argv0
Section: User Commands (1)
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NAME
argv0 - runs a program with a specified 0th argument.
SYNOPSIS
argv0
realname
zero
args
DESCRIPTION
realname
is one argument.
zero
is one argument.
args
is any number of arguments.
argv0
runs the program stored as
realname
on disk, with
zero
as the 0th argument (rather than
realname)
and
args
as the remaining arguments.
APPLICATIONS
Some programs pay special attention to the 0th argument.
argv0
makes these programs usable from shell scripts.
For example,
-
argv0 /bin/csh -csh
runs /bin/csh with a 0th argument of -csh. /bin/csh will think it is a login
shell and behave accordingly.
As another example, the command
-
tcpserver 0 ftp argv0 tcpd ftpd -l -A
has a similar effect to the line
-
ftp stream tcp nowait root tcpd ftpd -l -A
in /etc/inetd.conf. The tcpd program is run with 0th argument ftpd and
remaining arguments -l -A. Note that tcpd can and should be replaced by the
-x
option of
tcpserver(1):
-
tcpserver -x ftp.tcp 0 ftp ftpd -l -A
SEE ALSO
tcpserver(1),
tcprules(1),
tcprulescheck(1),
fixcrio(1),
recordio(1),
rblsmtpd(1),
tcpclient(1),
who@(1),
date@(1),
finger@(1),
http@(1),
tcpcat(1),
mconnect(1),
tcp-environ(5)
http://cr.yp.to/ucspi-tcp.html