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* grub-core/osdep/unix/getroot.c: Move exec functions to ...

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* osdep/unix/exec.c: ... here. Add few additional exec_* variants.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2013-10-19 02:56:40 +02:00
parent d3923ab956
commit 40346de6d3
9 changed files with 269 additions and 79 deletions
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195
grub-core/osdep/unix/exec.c Normal file
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@ -0,0 +1,195 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2006,2007,2008,2009,2010,2011 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 <config-util.h>
#include <config.h>
#include <grub/misc.h>
#include <unistd.h>
#include <grub/emu/exec.h>
#include <grub/emu/hostdisk.h>
#include <grub/emu/getroot.h>
#include <grub/util/misc.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <sys/wait.h>
int
grub_util_exec (const char *const *argv)
{
pid_t pid;
int status = -1;
pid = fork ();
if (pid < 0)
grub_util_error (_("Unable to fork: %s"), strerror (errno));
else if (pid == 0)
{
/* Child. */
/* Close fd's. */
grub_util_devmapper_cleanup ();
grub_diskfilter_fini ();
/* 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_redirect (const char *const *argv, const char *stdin_file,
const char *stdout_file)
{
pid_t mdadm_pid;
int status = -1;
mdadm_pid = fork ();
if (mdadm_pid < 0)
grub_util_error (_("Unable to fork: %s"), strerror (errno));
else if (mdadm_pid == 0)
{
int in, out;
/* Child. */
/* Close fd's. */
grub_util_devmapper_cleanup ();
grub_diskfilter_fini ();
in = open (stdin_file, O_RDONLY);
dup2 (in, STDIN_FILENO);
close (in);
out = open (stdout_file, O_WRONLY | O_CREAT, 0700);
dup2 (out, STDOUT_FILENO);
close (out);
/* Ensure child is not localised. */
setenv ("LC_ALL", "C", 1);
execvp ((char *) argv[0], (char **) argv);
exit (127);
}
waitpid (mdadm_pid, &status, 0);
if (!WIFEXITED (status))
return -1;
return WEXITSTATUS (status);
}
int
grub_util_exec_redirect_null (const char *const *argv)
{
return grub_util_exec_redirect (argv, "/dev/null", "/dev/null");
}
pid_t
grub_util_exec_pipe (const char *const *argv, int *fd)
{
int mdadm_pipe[2];
pid_t mdadm_pid;
*fd = 0;
if (pipe (mdadm_pipe) < 0)
{
grub_util_warn (_("Unable to create pipe: %s"),
strerror (errno));
return 0;
}
mdadm_pid = fork ();
if (mdadm_pid < 0)
grub_util_error (_("Unable to fork: %s"), strerror (errno));
else if (mdadm_pid == 0)
{
/* Child. */
/* Close fd's. */
grub_util_devmapper_cleanup ();
grub_diskfilter_fini ();
/* Ensure child is not localised. */
setenv ("LC_ALL", "C", 1);
close (mdadm_pipe[0]);
dup2 (mdadm_pipe[1], STDOUT_FILENO);
close (mdadm_pipe[1]);
execvp ((char *) argv[0], (char **) argv);
exit (127);
}
else
{
close (mdadm_pipe[1]);
*fd = mdadm_pipe[0];
return mdadm_pid;
}
}
pid_t
grub_util_exec_pipe_stderr (const char *const *argv, int *fd)
{
int mdadm_pipe[2];
pid_t mdadm_pid;
*fd = 0;
if (pipe (mdadm_pipe) < 0)
{
grub_util_warn (_("Unable to create pipe: %s"),
strerror (errno));
return 0;
}
mdadm_pid = fork ();
if (mdadm_pid < 0)
grub_util_error (_("Unable to fork: %s"), strerror (errno));
else if (mdadm_pid == 0)
{
/* Child. */
/* Close fd's. */
grub_util_devmapper_cleanup ();
grub_diskfilter_fini ();
/* Ensure child is not localised. */
setenv ("LC_ALL", "C", 1);
close (mdadm_pipe[0]);
dup2 (mdadm_pipe[1], STDOUT_FILENO);
dup2 (mdadm_pipe[1], STDERR_FILENO);
close (mdadm_pipe[1]);
execvp ((char *) argv[0], (char **) argv);
exit (127);
}
else
{
close (mdadm_pipe[1]);
*fd = mdadm_pipe[0];
return mdadm_pid;
}
}