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Full Discussion: Memory/virtual space
Top Forums Shell Programming and Scripting Memory/virtual space Post 10781 by degwright on Wednesday 21st of November 2001 02:28:02 AM
Old 11-21-2001
Question LINE_MAX (limits)
Perderabo,
Thanks for the reply. I have obviously missed the point somewhere. The LINE_MAX setting here is 2048 chars. How does this figure relate to the 12,000 chars (plus cr's, linefeeds) that appears to be the restriction.
Below are some positive and negative examples. The closest wc value I have achieved so far is 11,810 (without a failure) and I know it fails when it hits 12,044.
Does your reply still stand, or have I missed something.
Unfortunately, source .c/.h filenames being what they are, can only be picked up by using the filename extension. Developers tend not select alphabetically ordered filenames, otherwise I would use a*.c etc.


Rgds David


ok
wright@w9054$ ls projects/$PROJECTPATH/*.[ch].met | wc
272 272 7840
wright@w9054$ pwd
/home/w9061disk/wright
----------------------------
ok
wright@w9054$ ls $PROJECTPATH/*.[ch].met | wc
272 272 7840
wright@w9054$ pwd
/home/w9061disk/wright
----------------------------
ok
wright@w9054$ PROJECTPATH=wright/projects/a318 ; export PROJECTPATH
wright@w9054$ ls $PROJECTPATH/*.[ch].met | wc
272 272 9744
wright@w9054$ pwd
/home/w9061disk
----------------------------
NICHT WAR
wright@w9054$ PROJECTPATH=w9061disk/wright/projects/a318 ; export PROJECTPATH
wright@w9054$ ls $PROJECTPATH/*.[ch].met | wc
/usr/bin/ksh: /usr/bin/ls: arg list too long
0 0 0
wright@w9054$ pwd
/home
wright@w9054$
------------------------------------------------------------------
OK
wright@w9054$ cd w9061disk/
wright@w9054$ PROJECTPATH=wright/projects/a318 ; export PROJECTPATH
wright@w9054$ ls $PROJECTPATH/*.[ch].met | wc
272 272 9744
wright@w9054$ pwd
/home/w9061disk
wright@w9054$
-----------------------------------
NICHT WAR
wright@w9054$ ls w9061disk/wright/projects/a318/*.[ch].met | wc
/usr/bin/ksh: /usr/bin/ls: arg list too long
0 0 0
 

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LEARN ABOUT SUNOS

endusershell

getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME

       getusershell, setusershell, endusershell - get legal user shells

SYNOPSIS

       #include <unistd.h>

       char *getusershell(void);

       void setusershell(void);

       void endusershell(void);

DESCRIPTION

       The  getusershell()  function  returns  a  pointer  to  a  legal  user  shell  as defined by the system manager in the file /etc/shells. If
       /etc/shells does not exist, the following locations of the standard system shells are used in its place:

       /bin/bash		  /bin/csh
       /bin/jsh 		  /bin/ksh
       /bin/pfcsh		  /bin/pfksh
       /bin/pfsh		  /bin/sh
       /bin/tcsh		  /bin/zsh
       /sbin/jsh		  /sbin/pfsh
       /sbin/sh 		  /usr/bin/bash
       /usr/bin/csh		  /usr/bin/jsh
       /usr/bin/ksh		  /usr/bin/pfcsh
       /usr/bin/pfksh		  /usr/bin/pfsh
       /usr/bin/sh		  /usr/bin/tcsh
       /usr/bin/zsh		  /usr/xpg4/bin/sh

       The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells.

       The setusershell() function rewinds the file or the list.

       The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells.

RETURN VALUES

       The getusershell() function returns a null pointer on EOF.

BUGS

       All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved.

SunOS 5.10							    30 Aug 2004 						  getusershell(3C)
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