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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
*
* Deviations from posix: "-" argument and -0
USE_ENV(NEWTOY(env, "^0iu*", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_ARGFAIL(125)))
config ENV
bool "env"
default y
help
usage: env [-i] [-u NAME] [NAME=VALUE...] [COMMAND [ARG...]]
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;
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)) xclearenv();
else for (u = TT.u; u; u = u->next) xunsetenv(u->arg);
for (; *ev; ev++)
if (strchr(*ev, '=')) xsetenv(xstrdup(*ev), 0);
else {
// a common use of env is to bypass shell builtins
toys.stacktop = 0;
xexec(ev);
}
for (ev = environ; *ev; ev++) xprintf("%s%c", *ev, '\n'*!FLAG(0));
}
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