/* env.c - Set the environment for command invocation. * * Copyright 2012 Tryn Mirell <tryn@mirell.org> * * http://opengroup.org/onlinepubs/9699919799/utilities/env.html * * Deviations from posix: "-" argument and -0 USE_ENV(NEWTOY(env, "^0iu*", TOYFLAG_USR|TOYFLAG_BIN)) config ENV bool "env" default y help usage: env [-i] [-u NAME] [NAME=VALUE...] [command [option...]] Set the environment for command invocation, or list environment variables. -i Clear existing environment -u NAME Remove NAME from the environment -0 Use null instead of newline in output */ #define FOR_env #include "toys.h" GLOBALS( struct arg_list *u; ); extern char **environ; void env_main(void) { char **ev = toys.optargs; // If first nonoption argument is "-" treat it as -i if (*ev && **ev == '-' && !(*ev)[1]) { toys.optflags |= FLAG_i; ev++; } if (toys.optflags & FLAG_i) clearenv(); while (TT.u) { unsetenv(TT.u->arg); TT.u = TT.u->next; } for (; *ev; ev++) { char *name = *ev, *val = strchr(name, '='); if (val) { *(val++) = 0; setenv(name, val, 1); } else xexec(ev); } if (environ) for (ev = environ; *ev; ev++) xprintf("%s%c", *ev, '\n'*!(toys.optflags&FLAG_0)); }