Check if argument passed is an integers

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Getting number of argument passed to a shell script

Hi Experts, I have been trying to work on a simple shell script that will just add the two argument passed to it. Here is what i tried : #!/bin/bash welcome(){ echo "Welcome to this Progg. which will accept two parameter" } main_logic(){ arg=$# echo "Number of argument passed is...

2. How to Post in the The UNIX and Linux Forums

Read a json file passed as cmd line argument

usage: myscript.sh config.json config.json: { "HOST":"abc", "DB_NM":"xyz", "USR_NM":"asd", "PWD":"xxx", ......... ......... ......... ........ } myscript.sh:

3. Shell Programming and Scripting

Grep float/integers but skip some integers

Hi, I am working in bash in Mac OSX, I have following 'input.txt' file: <INFO> HypoTestTool: >>> Done running HypoTestInverter on the workspace combined <INFO> HypoTestTool: The computed upper limit is: 11 +/- 1.02651 <INFO> HypoTestTool: expected limit (median) 11 <INFO> HypoTestTool: ...

4. Shell Programming and Scripting

Variable passed as argument

I have a script. #!/bin/sh cur_$1_modify_time=Hello echo "cur_$1_modify_time" When I run like sh /root/script1 jj I expect value "Hello" being assigned to variable "cur_jj_modify_time" and output being "Hello" ie echoing $cur_jj_modify_time But the output comes as # sh...

5. Shell Programming and Scripting

Shell script that check the argument passed to it and prints error if test condition is not met

I want to make a script that check for the argument passed to it and generates an error in case any character/string argument passed to it. I am using below code, but its not working. can anyone help. #!/bin/bash if ]; then echo 'An integer argument is passed to the script hence...

6. Shell Programming and Scripting

shell script for ftp files passed in command line argument

i want to write a shell script function that will ftp the files passed in the command line . i have written a shell script for ftp but how will it do for all files passed in command line argument , i am passing 4 files as argument ./ftp.sh file1 file2 file3 file4 code written by me...

7. Shell Programming and Scripting

Check if passed arguments is users

i want to check passed arguments one by one and if it is user print home director of that user

8. Shell Programming and Scripting

File not recognized when passed as argument

I have the below script in file read_file.ksh if ] || ] then echo "Required one input file" echo "Enter a file to get char count:" read $FILE_NAME if ] then echo "valid file" else echo "Not a valid file." fi When run as read_file.ksh detail.csv or...

9. Shell Programming and Scripting

How to check that passed parameters all have the same extension?

$ ls monkey.txt banana.csv tree.txt $ myscript monkey.txt tree.txt All extensions ARE alike. $ myscript *txt All extensions ARE alike. $ myscript monkey.txt banana.csv All extensions are NOT alike. $ myscript * All extensions are NOT alike. My brain has given up; what's the simplest...

10. Shell Programming and Scripting

how to print all argument passed

like i have script with which i have passed arg list :eg: i/p: scriopt1 arg1 arg2 arg3 .... argn o/p: arg1 arg2 arg3 .... argn

LEARN ABOUT FREEBSD

re_comp

RE_COMP(3)						   BSD Library Functions Manual 						RE_COMP(3)

NAME

     re_comp, re_exec -- regular expression handler

LIBRARY

     Compatibility Library (libcompat, -lcompat)

SYNOPSIS

     #include <unistd.h>

     char *
     re_comp(const char *s);

     int
     re_exec(const char *s);

DESCRIPTION

     This interface is made obsolete by regex(3).

     The re_comp() function compiles a string into an internal form suitable for pattern matching.  The re_exec() function checks the argument
     string against the last string passed to re_comp().

     The re_comp() function returns 0 if the string s was compiled successfully; otherwise a string containing an error message is returned.  If
     re_comp() is passed 0 or a null string, it returns without changing the currently compiled regular expression.

     The re_exec() function returns 1 if the string s matches the last compiled regular expression, 0 if the string s failed to match the last
     compiled regular expression, and -1 if the compiled regular expression was invalid (indicating an internal error).

     The strings passed to both re_comp() and re_exec() may have trailing or embedded newline characters; they are terminated by NULs.	The regu-
     lar expressions recognized are described in the manual entry for ed(1), given the above difference.

DIAGNOSTICS

     The re_exec() function returns -1 for an internal error.

     The re_comp() function returns ``no previous regular expression'' or one of the strings generated by regerror(3).

SEE ALSO

     ed(1), egrep(1), ex(1), fgrep(1), grep(1), regex(3)

HISTORY

     The re_comp() and re_exec() functions appeared in 4.0BSD.

BSD
								   June 4, 1993 							       BSD

Shell Programming and Scripting