines
2.6 KiB
C
/* argv.c - methods for constructing argument vector */
|
|
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2010 Free Software Foundation, Inc.
|
|
*
|
|
* GRUB 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 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <grub/mm.h>
|
|
#include <grub/script_sh.h>
|
|
|
|
/* Return nearest power of two that is >= v. */
|
|
static unsigned
|
|
round_up_exp (unsigned v)
|
|
{
|
|
v--;
|
|
v |= v >> 1;
|
|
v |= v >> 2;
|
|
v |= v >> 4;
|
|
v |= v >> 8;
|
|
v |= v >> 16;
|
|
|
|
if (sizeof (v) > 4)
|
|
v |= v >> 32;
|
|
|
|
v++;
|
|
v += (v == 0);
|
|
|
|
return v;
|
|
}
|
|
|
|
void
|
|
grub_script_argv_free (struct grub_script_argv *argv)
|
|
{
|
|
unsigned i;
|
|
|
|
if (argv->args)
|
|
{
|
|
for (i = 0; i < argv->argc; i++)
|
|
grub_free (argv->args[i]);
|
|
|
|
grub_free (argv->args);
|
|
}
|
|
|
|
argv->argc = 0;
|
|
argv->args = 0;
|
|
}
|
|
|
|
/* Prepare for next argc. */
|
|
int
|
|
grub_script_argv_next (struct grub_script_argv *argv)
|
|
{
|
|
char **p = argv->args;
|
|
|
|
if (argv->args && argv->args[argv->argc - 1] == 0)
|
|
return 0;
|
|
|
|
p = grub_realloc (p, round_up_exp ((argv->argc + 2) * sizeof (char *)));
|
|
if (! p)
|
|
return 1;
|
|
|
|
argv->argc++;
|
|
argv->args = p;
|
|
|
|
if (argv->argc == 1)
|
|
argv->args[0] = 0;
|
|
argv->args[argv->argc] = 0;
|
|
return 0;
|
|
}
|
|
|
|
/* Append `s' to the last argument. */
|
|
int
|
|
grub_script_argv_append (struct grub_script_argv *argv, const char *s)
|
|
{
|
|
int a, b;
|
|
char *p = argv->args[argv->argc - 1];
|
|
|
|
if (! s)
|
|
return 0;
|
|
|
|
a = p ? grub_strlen (p) : 0;
|
|
b = grub_strlen (s);
|
|
|
|
p = grub_realloc (p, round_up_exp ((a + b + 1) * sizeof (char)));
|
|
if (! p)
|
|
return 1;
|
|
|
|
grub_strcpy (p + a, s);
|
|
argv->args[argv->argc - 1] = p;
|
|
return 0;
|
|
}
|
|
|
|
/* Split `s' and append words as multiple arguments. */
|
|
int
|
|
grub_script_argv_split_append (struct grub_script_argv *argv, char *s)
|
|
{
|
|
char ch;
|
|
char *p;
|
|
int errors = 0;
|
|
|
|
if (! s)
|
|
return 0;
|
|
|
|
while (! errors && *s)
|
|
{
|
|
p = s;
|
|
while (*s && ! grub_isspace (*s))
|
|
s++;
|
|
|
|
ch = *s;
|
|
*s = '\0';
|
|
errors += grub_script_argv_append (argv, p);
|
|
*s = ch;
|
|
|
|
while (*s && grub_isspace (*s))
|
|
s++;
|
|
|
|
if (*s)
|
|
errors += grub_script_argv_next (argv);
|
|
}
|
|
return errors;
|
|
}
|