07955c83c6
* Finally bring syscall.h up to speed and include all syscalls in the syscall module of the C library. * Remove the third-party obfuscated C demos (we have nyancat, good enough) * Fix userspace apps to build without complaining about undeclared strtok_r by disable __STRICT_ANSI__ * Fix .eh_frame by including the proper stuff with libgcc.
36 lines
638 B
C
36 lines
638 B
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
|
|
*
|
|
* hostname
|
|
*
|
|
* Prints or sets the system hostname.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <syscall.h>
|
|
|
|
#define ROOT_UID 0
|
|
|
|
int main(int argc, char * argv[]) {
|
|
if (argc < 2) {
|
|
char tmp[256];
|
|
syscall_gethostname(tmp);
|
|
printf("%s\n", tmp);
|
|
return 0;
|
|
} else {
|
|
if (syscall_getuid() != ROOT_UID) {
|
|
fprintf(stderr,"Must be root to set hostname.\n");
|
|
return 1;
|
|
} else {
|
|
syscall_sethostname(argv[1]);
|
|
FILE * file = fopen("/etc/hostname", "w");
|
|
if (!file) {
|
|
return 1;
|
|
} else {
|
|
fprintf(file, "%s\n", argv[1]);
|
|
fclose(file);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|