38 lines
823 B
C
38 lines
823 B
C
/* vim: ts=4 sw=4 noexpandtab
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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) 2013-2018 K. Lange
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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 <unistd.h>
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#include <string.h>
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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] = {0};
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gethostname(tmp, 255);
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printf("%s\n", tmp);
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return 0;
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} else {
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if (getuid() != 0) {
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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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sethostname(argv[1], strlen(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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