1 /* env.c - Set the environment for command invocation. 2 * 3 * Copyright 2012 Tryn Mirell <tryn (at) mirell.org> 4 * 5 * http://opengroup.org/onlinepubs/9699919799/utilities/env.html 6 * 7 * Deviations from posix: "-" argument and -0 8 9 USE_ENV(NEWTOY(env, "^0iu*", TOYFLAG_USR|TOYFLAG_BIN)) 10 11 config ENV 12 bool "env" 13 default y 14 help 15 usage: env [-i] [-u NAME] [NAME=VALUE...] [command [option...]] 16 17 Set the environment for command invocation, or list environment variables. 18 19 -i Clear existing environment 20 -u NAME Remove NAME from the environment 21 -0 Use null instead of newline in output 22 */ 23 24 #define FOR_env 25 #include "toys.h" 26 27 GLOBALS( 28 struct arg_list *u; 29 ); 30 31 extern char **environ; 32 33 void env_main(void) 34 { 35 char **ev = toys.optargs; 36 37 // If first nonoption argument is "-" treat it as -i 38 if (*ev && **ev == '-' && !(*ev)[1]) { 39 toys.optflags |= FLAG_i; 40 ev++; 41 } 42 43 if (toys.optflags & FLAG_i) clearenv(); 44 while (TT.u) { 45 unsetenv(TT.u->arg); 46 TT.u = TT.u->next; 47 } 48 49 for (; *ev; ev++) { 50 char *name = *ev, *val = strchr(name, '='); 51 52 if (val) { 53 *(val++) = 0; 54 setenv(name, val, 1); 55 } else xexec(ev); 56 } 57 58 if (environ) for (ev = environ; *ev; ev++) 59 xprintf("%s%c", *ev, '\n'*!(toys.optflags&FLAG_0)); 60 } 61
