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authorGravatar Mike Frysinger <vapier@gentoo.org>2005-04-21 23:23:13 +0000
committerGravatar Mike Frysinger <vapier@gentoo.org>2005-04-21 23:23:13 +0000
commit6d1d2e59bff295c5876430a6289425118f02e0ee (patch)
treecfe9de6c7905a797c162de4da229246696ac120d /coreutils/printenv.c
parentc0bc9652fd8aaa0283249f66b0971bd3139c9116 (diff)
downloadbusybox-6d1d2e59bff295c5876430a6289425118f02e0ee.tar.gz
busybox-6d1d2e59bff295c5876430a6289425118f02e0ee.tar.bz2
add a printenv implementation
Diffstat (limited to 'coreutils/printenv.c')
-rw-r--r--coreutils/printenv.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/coreutils/printenv.c b/coreutils/printenv.c
new file mode 100644
index 000000000..10f9dd22a
--- /dev/null
+++ b/coreutils/printenv.c
@@ -0,0 +1,52 @@
+/*
+ * printenv implementation for busybox
+ *
+ * Copyright (C) 2005 by Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 2005 by Mike Frysinger <vapier@gentoo.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+int printenv_main(int argc, char **argv)
+{
+ extern char **environ;
+ int e = 0;
+
+ /* no variables specified, show whole env */
+ if (argc == 1)
+ while (environ[e])
+ puts(environ[e++]);
+
+ /* search for specified variables and print them out if found */
+ else {
+ int i;
+ size_t l;
+ char *arg, *env;
+
+ for (i=1; (arg = argv[i]); ++i)
+ for (; (env = environ[e]); ++e) {
+ l = strlen(arg);
+ if (!strncmp(env, arg, l) && env[l] == '=')
+ puts(env + l + 1);
+ }
+ }
+
+ exit(EXIT_SUCCESS);
+}