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/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2014 Inktank Storage, Inc.
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include "acconfig.h"
#include "include/compat.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if defined(__FreeBSD__)
#include <sys/wait.h>
#endif
#ifndef _WIN32
/*
* TODO: Switch to libkmod when we abandon older platforms. The APIs
* we want are:
*
* - kmod_module_new_from_name() for obtaining handles;
* - kmod_module_probe_insert_module() for module_load();
* - kmod_module_get_info(), kmod_module_info_get_{key,value}() for
* module_has_param().
*/
/*
* Return command's exit status or -1 on error.
*/
static int run_command(const char *command)
{
int status;
status = system(command);
if (status >= 0 && WIFEXITED(status))
return WEXITSTATUS(status);
if (status < 0) {
char error_buf[80];
char* errp = ceph_strerror_r(errno, error_buf, sizeof(error_buf));
fprintf(stderr, "couldn't run '%s': %s\n", command,
errp);
} else if (WIFSIGNALED(status)) {
fprintf(stderr, "'%s' killed by signal %d\n", command,
WTERMSIG(status));
} else {
fprintf(stderr, "weird status from '%s': %d\n", command,
status);
}
return -1;
}
int module_has_param(const char *module, const char *param)
{
char command[128];
snprintf(command, sizeof(command),
"/sbin/modinfo -F parm %s | /bin/grep -q ^%s:",
module, param);
return run_command(command) == 0;
}
int module_load(const char *module, const char *options)
{
char command[128];
snprintf(command, sizeof(command), "/sbin/modprobe %s %s",
module, (options ? options : ""));
return run_command(command);
}
#else
// We're stubbing out those functions, for now.
int module_has_param(const char *module, const char *param)
{
return -1;
}
int module_load(const char *module, const char *options)
{
return -1;
}
#endif /* _WIN32 */
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