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Full Discussion: If statement arguments
Top Forums UNIX for Beginners Questions & Answers If statement arguments Post 303040317 by Eric7giants on Saturday 26th of October 2019 12:25:03 PM
Old 10-26-2019
If statement arguments
I'm stuck on a particular problem and need some guidance. I have a file with a name and a phone number in it (teledir.txt). I need to do a $# in a separate script to take a positional parameter and check to see if it is in the file. To quote the question:



Code:
If one argument is supplied, check to see if it starts with a digit, then search for it in the teledir.txt file. If it doesn't exist, echo "Doesn't Exist".


If argument starts with a letter, search for it in the file, If it doesn't exist, echo "Name does not exist" 



If two arguments are supplied, set the search_pattern to be “name: number”¯, and search it in the file. 
  •  If it is not found, echo “Adding entry”¯, and append to the file/variable.
    • 

  •  Otherwise, echo that “Entry exists”¯
    •

I am only two weeks into learning the command line prompt. This is the code I have gotten so far but I am stuck on where to go from here. Not sure if this will even work. Any pointers please!!!


Code:
#!/bin/bash

name=$1
number=$2


if [ $# -eq 0 ]; then
        echo "Two arguments are expected in the form of ./scriptname [name number]"
fi

if [ $# -eq 2 ]; then
        grep -qiw "$name\|$number" teledir.txt
        echo "$name or $number exists"
fi

 

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LEARN ABOUT BSD

ratfor

RATFOR(1)						      General Commands Manual							 RATFOR(1)

NAME

       ratfor - rational Fortran dialect

SYNOPSIS

       ratfor [ option ... ] [ filename ... ]

DESCRIPTION

       Ratfor  converts a rational dialect of Fortran into ordinary irrational Fortran.  Ratfor provides control flow constructs essentially iden-
       tical to those in C:

       statement grouping:
	      { statement; statement; statement }

       decision-making:
	      if (condition) statement [ else statement ]
	      switch (integer value) {
		   case integer:  statement
		   ...
		   [ default: ]   statement
	      }

       loops: while (condition) statement
	      for (expression; condition; expression) statement
	      do limits statement
	      repeat statement [ until (condition) ]
	      break
	      next

       and some syntactic sugar to make programs easier to read and write:

       free form input:
	      multiple statements/line; automatic continuation

       comments:
	      # this is a comment

       translation of relationals:
	      >, >=, etc., become .GT., .GE., etc.

       return (expression)
	      returns expression to caller from function

       define:
	      define name replacement

       include:
	      include filename

       Ratfor is best used with f77(1).

SEE ALSO

       f77(1)
       B. W. Kernighan and P. J. Plauger, Software Tools, Addison-Wesley, 1976.

7th Edition							  April 29, 1985							 RATFOR(1)
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