static void _print_version(void)
{
print_slurm_version();
if (quiet_flag == -1) {
long version = slurm_api_version();
printf("slurm_api_version: %ld, %ld.%ld.%ld\n", version,
SLURM_VERSION_MAJOR(version),
SLURM_VERSION_MINOR(version),
SLURM_VERSION_MICRO(version));
}
}
int
plugin_peek( const char *fq_path,
char *plugin_type,
const size_t type_len,
uint32_t *plugin_version )
{
plugin_handle_t plug;
char *type;
uint32_t *version;
plug = dlopen( fq_path, RTLD_LAZY );
if ( plug == NULL ) {
debug3( "plugin_peek: dlopen(%s): %s", fq_path, _dlerror() );
return SLURM_ERROR;
}
if ( ( type = dlsym( plug, PLUGIN_TYPE ) ) != NULL ) {
if ( plugin_type != NULL ) {
strlcpy(plugin_type, type, type_len);
}
} else {
dlclose( plug );
/* could be vestigial library, don't treat as an error */
verbose( "%s: not a Slurm plugin", fq_path );
return SLURM_ERROR;
}
version = (uint32_t *) dlsym(plug, PLUGIN_VERSION);
if (!version) {
verbose("%s: plugin_version symbol not defined", fq_path);
} else if ((*version != SLURM_VERSION_NUMBER) && xstrcmp(type,"spank")){
/* NOTE: We could alternatly test just the MAJOR.MINOR values */
int plugin_major, plugin_minor, plugin_micro;
plugin_major = SLURM_VERSION_MAJOR(*version);
plugin_minor = SLURM_VERSION_MINOR(*version);
plugin_micro = SLURM_VERSION_MICRO(*version);
dlclose(plug);
info("%s: Incompatible Slurm plugin version (%d.%d.%d)",
fq_path, plugin_major, plugin_minor, plugin_micro);
return SLURM_ERROR;
}
dlclose( plug );
return SLURM_SUCCESS;
}
plugin_err_t
plugin_load_from_file(plugin_handle_t *p, const char *fq_path)
{
plugin_handle_t plug;
int (*init)(void);
uint32_t *version;
char *type = NULL;
*p = PLUGIN_INVALID_HANDLE;
/*
* Check for file existence and access permissions
*/
if (access(fq_path, R_OK) < 0) {
if (errno == ENOENT)
return EPLUGIN_NOTFOUND;
else
return EPLUGIN_ACCESS_ERROR;
}
/*
* Try to open the shared object.
*
* Use RTLD_LAZY to allow plugins to use symbols that may be
* defined in only one slurm entity (e.g. srun and not slurmd),
* when the use of that symbol is restricted to within the
* entity from which it is available. (i.e. srun symbols are only
* used in the context of srun, not slurmd.)
*
*/
plug = dlopen(fq_path, RTLD_LAZY);
if (plug == NULL) {
error("plugin_load_from_file: dlopen(%s): %s",
fq_path,
_dlerror());
return EPLUGIN_DLOPEN_FAILED;
}
/* Now see if our required symbols are defined. */
if ((dlsym(plug, PLUGIN_NAME) == NULL) ||
((type = dlsym(plug, PLUGIN_TYPE)) == NULL)) {
dlclose(plug);
return EPLUGIN_MISSING_NAME;
}
version = (uint32_t *) dlsym(plug, PLUGIN_VERSION);
if (!version) {
verbose("%s: plugin_version symbol not defined", fq_path);
} else if ((*version != SLURM_VERSION_NUMBER) && xstrcmp(type,"spank")){
/* NOTE: We could alternatly test just the MAJOR.MINOR values */
int plugin_major, plugin_minor, plugin_micro;
plugin_major = SLURM_VERSION_MAJOR(*version);
plugin_minor = SLURM_VERSION_MINOR(*version);
plugin_micro = SLURM_VERSION_MICRO(*version);
dlclose(plug);
info("%s: Incompatible Slurm plugin version (%d.%d.%d)",
fq_path, plugin_major, plugin_minor, plugin_micro);
return EPLUGIN_BAD_VERSION;
}
/*
* Now call its init() function, if present. If the function
* returns nonzero, unload the plugin and signal an error.
*/
if ((init = dlsym(plug, "init")) != NULL) {
if ((*init)() != 0) {
dlclose(plug);
return EPLUGIN_INIT_FAILED;
}
}
*p = plug;
return EPLUGIN_SUCCESS;
}
