40 lines
847 B
C
40 lines
847 B
C
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/* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2013-2014 Kevin Lange
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*/
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/* vim: tabstop=4 shiftwidth=4 noexpandtab
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*
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* hostname
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*
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* Prints or sets the system hostname.
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*/
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#include <stdio.h>
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#include <syscall.h>
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#define ROOT_UID 0
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int main(int argc, char * argv[]) {
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if ((argc > 1 && argv[1][0] == '-') || (argc < 2)) {
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char tmp[256];
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syscall_gethostname(tmp);
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printf("%s\n", tmp);
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return 0;
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} else {
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if (syscall_getuid() != ROOT_UID) {
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fprintf(stderr,"Must be root to set hostname.\n");
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return 1;
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} else {
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syscall_sethostname(argv[1]);
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FILE * file = fopen("/etc/hostname", "w");
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if (!file) {
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return 1;
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} else {
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fprintf(file, "%s\n", argv[1]);
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fclose(file);
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return 0;
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}
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}
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}
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return 0;
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}
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