What is the use of the first two lines in the script? What if I save the file without them? What will be the effect? They are not comments. Im very new to this, please help!
The first line of a script should be the shebang #! which it says what program is supposed to run the script when you make the file executable and run it as ./script.sh
However the script can be run as: ksh script.sh
If you remove the shebang that's the only option you have.
Anything that starts with just a # (except the #!, when is the first line) will be ignored as commands. They are just human readable comments.
I am assuming that the following does not exist in your actual script, since that will be incorrect.
Note that your #!bin/ksh should be #!/bin/ksh if your ksh shell lives there.
Hi,
Is there any way to extract function headers from c and c++ files using a shell script? I tried to do it by reading the C/C++ file line by line and if a line matches a particular pattern (pattern of function header) i extracted it otherwise moved to next line. The problem here is, some... (3 Replies)
The question is here:
http://farm9.staticflickr.com/8065/8217767191_2154e64904_b.jpg
My problem is that when I made up a non-existing directory, it prints out "hiii". It didn't enter the first if statement. It works if my directory exist.
My Work:
for fileOrDirectory in $* # all... (1 Reply)
1. The problem statement, all variables and given/known data:
My problem is that when I made up a non-existing directory, it prints out "hiii". It didn't enter the first if statement. It works if my directory exist.
2. Relevant notes:
The question is here:... (3 Replies)
I need a script which should watch a directory for a file with specific directory.
If it finds a file in directory, it should search for few specific keyword in the file. if the keyword exists, it should trim string from specific column.
The file should be moved to another directory and the a... (8 Replies)
Hi Team -
I"m very new to Shell Scripting so I have a rather novice question. My forte is Windows Batch Scripting so I was just wondering what the Shell Script equivalent is to the DOS command %~n?
%~n is a DOS variable that dispayed the script name.
For instance (in DOS):
REM... (11 Replies)
Hi everyone,
I need to write a script to search a directory, output the name of a file to an ouput file and print the last few lines of the files to the output file such that I would have something like this:
FILE1:
LINE
LINE
LINE
FILE2:
LINE
LINE
LINE
FILE3:
LINE
LINE
LINE... (2 Replies)
I have a script, which is checking if file exists and move it to another directory
if
then
mkdir -p ${LOCL_FILES_DIR}/cool_${Today}/monthly
mv report_manual_alloc_rpt_A_I_ASSIGNMENT.${Today}*.csv ${LOCL_FILES_DIR}/cool_${Today}/monthly
... (9 Replies)
I want to make a config file which contain all the paths.
i want to read the config file line by line and pass as an argument on my below function.
Replace all the path with reading config path line by line and pass in respective functions.
how can i achieve that?
Kindly guide.
... (6 Replies)
Discussion started by: sadique.manzar
6 Replies
LEARN ABOUT SUNOS
return
exit(1) User Commands exit(1)NAME
exit, return, goto - shell built-in functions to enable the execution of the shell to advance beyond its sequence of steps
SYNOPSIS
sh
exit [n]
return [n]
csh
exit [ ( expr )]
goto label
ksh
*exit [n]
*return [n]
DESCRIPTION
sh
exit will cause the calling shell or shell script to exit with the exit status specified by n. If n is omitted the exit status is that of
the last command executed (an EOF will also cause the shell to exit.)
return causes a function to exit with the return value specified by n. If n is omitted, the return status is that of the last command exe-
cuted.
csh
exit will cause the calling shell or shell script to exit, either with the value of the status variable or with the value specified by the
expression expr.
The goto built-in uses a specified label as a search string amongst commands. The shell rewinds its input as much as possible and searches
for a line of the form label: possibly preceded by space or tab characters. Execution continues after the indicated line. It is an error to
jump to a label that occurs between a while or for built-in command and its corresponding end.
ksh
exit will cause the calling shell or shell script to exit with the exit status specified by n. The value will be the least significant 8
bits of the specified status. If n is omitted then the exit status is that of the last command executed. When exit occurs when executing
a trap, the last command refers to the command that executed before the trap was invoked. An end-of-file will also cause the shell to exit
except for a shell which has the ignoreeof option (See set below) turned on.
return causes a shell function or '.' script to return to the invoking script with the return status specified by n. The value will be the
least significant 8 bits of the specified status. If n is omitted then the return status is that of the last command executed. If return
is invoked while not in a function or a '.' script, then it is the same as an exit.
On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not
performed.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO break(1), csh(1), ksh(1), sh(1), attributes(5)SunOS 5.10 15 Apr 1994 exit(1)