Import sources from 2011-03-30 iso image

1 files changed, 36 insertions, 0 deletions

diff --git a/sys/src/libc/9sys/getenv.c b/sys/src/libc/9sys/getenv.c
new file mode 100755
index 000000000..146b35b62
--- /dev/null
+++ b/sys/src/libc/9sys/getenv.c
@@ -0,0 +1,36 @@
+#include <u.h>
+#include <libc.h>
+
+char*
+getenv(char *name)
+{
+	int r, f;
+	long s;
+	char *ans;
+	char *p, *ep, ename[100];
+
+	if(strchr(name, '/') != nil)
+		return nil;
+	snprint(ename, sizeof ename, "/env/%s", name);
+	if(strcmp(ename+5, name) != 0)
+		return nil;
+	f = open(ename, OREAD);
+	if(f < 0)
+		return 0;
+	s = seek(f, 0, 2);
+	ans = malloc(s+1);
+	if(ans) {
+		setmalloctag(ans, getcallerpc(&name));
+		seek(f, 0, 0);
+		r = read(f, ans, s);
+		if(r >= 0) {
+			ep = ans + s - 1;
+			for(p = ans; p < ep; p++)
+				if(*p == '\0')
+					*p = ' ';
+			ans[s] = '\0';
+		}
+	}
+	close(f);
+	return ans;
+}