• Ksh File Test Operators

Shell script to read and write to a file. [file1-fixed.wav]: 100% OK Padded last file with 1194 zero-bytes. I get a test.ksh[4]: line1: not found [No such. > I have the below simple script that is working in ksh 93t+ version but failed. `zero byte' unexpected Is this in the above script or in the 'my_test_file. How do I check if a file is empty in a sh script I want to test in my shell script if the output file is. Check if file is empty. A non zero value.

We have a few operators that can be used to test various properties associated with a Unix file. Assume a variable file holds an existing file name 'test' the size of which is 100 bytes and has read, write and execute permission on − Operator Description Example -b file Checks if file is a block special file; if yes, then the condition becomes true. -b $file is false.c file Checks if file is a character special file; if yes, then the condition becomes true. -c $file is false.d file Checks if file is a directory; if yes, then the condition becomes true.

Ksh File Test Operators

-d $file is not true.f file Checks if file is an ordinary file as opposed to a directory or special file; if yes, then the condition becomes true. -f $file is true.g file Checks if file has its set group ID (SGID) bit set; if yes, then the condition becomes true.

-g $file is false.k file Checks if file has its sticky bit set; if yes, then the condition becomes true. -k $file is false.p file Checks if file is a named pipe; if yes, then the condition becomes true. -p $file is false.t file Checks if file descriptor is open and associated with a terminal; if yes, then the condition becomes true. -t $file is false.u file Checks if file has its Set User ID (SUID) bit set; if yes, then the condition becomes true. -u $file is false.r file Checks if file is readable; if yes, then the condition becomes true. -r $file is true.w file Checks if file is writable; if yes, then the condition becomes true.

-w $file is true.x file Checks if file is executable; if yes, then the condition becomes true. -x $file is true.s file Checks if file has size greater than 0; if yes, then condition becomes true. -s $file is true.e file Checks if file exists; is true even if file is a directory but exists.

-e $file is true.