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| -rw-r--r-- | libc/stdlib/getenv.c | 41 |
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; +} + |