Mercurial > hg > toybox
view toys/posix/env.c @ 1048:e3ebec880fe6 draft
env - there were 2 segfaults when run on my Ubuntu 12.04 machine:
- one is because eglibc sets environ to NULL on clearenv(). I added check for environ being not NULL when iterating over environment variables
- switched xexec to xexec_optargs because command argument is a pointer to optarg which is freed by xexec.
author | Jacek Bukarewicz <j.bukarewicz@samsung.com> |
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date | Thu, 05 Sep 2013 04:58:06 -0500 |
parents | 786841fdb1e0 |
children | 49c851da3658 |
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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 USE_ENV(NEWTOY(env, "^i", TOYFLAG_USR|TOYFLAG_BIN)) config ENV bool "env" default y help usage: env [-i] [NAME=VALUE...] [command [option...]] Set the environment for command invocation. -i Clear existing environment. */ #include "toys.h" extern char **environ; void env_main(void) { char **ev; char **command = NULL; char *del = "="; if (toys.optflags) clearenv(); for (ev = toys.optargs; *ev != NULL; ev++) { char *env, *val = NULL; env = strtok(*ev, del); if (env) val = strtok(NULL, del); if (val) setenv(env, val, 1); else { command = ev; break; } } if (!command) { char **ep; if (environ) for (ep = environ; *ep; ep++) xputs(*ep); } else xexec_optargs(command - toys.optargs); }