| 1 | #define _GNU_SOURCE |
| 2 | #include <unistd.h> |
| 3 | #include <sys/utsname.h> |
| 4 | #include <string.h> |
| 5 | #include <errno.h> |
| 6 | |
| 7 | int getdomainname(char *name, size_t len) |
| 8 | { |
| 9 | struct utsname temp; |
| 10 | uname(&temp); |
| 11 | if (!len || strlen(temp.domainname) >= len) { |
| 12 | errno = EINVAL; |
| 13 | return -1; |
| 14 | } |
| 15 | strcpy(name, temp.domainname); |
| 16 | return 0; |
| 17 | } |