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authorEric Andersen <andersen@codepoet.org>2002-08-07 13:13:40 +0000
committerEric Andersen <andersen@codepoet.org>2002-08-07 13:13:40 +0000
commit9a1a89e45461cb586f4aaf9a2e3585d870f189e3 (patch)
treee737ff7a343ec5e16d55e7884ab00aa4e7aa606d /libc/stdlib
parent560dd2f77a152c0fd7639ba7ac81cd698c84e65a (diff)
Changed my mind. Keep this separate.
-Erik
Diffstat (limited to 'libc/stdlib')
-rw-r--r--libc/stdlib/getenv.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/libc/stdlib/getenv.c b/libc/stdlib/getenv.c
new file mode 100644
index 000000000..2daf03955
--- /dev/null
+++ b/libc/stdlib/getenv.c
@@ -0,0 +1,41 @@
+/* getenv.c for uClibc
+ Erik Andersen <andersen@codepoet.org>
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA.
+ */
+
+#include <string.h>
+#include <unistd.h>
+
+/* IEEE Std 1003.1-2001 says getenv need not be thread safe, so
+ * don't bother locking access to __environ */
+char *getenv(const char *var)
+{
+ int len;
+ char **ep;
+
+ if (!(ep=__environ))
+ return NULL;
+ len = strlen(var);
+ while(*ep) {
+ if (memcmp(var, *ep, len) == 0 && (*ep)[len] == '=') {
+ return *ep + len + 1;
+ }
+ ep++;
+ }
+ return NULL;
+}
+