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Full Discussion: Command line buffer limit?
Top Forums UNIX for Dummies Questions & Answers Command line buffer limit? Post 33487 by RTM on Tuesday 7th of January 2003 09:37:54 AM
Old 01-07-2003
Thanks Perderabo. I did two different commands (one to create a directory which I realized may have been a problem other than the 'limit' on command line) but both errored by beeping constantly and giving an error in the middle of the line.

On one, it cut a grep command and came back with "command not found" for "rep" and the other died along the same line (same number of characters).

cat passwd | grep h | grep o | grep m | grep e | grep a | grep i | grep o | grep 8 | grep 1 | grep 3 | grep 2 | grep 9 | grep "-" | grep S | grep b | grep l | grep t | grep L | grep 4 | grep d | grep r | grep 0 | grep V | grep I | grep abal | grep k | grep and | grep ers | grep eit | grep N | grep z | grep w | grep g | grep N
$ V | grep I | grep abal | grep k | grep <
usage: grep [-E|-F] [-c|-l|-q] [-bhinsvx] -e pattern_list...
[-f pattern_file...] [file...]
usage: grep [-E|-F] [-c|-l|-q] [-bhinsvx] [-e pattern_list...]
-f pattern_file... [file...]
usage: grep [-E|-F] [-c|-l|-q] [-bhinsvx] pattern [file...]

Note that when hitting return, it errors and gives back a prompt and includes the rest of the line as a start of a new command ($ V | grep 1 ....).

This is probably some other parameter set differently from one system to the next (or possibly shell) but I figured I would ask about it. I can also get the same response on Solaris even though I found some indication that the same information you suggested was true for it too. Ksh on HP and csh on Solaris. And for some reason I get a few more characters (about 40 ) on Solaris. The whole thing is strange and inconsistant.
 

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line(1) 						      General Commands Manual							   line(1)

NAME
line - read one line from user input SYNOPSIS
timeout] DESCRIPTION
copies one line (up to a new-line) from the standard input and writes it on the standard output. It returns an exit code of 1 on EOF and always prints at least a new-line. It is often used within shell files to read from the user's terminal. Options recognizes the following command-line option: Timeout after timeout seconds where timeout is an integer value (if a non-integer value is specified, it is converted to an integer; i.e., rounded down). A blank is required between and the timeout argument. This option is not documented in POSIX and other industry standards, and should not be used in portable applications. EXTERNAL INFLUENCES
International Code Set Support Single- and multi-byte character code sets are supported. EXAMPLES
The following lines in a shell script prompt for a file name and display information about the file: To limit the response time to 10 seconds, use the form: then test for no response. If no response occurs before timeout expires, a default behavior should be provided. WARNINGS
This command is likely to be withdrawn from X/Open standards. Applications using this command might not be portable to other vendors' sys- tems. As an alternative is recommended. SEE ALSO
sh(1), read(2). STANDARDS CONFORMANCE
line(1)
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