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/* See LICENSE file for copyright and license details. */
#include "common.h"
/**
* Get the adjustment method and site
*
* SIGCHLD must not be ignored or blocked
*
* @param method The adjustment method, `NULL` for automatic
* @param site The site, `NULL` for automatic
* @param methodp Output pointer for the selected adjustment method,
* which cannot be `NULL`. It is safe to call
* this function with this parameter set to `NULL`.
* @param sitep Output pointer for the selected site, which will
* be `NULL` the method only supports one site or if
* `site == NULL` and no site can be selected
* automatically. It is safe to call this function
* with this parameter set to `NULL`.
* @return Zero on success, -1 on error
*/
int
libcoopgamma_get_method_and_site(const char *restrict method, const char *restrict site,
char **restrict methodp, char **restrict sitep)
{
int saved_errno;
char *raw;
char *p;
char *q;
raw = libcoopgamma_query__(method, site, "-q");
if (!raw)
return -1;
if (methodp) *methodp = NULL;
if (sitep) *sitep = NULL;
p = strchr(raw, '\n');
if (!p) {
errno = EBADMSG;
goto fail;
}
*p++ = '\0';
if (methodp) {
*methodp = malloc(strlen(raw) + 1U);
if (!*methodp)
goto fail;
strcpy(*methodp, raw);
}
if (site && *(q = &strchr(p, '\0')[-1])) {
if (*q != '\n') {
errno = EBADMSG;
goto fail;
}
*q = '\0';
*sitep = malloc(strlen(p) + 1U);
if (!*sitep)
goto fail;
strcpy(*sitep, p);
}
free(raw);
return 0;
fail:
saved_errno = errno;
if (methodp) {
free(*methodp);
*methodp = NULL;
}
free(raw);
errno = saved_errno;
return -1;
}
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