100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <sys/wait.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include "macro.h"
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#include "execute.h"
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#include "kmod-setup.h"
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static const char * const kmod_table[] = {
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"autofs4", "/sys/class/misc/autofs",
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"ipv6", "/sys/module/ipv6",
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"unix", "/proc/net/unix"
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};
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int kmod_setup(void) {
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unsigned i, n = 0;
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const char * cmdline[3 + ELEMENTSOF(kmod_table) + 1];
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ExecCommand command;
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ExecContext context;
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pid_t pid;
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int status, r;
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for (i = 0; i < ELEMENTSOF(kmod_table); i += 2) {
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if (access(kmod_table[i+1], F_OK) >= 0)
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continue;
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log_debug("Your kernel apparently lacks built-in %s support. Might be a good idea to compile it in. "
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"We'll now try to work around this by calling '/sbin/modprobe %s'...",
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kmod_table[i], kmod_table[i]);
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cmdline[3 + n++] = kmod_table[i];
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}
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if (n <= 0)
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return 0;
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cmdline[0] = "/sbin/modprobe";
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cmdline[1] = "-qab";
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cmdline[2] = "--";
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cmdline[3 + n] = NULL;
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zero(command);
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zero(context);
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command.path = (char*) cmdline[0];
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command.argv = (char**) cmdline;
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exec_context_init(&context);
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r = exec_spawn(&command, NULL, &context, NULL, 0, NULL, false, false, false, false, NULL, &pid);
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exec_context_done(&context);
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if (r < 0)
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return r;
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if ((r = waitpid_loop(pid, &status)) < 0)
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return -errno;
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if (WIFEXITED(status)) {
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if (WEXITSTATUS(status) != 0) {
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log_warning("/sbin/modprobe failed with error code %i.", WEXITSTATUS(status));
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return -EPROTO;
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}
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log_debug("/sbin/modprobe succeeded.");
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return 0;
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}
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if (WIFSIGNALED(status)) {
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log_warning("/sbin/modprobe terminated by signal %s.", signal_to_string(WTERMSIG(status)));
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return -EPROTO;
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}
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log_warning("/sbin/modprobe failed due to unknown reason.");
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return -EPROTO;
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}
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