I ran into the following and still do not understand entirely the rationale behind this. If someone could explain why things are as they are I'd be thankful.
The following was tested on AIX 7.1 with ksh88, but i suspect that to be ubiquitous. In an installation routine i had to create a set of symbolic links. Because they might already exist i used test -e filename to test it:
This didn't work as expected because test returned 0 only if the link AND its target existed. If only the link exists but not the file referenced by it test will return 1.
A "file that exists" is IMHO covered by a link, even if this link points to a file which doesn't. I can stat() this file and do many other operations on it which can be done with a file.
I do understand that i can use "-L", which tests for a link but i would like to understand the rationale behind the behavior. Or is the POSIX documentation inconsistent here?
Hi all,
I am getting "test:argument expected" error in the following script
LOGDIR=$XXAR_TOP/log
PROGRAM_NAME=XXAR_GPS_LBFDMSGEN
..
..
..
Check_Errors()
{
sqllogfile=$1
cd ${LOGDIR}
countfile=${LOGDIR}/${PROGRAM_NAME}.tmp
echo "countfile is " $countfile >> $LOGFILE
echo... (4 Replies)
Can someone help me with a very simple query
I have the following script:
#!/bin/sh
VAR1=""
if
then
VAR1="Message"
fi
echo $VAR1
put when i run it i get the following error
test_job.sh: test: argument expected (5 Replies)
I'm newbie to coding script so i found test: argument expected when i run it. please help me
a=`df -k |awk '{print $5 }'|egrep "(100%|%)"|cut -d"%" -f1|tail -1`
if
then
df -k|egrep "(100%|%)"|awk '{print $1,$5,$6}'
else
echo "No disk capacity more than 80%"
fi
thk in advance (7 Replies)
+
test.sh: test: argument expected
#!/bin/bash
if
then
echo thennnn
else
echo elseeee
fi
why does it show this error? Clearly from debug mode, the argument is passed. I also tried if
Run on Solaris 9.
Thanks (10 Replies)
Hello folks,
I've got this script which runs perfectly when i run it manually. But when i am running it from a crontab i am getting an error saying
test argument expected.
The line from where it is coming is something like this:
if
then
do something
fi
Any idea why? (2 Replies)
Hi,
Since i am new to Unix and on suggestion on some smart guys on unix... i have decide to learn more deeply on Unix...so i was kind of playing with if statements and found this error... though i tried to correct is for hours now i couldnt find whats wrong in my loop.
if
then
... (4 Replies)
# to search a file if it exists and whether its readable or not
# if yes print its first 5 lines
echo enter the filename to be searched
read fname
if #-d $fname
then
echo file doesn exists
elif
then
echo its a directory
elif
then
cat $fname
else
echo its not readable
fi
# end of... (9 Replies)
Hello all,
I am trying to figure out why i am getting an error while executing the script...altought it seems like its work...but still get the test arguement error...any help would be appericiate...this script basically connects to any oracle db ( just have to pass db name to it)... (4 Replies)
check_build_info_table()
{
if
then
export build_info_table=`sqlplus -s sna/dbmanager <<!
set pagesize 0 heading off feedback off
SELECT DISTINCT TABLE_NAME FROM ALL_TABLES WHERE OWNER = 'XYZ' AND TABLE_NAME = 'MY_TABLE';
exit
!`
... (3 Replies)
The following example prompts are passed into the shell script.
$1 = /tmp/dir/
$2 = varies (test.txt, test1.txt, test2.txt...)
$3 = test_YYYYMMDD.txt
---------------------------------------------------------------------------
#!/bin/sh
cd $1
if ; then
if ; then
... (3 Replies)
Discussion started by: smkremer
3 Replies
LEARN ABOUT OPENSOLARIS
ln
ln(1B) SunOS/BSD Compatibility Package Commands ln(1B)NAME
ln - make hard or symbolic links to files
SYNOPSIS
/usr/ucb/ln [-fs] filename [linkname]
/usr/ucb/ln [-fs] pathname... directory
DESCRIPTION
The /usr/ucb/ln utility creates an additional directory entry, called a link, to a file or directory. Any number of links can be assigned
to a file. The number of links does not affect other file attributes such as size, protections, data, etc.
filename is the name of the original file or directory. linkname is the new name to associate with the file or filename. If linkname is
omitted, the last component of filename is used as the name of the link.
If the last argument is the name of a directory, symbolic links are made in that directory for each pathname argument; /usr/ucb/ln uses the
last component of each pathname as the name of each link in the named directory.
A hard link (the default) is a standard directory entry just like the one made when the file was created. Hard links can only be made to
existing files. Hard links cannot be made across file systems (disk partitions, mounted file systems). To remove a file, all hard links
to it must be removed, including the name by which it was first created; removing the last hard link releases the inode associated with the
file.
A symbolic link, made with the -s option, is a special directory entry that points to another named file. Symbolic links can span file sys-
tems and point to directories. In fact, you can create a symbolic link that points to a file that is currently absent from the file sys-
tem; removing the file that it points to does not affect or alter the symbolic link itself.
A symbolic link to a directory behaves differently than you might expect in certain cases. While an ls(1) on such a link displays the
files in the pointed-to directory, an `ls -l' displays information about the link itself:
example% /usr/ucb/ln -s dir link
example% ls link
file1 file2 file3 file4
example% ls -l link
lrwxrwxrwx 1 user 7 Jan 11 23:27 link -> dir
When you use cd(1) to change to a directory through a symbolic link, you wind up in the pointed-to location within the file system. This
means that the parent of the new working directory is not the parent of the symbolic link, but rather, the parent of the pointed-to direc-
tory. For instance, in the following case the final working directory is /usr and not /home/user/linktest.
example% pwd
/home/user/linktest
example% /usr/ucb/ln -s /var/tmp symlink
example% cd symlink
example% cd ..
example% pwd
/usr
C shell user's can avoid any resulting navigation problems by using the pushd and popd built-in commands instead of cd.
OPTIONS -f Force a hard link to a directory. This option is only available to the super-user, and should be used with extreme caution.
-s Create a symbolic link or links.
USAGE
See largefile(5) for the description of the behavior of ln when encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).
EXAMPLES
Example 1 The /usr/ucb/ln command
The commands below illustrate the effects of the different forms of the /usr/ucb/ln command:
example% /usr/ucb/ln file link
example% ls -F file link
file link
example% /usr/ucb/ln -s file symlink
example% ls -F file symlink
file symlink@
example% ls -li file link symlink
10606 -rw-r--r-- 2 user 0 Jan 12 00:06 file
10606 -rw-r--r-- 2 user 0 Jan 12 00:06 link
10607 lrwxrwxrwx 1 user 4 Jan 12 00:06 symlink -> file
example% /usr/ucb/ln -s nonesuch devoid
example% ls -F devoid
devoid@
example% cat devoid
devoid: No such file or directory
example% /usr/ucb/ln -s /proto/bin/* /tmp/bin
example% ls -F /proto/bin /tmp/bin
/proto/bin:
x* y* z*
/tmp/bin:
x@ y@ z@
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWscpu |
+-----------------------------+-----------------------------+
SEE ALSO cp(1), ls(1), mv(1), rm(1), link(2), readlink(2), stat(2), symlink(2), attributes(5), largefile(5)NOTES
When the last argument is a directory, simple basenames should not be used for pathname arguments. If a basename is used, the resulting
symbolic link points to itself:
example% /usr/ucb/ln -s file /tmp
example% ls -l /tmp/file
lrwxrwxrwx 1 user 4 Jan 12 00:16 /tmp/file -> file
example% cat /tmp/file
/tmp/file: Too many levels of symbolic links
To avoid this problem, use full pathnames, or prepend a reference to the PWD variable to files in the working directory:
example% rm /tmp/file
example% /usr/ucb/ln -s $PWD/file /tmp
lrwxrwxrwx 1 user 4 Jan 12 00:16 /tmp/file ->
/home/user/subdir/file
SunOS 5.11 11 Mar 1994 ln(1B)