From 2790105914ea20aaa26d71899be1f12422270349 Mon Sep 17 00:00:00 2001 From: Georgi Chorbadzhiyski Date: Sat, 3 Mar 2012 23:55:27 -0600 Subject: Implement printenv command. --- toys/printenv.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 toys/printenv.c (limited to 'toys/printenv.c') diff --git a/toys/printenv.c b/toys/printenv.c new file mode 100644 index 00000000..da75acdf --- /dev/null +++ b/toys/printenv.c @@ -0,0 +1,45 @@ +/* vi: set sw=4 ts=4: + * + * printenv.c - Print environment variables. + * + * Copyright 2012 Georgi Chorbadzhiyski + * + +USE_PRINTENV(NEWTOY(printenv, "0", TOYFLAG_USR|TOYFLAG_BIN)) + +config PRINTENV + bool "printenv" + default y + help + usage: printenv [-0] [env_var...] + Print enviroment variables. + + -0 Use \0 as environment delimiter instead of \n +*/ + +#include "toys.h" + +extern char **environ; + +void printenv_main(void) +{ + char **env; + char delim = '\n'; + + if (toys.optflags) + delim = '\0'; + + if (!toys.optargs[0]) { + for (env = environ; *env; env++) + xprintf("%s%c", *env, delim); + } else { + char **var = toys.optargs; + for (var = toys.optargs; *var; var++) { + int len = strlen(*var); + for (env = environ; *env; env++) { + if (strncmp(*env, *var, len) == 0) + xprintf("%s%c", *env + len + 1, delim); + } + } + } +} -- cgit v1.2.3