#include <unistd.h> #include <sys/utsname.h> #include <string.h> int gethostname(char *name, size_t len) { size_t i; struct utsname uts; if (uname(&uts)) return -1; if (len > sizeof uts.nodename) len = sizeof uts.nodename; for (i=0; i<len && (name[i] = uts.nodename[i]); i++); if (i==len) name[i-1] = 0; return 0; }