08-17-2011
Parsing a command line parameter in script
I have a simple script that builds a complex program call which passes a number of parameters to the program. I'm trying to enhance the script to include the value of the command line parameter in the name of a file being created. The problem I'm having is that the parameter may include a forward slash (/) which is not valid in filenames. Ideally I would like to replace any slashes with underscores. My script is called "sasi" and it will require a parameter which may contain 0 to n slashes. The first part of the parameter should be an 8-character string. If changing the slashes is too complicated, I'd be happy with capturing just the first 8 characters. I've been trying to use the 'cut' function to strip off the first 8, but it's not working. 'cut' may not be the best approach, but I think it will do the job if I get the syntax correct. However, I'm open to suggestions for better methods. The script begins like this:
#!/usr/bin/ksh
#
# UNIX script to initiate interactive SAS session,
# log and lst files are saved as "session_mmddhhmn"
# in the lstsave and logsave directories
#
log_mo=`date | cut -c5-7`
log_da=`date | cut -c9,10`
log_dw=`date | cut -c1-3`
log_hr=`date | cut -c12,13`
log_mn=`date | cut -c15,16`
log_sc=`date | cut -c18,19`
log_zn=`date | cut -c21-23`
log_yr=`date | cut -c25-28`
eval 'parm=\${1} | cut -c1-8'
echo &parm
When I try to run it, I get the message "parm: not found". Any assistance would be most appreciated.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
can someone please tell me how i can increase the number of characters that can be input on the command line? (2 Replies)
Discussion started by: Scoogie
2 Replies
2. Programming
I am writing a C program that part of the idea is to using a command line parameter to control not to run certain part of the sub program.
I am totally new to C, I do not have any idea how to pass a command line arguments from a C program.
Can anyone help ?!
Thanks (3 Replies)
Discussion started by: Wing m. Cheng
3 Replies
3. Shell Programming and Scripting
Anyone know how to set it up so that when at command line in unix (specifically solaris 2.5.1), and you hit the tab it will finish the command with the nearest file that matches? AND how to set it up so using up and down arrows access your previous commands?
Thanks for all the help here, i've had... (3 Replies)
Discussion started by: kymberm
3 Replies
4. Shell Programming and Scripting
Hello,
I am trying to replace a string with a paramter given along with the script.
I am replacing application1 to application2 with the script:
./change_app.sh application2
change_app.sh:
#!/bin/ksh
grep $1 applications.dat 2>&1 >/dev/null
echo $1
file=pckage.new
sed 's/Name:... (5 Replies)
Discussion started by: chiru_h
5 Replies
5. Shell Programming and Scripting
Say I have (in psuedocode)
For i=1 to 10
tar cvfb /... 5*i /junk(i)
end
What I mean is that I want each successive for loop to have the block size parameter be 5 times the current counter. This isn't my actual code, just a stupid example...So the question is how do I descrive that parameter... (2 Replies)
Discussion started by: jeriryan87
2 Replies
6. Shell Programming and Scripting
Hi,
I need to check if a parameter provided at the command line is equal to --.How can i do that ? Please help me.
Thanks and Regards,
Padmini (4 Replies)
Discussion started by: padmisri
4 Replies
7. Shell Programming and Scripting
"$#" gives the number of command-line arguments. How do you get the last command-line parameter (or any particular one determined by a variable)? I thought it would be "${$#}", but that produces something completely unexpected. (4 Replies)
Discussion started by: dkarr
4 Replies
8. Shell Programming and Scripting
i am a beginner, i want to make a program that takes any command line arguments... and print it out in reverse.
ie. if the command line argument is "thanks for helping me"
i want it to output "me helping for thanks" :D
i have tried using the reverse command, but i cant get it working!!
... (3 Replies)
Discussion started by: bshell_1214
3 Replies
9. UNIX and Linux Applications
I need to execute a .ksh from command line. The ksh calls a control file and has 3 parameters. First parameter is a csv file, second the target table in oracle and third parameter is a date parameter.
I am attempting the below from the ksh command line
{code} => testfile.ksh filname.csv... (1 Reply)
Discussion started by: kobe24
1 Replies
10. Shell Programming and Scripting
]I have a string like "/abc/cmind/def/pq/IC.2.4.6_main.64b/lnx86" and this string is given by user. But in this string instead of 64b user may passed 32 b an i need to parse this string and check wether its is 32b or 64 b and according to it i want to set appropriate flags.
How will i do this... (11 Replies)
Discussion started by: codecatcher
11 Replies
SCRIPT(1) BSD General Commands Manual SCRIPT(1)
NAME
script -- make typescript of terminal session
SYNOPSIS
script [-akq] [-t time] [file [command ...]]
DESCRIPTION
The script utility makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an
interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1).
If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript.
If the argument command is given, script will run the specified command with an optional argument vector instead of an interactive shell.
The following options are available:
-a Append the output to file or typescript, retaining the prior contents.
-k Log keys sent to program as well as output.
-q Run in quiet mode, omit the start and stop status messages.
-t time
Specify time interval between flushing script output file. A value of 0 causes script to flush for every character I/O event. The
default interval is 30 seconds.
The script ends when the forked shell (or command) exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-D (if
ignoreeof is not set) for the C-shell, csh(1)).
Certain interactive commands, such as vi(1), create garbage in the typescript file. The script utility works best with commands that do not
manipulate the screen. The results are meant to emulate a hardcopy terminal, not an addressable one.
ENVIRONMENT
The following environment variable is utilized by script:
SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most
shells set this variable automatically).
SEE ALSO
csh(1) (for the history mechanism).
HISTORY
The script command appeared in 3.0BSD.
BUGS
The script utility places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects.
It is not possible to specify a command without also naming the script file because of argument parsing compatibility issues.
When running in -k mode, echo cancelling is far from ideal. The slave terminal mode is checked for ECHO mode to check when to avoid manual
echo logging. This does not work when in a raw mode where the program being run is doing manual echo.
BSD
January 22, 2004 BSD