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* grub-core/commands/echo.c (grub_cmd_echo): Make UTF-8-clean by

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constructing a new unescaped string and passing it to grub_xputs in
one go, rather than passing characters to grub_printf one at a time.
This commit is contained in:
Colin Watson 2010-12-21 13:52:07 +00:00
parent b889cfadf9
commit d060ad60ee
2 changed files with 24 additions and 8 deletions
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6
ChangeLog
View file

@ -1,3 +1,9 @@
2010-12-21 Colin Watson <cjwatson@ubuntu.com>
* grub-core/commands/echo.c (grub_cmd_echo): Make UTF-8-clean by
constructing a new unescaped string and passing it to grub_xputs in
one go, rather than passing characters to grub_printf one at a time.
2010-12-21 Colin Watson <cjwatson@ubuntu.com>
* grub-core/fs/udf.c (read_string): Pacify GCC warning by

26
grub-core/commands/echo.c
View file

@ -44,8 +44,14 @@ grub_cmd_echo (grub_extcmd_context_t ctxt, int argc, char **args)
for (i = 0; i < argc; i++)
{
char *arg = *args;
/* Unescaping results in a string no longer than the original. */
char *unescaped = grub_malloc (grub_strlen (arg) + 1);
char *p = unescaped;
args++;
if (!unescaped)
return grub_errno;
while (*arg)
{
/* In case `-e' is used, parse backslashes. */
@ -58,11 +64,11 @@ grub_cmd_echo (grub_extcmd_context_t ctxt, int argc, char **args)
switch (*arg)
{
case '\\':
grub_printf ("\\");
*p++ = '\\';
break;
case 'a':
grub_printf ("\a");
*p++ = '\a';
break;
case 'c':
@ -70,23 +76,23 @@ grub_cmd_echo (grub_extcmd_context_t ctxt, int argc, char **args)
break;
case 'f':
grub_printf ("\f");
*p++ = '\f';
break;
case 'n':
grub_printf ("\n");
*p++ = '\n';
break;
case 'r':
grub_printf ("\r");
*p++ = '\r';
break;
case 't':
grub_printf ("\t");
*p++ = '\t';
break;
case 'v':
grub_printf ("\v");
*p++ = '\v';
break;
}
arg++;
@ -95,10 +101,14 @@ grub_cmd_echo (grub_extcmd_context_t ctxt, int argc, char **args)
/* This was not an escaped character, or escaping is not
enabled. */
grub_printf ("%c", *arg);
*p++ = *arg;
arg++;
}
*p = '\0';
grub_xputs (unescaped);
grub_free (unescaped);
/* If another argument follows, insert a space. */
if (i != argc - 1)
grub_printf (" " );