#include <stddef.h>#include <stdio.h>#include <errno.h>#include <stdlib.h>#include <string.h>#include <sys/stat.h>#include <libgen.h>  static int mkpath(const char *s, mode_t mode){    char *q, *r = NULL, *path = NULL, *up = NULL;    int rv;     rv = -1;    if (strcmp(s, ".") == 0 || strcmp(s, "/") == 0)        return (0);     if ((path = strdup(s)) == NULL)        exit(1);     if ((q = strdup(s)) == NULL)        exit(1);     if ((r = dirname(q)) == NULL)        goto out;     if ((up = strdup(r)) == NULL)        exit(1);     if ((mkpath(up, mode) == -1) && (errno != EEXIST))        goto out;     if ((mkdir(path, mode) == -1) && (errno != EEXIST))        rv = -1;    else        rv = 0;  out:    if (up != NULL)        free(up);    free(q);    free(path);    return (rv);} static int mksocketpath(const char *s){    char * tmp=malloc(strlen(s));    strcpy(tmp,s);    int r=mkpath(dirname(tmp),S_IRWXU|S_IRWXG);    free(tmp);    return r;} static ubus_channel * ubus_client_add(ubus_service * service, ubus_channel * c){    c->next=NULL;    c->prev=NULL;    if(service->chanlist==NULL){        service->chanlist=c;        return c;    }    ubus_channel * cur=service->chanlist;    while(cur){        if(cur->next==NULL){            cur->next=c;            c->prev=cur;            return c;        }        cur=cur->next;    }    fprintf(stderr,"corrupted linked list");    abort();}static ubus_channel *  ubus_client_del(ubus_service * service, ubus_channel  * c){    if(service!=c->service){        fprintf(stderr,"eerr ... trying to delete channel from foreign service. something broke.");        abort();    }    ubus_channel * n= c->next;    if(c->prev==NULL){        if(c!=service->chanlist){            fprintf(stderr,"corrupted linked list");            abort();        }        service->chanlist=0;    }else{        c->prev->next=c->next;    }    c->service=0;    ubus_disconnect(c);    return n;}