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/*-*- Mode: C; c-basic-offset: 8 -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd 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 2 of the License, or
(at your option) any later version.
systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <sys/wait.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "macro.h"
#include "execute.h"
#include "kmod-setup.h"
static const char * const kmod_table[] = {
"autofs4", "/sys/class/misc/autofs",
"ipv6", "/sys/module/ipv6"
};
int kmod_setup(void) {
unsigned i, n = 0;
const char * cmdline[3 + ELEMENTSOF(kmod_table) + 1];
ExecCommand command;
ExecContext context;
pid_t pid;
int status, r;
for (i = 0; i < ELEMENTSOF(kmod_table); i += 2) {
if (access(kmod_table[i+1], F_OK) >= 0)
continue;
log_info("Your kernel apparently lacks built-in %s support. Please fix that. "
"We'll now try to work around this by calling '/sbin/modprobe %s'...",
kmod_table[i], kmod_table[i]);
cmdline[3 + n++] = kmod_table[i];
}
if (n <= 0)
return 0;
cmdline[0] = "/sbin/modprobe";
cmdline[1] = "-qab";
cmdline[2] = "--";
cmdline[3 + n] = NULL;
zero(command);
zero(context);
command.path = (char*) cmdline[0];
command.argv = (char**) cmdline;
exec_context_init(&context);
r = exec_spawn(&command, NULL, &context, NULL, 0, NULL, false, false, false, NULL, &pid);
exec_context_done(&context);
if (r < 0)
return r;
for (;;) {
if (waitpid(pid, &status, 0) < 0) {
if (errno == EINTR)
continue;
return -errno;
}
break;
}
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) != 0) {
log_warning("/sbin/modprobe failed with error code %i.", WEXITSTATUS(status));
return -EPROTO;
}
log_debug("/sbin/modprobe succeeded.");
return 0;
}
if (WIFSIGNALED(status)) {
log_warning("/sbin/modprobe terminated by signal %s.", strsignal(WTERMSIG(status)));
return -EPROTO;
}
log_warning("/sbin/modprobe failed due to unknown reason.");
return -EPROTO;
}
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