/* This file is part of ToaruOS and is released under the terms * of the NCSA / University of Illinois License - see LICENSE.md * Copyright (C) 2018 K. Lange */ /* vim: tabstop=4 shiftwidth=4 noexpandtab * * uname * * Prints the kernel version information. */ #include #include #include #include #include #define FLAG_SYSNAME 0x01 #define FLAG_NODENAME 0x02 #define FLAG_RELEASE 0x04 #define FLAG_VERSION 0x08 #define FLAG_MACHINE 0x10 #define FLAG_ALL (FLAG_SYSNAME|FLAG_NODENAME|FLAG_RELEASE|FLAG_VERSION|FLAG_MACHINE) #define _ITALIC "\033[3m" #define _END "\033[0m\n" void show_usage(int argc, char * argv[]) { fprintf(stderr, "uname - Print system version information.\n" "\n" "usage: %s [-asnrvm]\n" "\n" " -a " _ITALIC "Print the standard uname string we all love" _END " -s " _ITALIC "Print kernel name" _END " -n " _ITALIC "Print system name" _END " -r " _ITALIC "Print kernel version number" _END " -v " _ITALIC "Print the extra kernel version information" _END " -m " _ITALIC "Print the architecture name" _END "\n", argv[0]); exit(1); } int main(int argc, char * argv[]) { struct utsname u; int flags = 0; int space = 0; for (int i = 1; i < argc; ++i) { if (argv[i][0] == '-') { char *c = &argv[i][1]; while (*c) { switch (*c) { case 'a': flags |= FLAG_ALL; break; case 's': flags |= FLAG_SYSNAME; break; case 'n': flags |= FLAG_NODENAME; break; case 'r': flags |= FLAG_RELEASE; break; case 'v': flags |= FLAG_VERSION; break; case 'm': flags |= FLAG_MACHINE; break; case 'h': default: show_usage(argc, argv); break; } c++; } } } uname(&u); if (!flags) { /* By default, we just print the kernel name */ flags = FLAG_SYSNAME; } if (flags & FLAG_SYSNAME) { if (space++) printf(" "); printf("%s", u.sysname); } if (flags & FLAG_NODENAME) { if (space++) printf(" "); printf("%s", u.nodename); } if (flags & FLAG_RELEASE) { if (space++) printf(" "); printf("%s", u.release); } if (flags & FLAG_VERSION) { if (space++) printf(" "); printf("%s", u.version); } if (flags & FLAG_MACHINE) { if (space++) printf(" "); printf("%s", u.machine); } printf("\n"); return 0; }