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Rewrite grub-install, grub-mkrescue, grub-mkstandalone and grub-mknetdir

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the function of these files exceeds what can be sanely handled in shell
	in posix-comaptible way. Also writing it in C extends the functionality
	to non-UNIX-like OS and minimal environments.
This commit is contained in:
Vladimir Serbinenko 2013-11-16 20:21:16 +01:00
parent 9ef81064a3
commit cd46aa6cef
52 changed files with 5811 additions and 2101 deletions
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45
grub-core/osdep/unix/exec.c
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@ -38,6 +38,23 @@ grub_util_exec (const char *const *argv)
{
pid_t pid;
int status = -1;
char *str, *pstr;
const char *const *ptr;
grub_size_t strl = 0;
for (ptr = argv; *ptr; ptr++)
strl += grub_strlen (*ptr) + 1;
pstr = str = xmalloc (strl);
for (ptr = argv; *ptr; ptr++)
{
pstr = grub_stpcpy (pstr, *ptr);
*pstr++ = ' ';
}
if (pstr > str)
pstr--;
*pstr = '\0';
grub_util_info ("executing %s", str);
grub_free (str);
pid = fork ();
if (pid < 0)
@ -71,6 +88,29 @@ grub_util_exec_redirect (const char *const *argv, const char *stdin_file,
{
pid_t mdadm_pid;
int status = -1;
char *str, *pstr;
const char *const *ptr;
grub_size_t strl = 0;
for (ptr = argv; *ptr; ptr++)
strl += grub_strlen (*ptr) + 1;
strl += grub_strlen (stdin_file) + 2;
strl += grub_strlen (stdout_file) + 2;
pstr = str = xmalloc (strl);
for (ptr = argv; *ptr; ptr++)
{
pstr = grub_stpcpy (pstr, *ptr);
*pstr++ = ' ';
}
*pstr++ = '<';
pstr = grub_stpcpy (pstr, stdin_file);
*pstr++ = ' ';
*pstr++ = '>';
pstr = grub_stpcpy (pstr, stdout_file);
*pstr = '\0';
grub_util_info ("executing %s", str);
grub_free (str);
mdadm_pid = fork ();
if (mdadm_pid < 0)
@ -87,6 +127,8 @@ grub_util_exec_redirect (const char *const *argv, const char *stdin_file,
#endif
in = open (stdin_file, O_RDONLY);
if (in < 0)
exit (127);
dup2 (in, STDIN_FILENO);
close (in);
@ -94,6 +136,9 @@ grub_util_exec_redirect (const char *const *argv, const char *stdin_file,
dup2 (out, STDOUT_FILENO);
close (out);
if (out < 0)
exit (127);
/* Ensure child is not localised. */
setenv ("LC_ALL", "C", 1);