/* *  xreadlink.c - safe implementation of readlink. *  Returns a NULL on failure... */#include <stdio.h>/* * NOTE: This function returns a malloced char* that you will have to free * yourself. You have been warned. */#include <unistd.h>#include "libbb.h"extern char *xreadlink(const char *path){                       	static const int GROWBY = 80; /* how large we will grow strings by */	char *buf = NULL;   	int bufsize = 0, readsize = 0;	do {		buf = xrealloc(buf, bufsize += GROWBY);		readsize = readlink(path, buf, bufsize); /* 1st try */		if (readsize == -1) {		    perror_msg("%s:%s", applet_name, path);		    return NULL;		}	}           	while (bufsize < readsize + 1);	buf[readsize] = '\0';	return buf;}