An early proposal used the KornShell -a primary (with the same meaning), but this was changed to -e because there were concerns about the high probability of humans confusing the -a primary with the -a binary operator.
Additional information on the differences: sh-posix(1)
posix shell was largely derived from ksh88, so while ksh88 is not fully compliant, but I think there are not many differences and ksh88 is largely a superset, but obviously not completely and less than I thought.
Quote:
Originally Posted by methyl
Footnote: ksh88 is definitely not Posix compliant. Many standards have come and gone (including past failed Posix standards) since ksh88 was released. I find ksh88 to be pretty standard across multiple platforms of multiple vintages and continue to wait for a viable replacement cross-platform standard.
So I found out . This is even wrong in O'Reilly's learning the Korn Shell
About the cross-platformness: If you are willing to give up goodies like arrays, then you could use posix standard and use the posix implementations on the various platforms (/bin/sh on hpux, /usr/xpg4/bin/sh on Solaris).. At least then your scripts will work on modern implementations too). You could also standardize on ksh93 (which is available as /bin/ksh93 or /usr/dt/bin/dtksh), which is also fully POSIX compliant (and is free downloadable software anyway nowadays).
S.
---------- Post updated at 16:23 ---------- Previous update was at 15:54 ----------
So in the case of a POSIX-compliant shell you can use:
Code:
exists()
{
[ -e "$1" ]
}
in case of original version of ksh88:
Code:
exists()
{
[ -a "$1" ]
}
If you want to only test for a regular file (and not a directory for example) you could do something like this:
Code:
file_exists(){
until [ -f "$1" ] ; do
[ $# -le 1 ] && return 1
shift
done
}
I'm sure this can't be too tough, but.
I want to check the existance of file(s) by extension. There may be 0,1,N files. If any files exist, then remove them.
Thanks for any insight. (3 Replies)
I have a list of files and their directories, starting from a particular location. e.g.
temp/new/a.c
temp/new/b.c
temp/old/a.c
temp/old/older/b.c
etc.
Now I want to check the existence of all these files in the respective directories .
I am trying something like
cat "fileList" |... (4 Replies)
Hi all,
I have the following code:
if ; then echo 'folder not exist'; else echo 'folder exist'; fi
The "testing" folder is not exist in /home/batch , but thhe result is 'folder exist'. It seems that the code cannot detect that the folder "testing" not exist.
ANybody know the... (1 Reply)
Hi,
I would like to check whether all the directories exists or not. I tried the below but it gives some error. below is the excerpt from my original script
24 #Check if the required directories are exists
25 dirExists() {
26
27 if
28 then
29 echo "required... (1 Reply)
Kindly help on below script:
<<
i='find ...'
if then
echo 'File Exists'
else
echo 'File Does Not Exist'
>>
If i has some file name then it runs properly but if i has nothing ( blank value) then it throws an error. I dont exactly remember right now but error seems like:... (2 Replies)
Hi Friends,
I wrote one shell script to check the record count in two files and that will send us the notification activity if found zero record count.
What i did is I created for loop and checking the count for both of the files but what is happening is for first file has data then it's... (13 Replies)
HI Guys,
I have some 8 files with different name and extensions. I need to check if they are present in a specific folder or not and also want that script to show me which all are not present. I can write if condition for each file but from a developer perspective , i feel that is not a good... (3 Replies)
Hello,
I have a file with below content - Example
3
6
69
139
210
345
395
418
490
492
I would like the result as - Multiple of 70 or nearest number in the file less than the multiple of 70
69
139 (5 Replies)
Hello,
For our work we use several scripts to gather/combine data for use in our webshop. Untill now we did not had any problems but since a couple days we noticed some mismatches between imports.
It happened that several barcodes where matched even though it was a complete other product. Of... (19 Replies)
Hello,
I have 40 data files where the first three columns are the same (in theory) and the 4th column is different. Here is an example of three files,
file 2: A_f0_r179_pred.txt
Id Group Name E0
1 V N(,)'1 0.2904
2 V N(,)'2 0.3180
3 V N(,)'3 0.3277
4 V N(,)'4 0.3675
5 V N(,)'5 0.3456
... (8 Replies)
Discussion started by: LMHmedchem
8 Replies
LEARN ABOUT OPENSOLARIS
shells
shells(4) File Formats shells(4)NAME
shells - shell database
SYNOPSIS
/etc/shells
DESCRIPTION
The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.
A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by the routines
which search the file. Blank lines are also ignored.
The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/ksh93, /bin/pfcsh, /bin/pfksh, /bin/pfsh,
/bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/ksh93, /usr/bin/pfcsh,
/usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh, and /usr/sfw/bin/zsh. /etc/shells overrides the default list.
Invalid shells in /etc/shells could cause unexpected behavior, such as being unable to log in by way of ftp(1).
FILES
/etc/shells list of shells on system
SEE ALSO vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)SunOS 5.11 20 Nov 2007 shells(4)
10-14-2010
. This is even wrong in O'Reilly's learning the Korn Shell