# tee.awk --- tee in awk
#
# Copy standard input to all named output files.
# Append content if -a option is supplied.
#
# Arnold Robbins, [email protected], 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])
}