28 lines
489 B
C
28 lines
489 B
C
/* gethostname(2) system call emulation */
|
|
|
|
#include <sys/types.h>
|
|
#include <fcntl.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <net/gen/netdb.h>
|
|
|
|
#define HOSTNAME_FILE "/etc/hostname.file"
|
|
|
|
int gethostname(char *buf, size_t len)
|
|
{
|
|
int fd;
|
|
int r;
|
|
char *nl;
|
|
|
|
if ((fd= open(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;
|
|
}
|