what is the maximum length of th os-command line in Unix.

kumardesai · #1 (**permalink**) 11-28-2007

Hi All,

I didn't find any thread that match this question so I hope it's not redundant. I am totally new to Unix. I want to know what is the maximum length of the os-commandline in Unix. Will it cause any problem if I run any application whose total path length is much longer than 256 characters.

Thanks in Advance,

Regards ,
Kumar

porter · #2 (**permalink**) 11-28-2007

You are asking two things there...

1. maximum length of a command line, this is OS dependent but it is in the order of thousands of characters.

2. maximum length of a file path, typically 1024 characters, look for FILENAME_MAX in a header in /usr/include

vgersh99 · #3 (**permalink**) 11-28-2007

Code:

#!/bin/ksh

cpp <<HERE | tail -1
#include <limits.h>
ARG_MAX
HERE

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