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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
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 <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include <limits.h>
#include <dirent.h>
#include "log.h"
#include "util.h"
#include "strv.h"
/* This reads all module names listed in /etc/modules.d/?*.modules and
* loads them into the kernel. This follows roughly Debian's way to
* handle modules, but uses a directory of fragments instead of a
* single /etc/modules file. */
static int scandir_filter(const struct dirent *d) {
assert(d);
if (ignore_file(d->d_name))
return 0;
if (d->d_type != DT_REG &&
d->d_type != DT_LNK)
return 0;
return endswith(d->d_name, ".modules");
}
int main(int argc, char *argv[]) {
struct dirent **de = NULL;
int r = EXIT_FAILURE, n, i;
char **arguments = NULL;
unsigned n_arguments = 0, n_allocated = 0;
if (argc > 1) {
log_error("This program takes no argument.");
return EXIT_FAILURE;
}
log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
log_parse_environment();
log_open();
if (!(arguments = strv_new("/sbin/modprobe", "-sab", "--", NULL))) {
log_error("Failed to allocate string array");
goto finish;
}
n_arguments = n_allocated = 3;
if ((n = scandir("/etc/modules.d/", &de, scandir_filter, alphasort)) < 0) {
if (errno == ENOENT)
r = EXIT_SUCCESS;
else
log_error("Failed to enumerate /etc/modules.d/ files: %m");
goto finish;
}
r = EXIT_SUCCESS;
for (i = 0; i < n; i++) {
int k;
char *fn;
FILE *f;
k = asprintf(&fn, "/etc/modules.d/%s", de[i]->d_name);
free(de[i]);
if (k < 0) {
log_error("Failed to allocate file name.");
r = EXIT_FAILURE;
continue;
}
f = fopen(fn, "re");
free(fn);
if (!f) {
log_error("Failed to open %s: %m", fn);
r = EXIT_FAILURE;
continue;
}
for (;;) {
char line[LINE_MAX], *l, *t;
if (!(fgets(line, sizeof(line), f)))
break;
l = strstrip(line);
if (*l == '#' || *l == 0)
continue;
if (!(t = strdup(l))) {
log_error("Failed to allocate module name.");
continue;
}
if (n_arguments >= n_allocated) {
char **a;
unsigned m;
m = MAX(16U, n_arguments*2);
if (!(a = realloc(arguments, sizeof(char*) * (m+1)))) {
log_error("Failed to increase module array size.");
free(t);
r = EXIT_FAILURE;
continue;
}
arguments = a;
n_allocated = m;
}
arguments[n_arguments++] = t;
}
if (ferror(f)) {
r = EXIT_FAILURE;
log_error("Failed to read from file: %m");
}
fclose(f);
}
free(de);
finish:
if (n_arguments > 3) {
arguments[n_arguments] = NULL;
execv("/sbin/modprobe", arguments);
log_error("Failed to execute /sbin/modprobe: %m");
r = EXIT_FAILURE;
}
strv_free(arguments);
return r;
}
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