119 lines
2.4 KiB
C
119 lines
2.4 KiB
C
/* 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) 2018 K. Lange
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*/
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/* vim: tabstop=4 shiftwidth=4 noexpandtab
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*
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* uname
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*
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* Prints the kernel version information.
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*/
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#include <stdio.h>
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#include <syscall.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/utsname.h>
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#define FLAG_SYSNAME 0x01
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#define FLAG_NODENAME 0x02
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#define FLAG_RELEASE 0x04
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#define FLAG_VERSION 0x08
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#define FLAG_MACHINE 0x10
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#define FLAG_ALL (FLAG_SYSNAME|FLAG_NODENAME|FLAG_RELEASE|FLAG_VERSION|FLAG_MACHINE)
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#define _ITALIC "\033[3m"
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#define _END "\033[0m\n"
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void show_usage(int argc, char * argv[]) {
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fprintf(stderr,
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"uname - Print system version information.\n"
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"\n"
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"usage: %s [-asnrvm]\n"
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"\n"
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" -a " _ITALIC "Print the standard uname string we all love" _END
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" -s " _ITALIC "Print kernel name" _END
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" -n " _ITALIC "Print system name" _END
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" -r " _ITALIC "Print kernel version number" _END
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" -v " _ITALIC "Print the extra kernel version information" _END
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" -m " _ITALIC "Print the architecture name" _END
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"\n", argv[0]);
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exit(1);
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}
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int main(int argc, char * argv[]) {
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struct utsname u;
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int flags = 0;
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int space = 0;
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for (int i = 1; i < argc; ++i) {
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if (argv[i][0] == '-') {
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char *c = &argv[i][1];
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while (*c) {
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switch (*c) {
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case 'a':
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flags |= FLAG_ALL;
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break;
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case 's':
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flags |= FLAG_SYSNAME;
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break;
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case 'n':
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flags |= FLAG_NODENAME;
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break;
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case 'r':
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flags |= FLAG_RELEASE;
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break;
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case 'v':
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flags |= FLAG_VERSION;
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break;
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case 'm':
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flags |= FLAG_MACHINE;
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break;
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case 'h':
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default:
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show_usage(argc, argv);
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break;
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}
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c++;
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}
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}
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}
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uname(&u);
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if (!flags) {
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/* By default, we just print the kernel name */
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flags = FLAG_SYSNAME;
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}
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if (flags & FLAG_SYSNAME) {
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if (space++) printf(" ");
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printf("%s", u.sysname);
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}
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if (flags & FLAG_NODENAME) {
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if (space++) printf(" ");
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printf("%s", u.nodename);
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}
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if (flags & FLAG_RELEASE) {
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if (space++) printf(" ");
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printf("%s", u.release);
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}
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if (flags & FLAG_VERSION) {
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if (space++) printf(" ");
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printf("%s", u.version);
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}
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if (flags & FLAG_MACHINE) {
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if (space++) printf(" ");
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printf("%s", u.machine);
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}
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printf("\n");
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return 0;
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}
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