1 files changed, 38 insertions, 0 deletions
diff --git a/awklib/eg/prog/tee.awk b/awklib/eg/prog/tee.awk
new file mode 100644
index 00000000..895e4398
--- /dev/null
+++ b/awklib/eg/prog/tee.awk
@@ -0,0 +1,38 @@
+# tee.awk --- tee in awk
+# Arnold Robbins, arnold@gnu.ai.mit.edu, Public Domain
+# May 1993
+# Revised December 1995
+
+BEGIN    \
+{
+    for (i = 1; i < ARGC; i++)
+        copy[i] = ARGV[i]
+
+    if (ARGV[1] == "-a") {
+        append = 1
+        delete ARGV[1]
+        delete copy[1]
+        ARGC--
+    }
+    if (ARGC < 2) {
+        print "usage: tee [-a] file ..." > "/dev/stderr"
+        exit 1
+    }
+    ARGV[1] = "-"
+    ARGC = 2
+}
+{
+    # moving the if outside the loop makes it run faster
+    if (append)
+        for (i in copy)
+            print >> copy[i]
+    else
+        for (i in copy)
+            print > copy[i]
+    print
+}
+END    \
+{
+    for (i in copy)
+        close(copy[i])
+}