37 lines
815 B
C
37 lines
815 B
C
/**
|
|
* @brief hostname - Prints or sets the system hostname.
|
|
*
|
|
* @copyright
|
|
* This file is part of ToaruOS and is released under the terms
|
|
* of the NCSA / University of Illinois License - see LICENSE.md
|
|
* Copyright (C) 2013-2018 K. Lange
|
|
*/
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
|
|
int main(int argc, char * argv[]) {
|
|
if ((argc > 1 && argv[1][0] == '-') || (argc < 2)) {
|
|
char tmp[256] = {0};
|
|
gethostname(tmp, 255);
|
|
printf("%s\n", tmp);
|
|
return 0;
|
|
} else {
|
|
if (geteuid() != 0) {
|
|
fprintf(stderr,"Must be root to set hostname.\n");
|
|
return 1;
|
|
} else {
|
|
sethostname(argv[1], strlen(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;
|
|
}
|