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glib/win32: check if dup() failed in helper process

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Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
This commit is contained in:
Marc-André Lureau 2022-01-26 19:40:55 +04:00
parent 34ce1b1f93
commit 674072b139
2 changed files with 31 additions and 30 deletions
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55
glib/gspawn-win32-helper.c
View File

@ -153,6 +153,21 @@ protect_wargv (gint argc,
return argc;
}
static int
checked_dup2 (int oldfd, int newfd, int report_fd, gboolean close_old)
{
if (oldfd == newfd)
return newfd;
if (dup2 (oldfd, newfd) == -1)
write_err_and_exit (report_fd, CHILD_DUP_FAILED);
if (close_old)
close (oldfd);
return newfd;
}
#if (defined (_MSC_VER) && _MSC_VER >= 1400)
/*
* This is the (empty) invalid parameter handler
@ -255,20 +270,12 @@ main (int ignored_argc, char **ignored_argv)
else if (argv[ARG_STDIN][0] == 'z')
{
fd = open ("NUL:", O_RDONLY);
if (fd != 0)
{
dup2 (fd, 0);
close (fd);
}
checked_dup2 (fd, 0, child_err_report_fd, TRUE);
}
else
{
fd = atoi (argv[ARG_STDIN]);
if (fd != 0)
{
dup2 (fd, 0);
close (fd);
}
checked_dup2 (fd, 0, child_err_report_fd, TRUE);
}
if (argv[ARG_STDOUT][0] == '-')
@ -276,42 +283,28 @@ main (int ignored_argc, char **ignored_argv)
else if (argv[ARG_STDOUT][0] == 'z')
{
fd = open ("NUL:", O_WRONLY);
if (fd != 1)
{
dup2 (fd, 1);
close (fd);
}
checked_dup2 (fd, 1, child_err_report_fd, TRUE);
}
else
{
fd = atoi (argv[ARG_STDOUT]);
if (fd != 1)
{
dup2 (fd, 1);
close (fd);
}
checked_dup2 (fd, 1, child_err_report_fd, TRUE);
}
saved_stderr_fd = reopen_noninherited (dup (2), _O_WRONLY);
if (saved_stderr_fd == -1)
write_err_and_exit (child_err_report_fd, CHILD_DUP_FAILED);
if (argv[ARG_STDERR][0] == '-')
; /* Nothing */
else if (argv[ARG_STDERR][0] == 'z')
{
fd = open ("NUL:", O_WRONLY);
if (fd != 2)
{
dup2 (fd, 2);
close (fd);
}
checked_dup2 (fd, 2, child_err_report_fd, TRUE);
}
else
{
fd = atoi (argv[ARG_STDERR]);
if (fd != 2)
{
dup2 (fd, 2);
close (fd);
}
checked_dup2 (fd, 2, child_err_report_fd, TRUE);
}
/* argv[ARG_WORKING_DIRECTORY] is the directory in which to run the
@ -337,6 +330,8 @@ main (int ignored_argc, char **ignored_argv)
*/
child_err_report_fd = reopen_noninherited (child_err_report_fd, _O_WRONLY);
helper_sync_fd = reopen_noninherited (helper_sync_fd, _O_RDONLY);
if (helper_sync_fd == -1)
write_err_and_exit (child_err_report_fd, CHILD_DUP_FAILED);
/* argv[ARG_WAIT] is "w" to wait for the program to exit */
if (argv[ARG_WAIT][0] == 'w')

6
glib/gspawn-win32.c
View File

@ -89,6 +89,7 @@ enum
CHILD_CHDIR_FAILED,
CHILD_SPAWN_FAILED,
CHILD_SPAWN_NOENT,
CHILD_DUP_FAILED,
};
enum {
@ -393,6 +394,11 @@ set_child_error (gintptr report[2],
_("Failed to execute child process (%s)"),
g_strerror (report[1]));
break;
case CHILD_DUP_FAILED:
g_set_error (error, G_SPAWN_ERROR, G_SPAWN_ERROR_FAILED,
_("Failed to dup() in child process (%s)"),
g_strerror (report[1]));
break;
default:
g_assert_not_reached ();
}