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consolidate grub_util_exec code

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We need to hide "modprobe efivars" error output to avoid confusion. So
consolidate grub_util_exec_* into single function that can optionally redirect
all three standard descriptors and make all other functions compatibility
wrappers.

Also remove include/grub/osdep/exec_unix.h which does not appear to be used
anywhere.
This commit is contained in:
Andrey Borzenkov 2013-12-16 22:41:15 +04:00
parent 316c8d9a18
commit 396311f0f6
3 changed files with 71 additions and 111 deletions
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134
grub-core/osdep/unix/exec.c
View file

@ -34,7 +34,8 @@
#include <sys/wait.h>
int
grub_util_exec (const char *const *argv)
grub_util_exec_redirect_all (const char *const *argv, const char *stdin_file,
const char *stdout_file, const char *stderr_file)
{
pid_t pid;
int status = -1;
@ -43,15 +44,39 @@ grub_util_exec (const char *const *argv)
grub_size_t strl = 0;
for (ptr = argv; *ptr; ptr++)
strl += grub_strlen (*ptr) + 1;
if (stdin_file)
strl += grub_strlen (stdin_file) + 2;
if (stdout_file)
strl += grub_strlen (stdout_file) + 2;
if (stderr_file)
strl += grub_strlen (stderr_file) + 3;
pstr = str = xmalloc (strl);
for (ptr = argv; *ptr; ptr++)
{
pstr = grub_stpcpy (pstr, *ptr);
*pstr++ = ' ';
}
if (pstr > str)
pstr--;
*pstr = '\0';
if (stdin_file)
{
*pstr++ = '<';
pstr = grub_stpcpy (pstr, stdin_file);
*pstr++ = ' ';
}
if (stdout_file)
{
*pstr++ = '>';
pstr = grub_stpcpy (pstr, stdout_file);
*pstr++ = ' ';
}
if (stderr_file)
{
*pstr++ = '2';
*pstr++ = '>';
pstr = grub_stpcpy (pstr, stderr_file);
pstr++;
}
*--pstr = '\0';
grub_util_info ("executing %s", str);
grub_free (str);
@ -61,6 +86,7 @@ grub_util_exec (const char *const *argv)
grub_util_error (_("Unable to fork: %s"), strerror (errno));
else if (pid == 0)
{
int fd;
/* Child. */
/* Close fd's. */
@ -69,92 +95,62 @@ grub_util_exec (const char *const *argv)
grub_diskfilter_fini ();
#endif
if (stdin_file)
{
fd = open (stdin_file, O_RDONLY);
if (fd < 0)
exit (127);
dup2 (fd, STDIN_FILENO);
close (fd);
}
if (stdout_file)
{
fd = open (stdout_file, O_WRONLY | O_CREAT, 0700);
if (fd < 0)
exit (127);
dup2 (fd, STDOUT_FILENO);
close (fd);
}
if (stderr_file)
{
fd = open (stderr_file, O_WRONLY | O_CREAT, 0700);
if (fd < 0)
exit (127);
dup2 (fd, STDERR_FILENO);
close (fd);
}
/* Ensure child is not localised. */
setenv ("LC_ALL", "C", 1);
execvp ((char *) argv[0], (char **) argv);
exit (127);
}
waitpid (pid, &status, 0);
if (!WIFEXITED (status))
return -1;
return WEXITSTATUS (status);
}
int
grub_util_exec (const char *const *argv)
{
return grub_util_exec_redirect_all (argv, NULL, NULL, NULL);
}
int
grub_util_exec_redirect (const char *const *argv, const char *stdin_file,
const char *stdout_file)
{
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;
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);
pid = fork ();
if (pid < 0)
grub_util_error (_("Unable to fork: %s"), strerror (errno));
else if (pid == 0)
{
int in, out;
/* Child. */
/* Close fd's. */
#ifdef GRUB_UTIL
grub_util_devmapper_cleanup ();
grub_diskfilter_fini ();
#endif
in = open (stdin_file, O_RDONLY);
if (in < 0)
exit (127);
dup2 (in, STDIN_FILENO);
close (in);
out = open (stdout_file, O_WRONLY | O_CREAT, 0700);
dup2 (out, STDOUT_FILENO);
close (out);
if (out < 0)
exit (127);
/* Ensure child is not localised. */
setenv ("LC_ALL", "C", 1);
execvp ((char *) argv[0], (char **) argv);
exit (127);
}
waitpid (pid, &status, 0);
if (!WIFEXITED (status))
return -1;
return WEXITSTATUS (status);
return grub_util_exec_redirect_all (argv, stdin_file, stdout_file, NULL);
}
int
grub_util_exec_redirect_null (const char *const *argv)
{
return grub_util_exec_redirect (argv, "/dev/null", "/dev/null");
return grub_util_exec_redirect_all (argv, "/dev/null", "/dev/null", NULL);
}
pid_t

3
include/grub/emu/exec.h
View file

@ -28,6 +28,9 @@ grub_util_exec_pipe (const char *const *argv, int *fd);
pid_t
grub_util_exec_pipe_stderr (const char *const *argv, int *fd);
int
grub_util_exec_redirect_all (const char *const *argv, const char *stdin_file,
const char *stdout_file, const char *stderr_file);
int
grub_util_exec (const char *const *argv);
int

39
include/grub/osdep/exec_unix.h
View file

@ -1,39 +0,0 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2013 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/>.
*/
#ifndef GRUB_EMU_EXEC_H
#define GRUB_EMU_EXEC_H 1
#include <config.h>
#include <stdarg.h>
#include <sys/types.h>
pid_t
grub_util_exec_pipe (const char *const *argv, int *fd);
pid_t
grub_util_exec_pipe_stderr (const char *const *argv, int *fd);
int
grub_util_exec (const char *const *argv);
int
grub_util_exec_redirect (const char *const *argv, const char *stdin_file,
const char *stdout_file);
int
grub_util_exec_redirect_null (const char *const *argv);
#endif