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55 lines
1.2 KiB
55 lines
1.2 KiB
7 months ago
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/* env.c - Set the environment for command invocation.
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*
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* Copyright 2012 Tryn Mirell <tryn@mirell.org>
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*
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* http://opengroup.org/onlinepubs/9699919799/utilities/env.html
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*
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* Deviations from posix: "-" argument and -0
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USE_ENV(NEWTOY(env, "^i0u*", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_ARGFAIL(125)))
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config ENV
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bool "env"
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default y
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help
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usage: env [-i] [-u NAME] [NAME=VALUE...] [COMMAND...]
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Set the environment for command invocation, or list environment variables.
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-i Clear existing environment
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-u NAME Remove NAME from the environment
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-0 Use null instead of newline in output
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*/
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#define FOR_env
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#include "toys.h"
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GLOBALS(
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struct arg_list *u;
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)
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void env_main(void)
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{
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char **ev = toys.optargs;
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struct arg_list *u;
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// If first nonoption argument is "-" treat it as -i
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if (*ev && **ev == '-' && !(*ev)[1]) {
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toys.optflags |= FLAG_i;
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ev++;
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}
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if (FLAG(i)) xclearenv();
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else for (u = TT.u; u; u = u->next) xunsetenv(u->arg);
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for (; *ev; ev++)
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if (strchr(*ev, '=')) xsetenv(xstrdup(*ev), 0);
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else {
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// a common use of env is to bypass shell builtins
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toys.stacktop = 0;
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xexec(ev);
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}
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for (ev = environ; *ev; ev++) xprintf("%s%c", *ev, '\n'*!FLAG(0));
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}
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