minix3/lib/libc/gen/gethostname.c

32 lines
563 B
C

/* gethostname(2) system call emulation */
#include <sys/cdefs.h>
#include "namespace.h"
#include <sys/types.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <minix/paths.h>
#ifdef __weak_alias
__weak_alias(gethostname, _gethostname)
#endif
int gethostname(char *buf, size_t len)
{
int fd;
int r;
char *nl;
if ((fd= open(_PATH_HOSTNAME_FILE, O_RDONLY)) < 0) return -1;
r= read(fd, buf, len);
close(fd);
if (r == -1) return -1;
buf[len-1]= '\0';
if ((nl= strchr(buf, '\n')) != NULL) *nl= '\0';
return 0;
}