diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/modules-load.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/src/modules-load.c b/src/modules-load.c new file mode 100644 index 0000000000..44ff02e7b8 --- /dev/null +++ b/src/modules-load.c @@ -0,0 +1,167 @@ +/*-*- 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 = 1, n, i; + char **arguments = NULL; + unsigned n_arguments = 0, n_allocated = 0; + + if (argc > 1) { + log_error("This program takes no argument."); + return 1; + } + + 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 = 0; + else + log_error("Failed to enumerate /etc/modules.d/ files: %m"); + + goto finish; + } + + r = 0; + + 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 = 1; + continue; + } + + f = fopen(fn, "re"); + free(fn); + + if (!f) { + log_error("Failed to open %s: %m", fn); + r = 1; + 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 = 1; + continue; + } + + arguments = a; + n_allocated = m; + } + + arguments[n_arguments++] = t; + } + + if (ferror(f)) { + r = 1; + 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 = 1; + } + + strv_free(arguments); + + return r; +} |