/*-*- 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-load.d/?*.conf 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, ".conf"); } 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-load.d/", &de, scandir_filter, alphasort)) < 0) { if (errno == ENOENT) r = EXIT_SUCCESS; else log_error("Failed to enumerate /etc/modules-load.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-load.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; }