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- /* env.c - Set the environment for command invocation.
- *
- * Copyright 2012 Tryn Mirell <tryn@mirell.org>
- *
- * http://opengroup.org/onlinepubs/9699919799/utilities/env.html
- *
- * Note: env bypasses shell builtins, so don't xexec().
- *
- * Deviations from posix: "-" argument and -0
- USE_ENV(NEWTOY(env, "^i0u*", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_ARGFAIL(125)))
- config ENV
- bool "env"
- default y
- help
- usage: env [-i] [-u NAME] [NAME=VALUE...] [COMMAND...]
- 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;
- )
- void env_main(void)
- {
- char **ev = toys.optargs, **ee = 0, **set QUIET, *path = getenv("PATH");
- struct string_list *sl = 0;
- struct arg_list *u;
- // If first nonoption argument is "-" treat it as -i
- if (*ev && **ev == '-' && !(*ev)[1]) {
- toys.optflags |= FLAG_i;
- ev++;
- }
- if (FLAG(i)) ee = set = xzalloc(sizeof(void *)*(toys.optc+1));
- else for (u = TT.u; u; u = u->next) xunsetenv(u->arg);
- for (; *ev; ev++) {
- if (strchr(*ev, '=')) {
- if (FLAG(i)) *set++ = *ev;
- else xsetenv(xstrdup(*ev), 0);
- if (!strncmp(*ev, "PATH=", 5)) path=(*ev)+5;
- } else {
- // unfortunately, posix has no exec combining p and e, so do p ourselves
- if (!strchr(*ev, '/') && path) {
- errno = ENOENT;
- for (sl = find_in_path(path, *ev); sl; sl = sl->next)
- execve(sl->str, ev, ee ? : environ);
- } else execve(*ev, ev, ee ? : environ);
- perror_msg("exec %s", *ev);
- _exit(126+(errno == ENOENT));
- }
- }
- for (ev = ee ? : environ; *ev; ev++) xprintf("%s%c", *ev, '\n'*!FLAG(0));
- }
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