1 /* 2 * Haiku Command line apps 3 * logname.c 4 * Larry Cow <larrycow@free.fr> 5 */ 6 7 #include <stdlib.h> 8 #include <stdio.h> 9 #include <string.h> 10 11 #define DEFAULT_USER "baron" 12 13 #define HELP_TIP "Try '%s --help' for more information.\n" 14 15 #define HELP_MESSAGE "Usage: /bin/logname [OPTION]... 16 Print the name of the current 17 18 --help\t display this help and exit 19 --version\t output version information and exit 20 21 Reports bugs to <larrycow@free.fr>." 22 23 #define VERSION_MESSAGE "logname (OBOS) 1.0 24 Written by Larry Cow 25 26 Coded by Larry Cow 2002 27 Released under the MIT license with Haiku." 28 29 void dispatch_args(char* av0, char* av1) 30 { 31 if (!strcmp(av1, "--help")) 32 { 33 puts(HELP_MESSAGE); 34 return; 35 } 36 if (!strcmp(av1, "--version")) 37 { 38 puts(VERSION_MESSAGE); 39 return; 40 } 41 printf(HELP_TIP, av0); 42 } 43 44 int main(int argc, char* argv[]) 45 { 46 if (argc > 1) 47 dispatch_args(argv[0], argv[1]); 48 else 49 { 50 char* user = getenv("USER"); 51 if (user == NULL) 52 puts(DEFAULT_USER); 53 else 54 puts(user); 55 } 56 return 0; 57 } 58