كود:
#!/bin/bash

INPUT_FILE="$1"

# Check if file was provided and exists

if [ -z "$INPUT_FILE" ]; then

  echo "Usage: $0 <input_file>"

  exit 1

fi

if [ ! -f "$INPUT_FILE" ]; then

  echo "Error: File not found at $INPUT_FILE"

  exit 1

fi

# Example: Read the file line by line

while IFS= read -r line; do

  echo "Next line: $line"

done < "$INPUT_FILE"

Redirecting the file content to standard input

The script reads directly from its standard input (stdin), which the shell connects to the file's content using the

كود:
<

operator.

[b]How to run the script:[/b]

bash

كود:
./your_script.sh < /path/to/input_file.txt

[b]Inside [/b]

كود:
your_script.sh

[b]:[/b]

The script uses commands that read from stdin, such as

كود:
read

,

كود:
cat

,

كود:
grep

,

كود:
tr

, etc.

bash

كود:
#!/bin/bash

# Example: Read from standard input line by line

while IFS= read -r line; do

  echo "Next line: $line"

done

# The loop reads from stdin because no redirection is specified in the while command itself.

# Alternatively, other commands can use stdin directly:

# tr 'a-z' 'A-Z' # This would convert all input to uppercase

3. Using custom argument parsing (for

كود:
input_file=

)

If you want to use the specific

كود:
input_file=

format as in your example, you need to parse the arguments manually within your script.

[b]How to run the script:[/b]

bash

كود:
./your_script.sh input_file=/path/to/file.txt

[b]Inside [/b]

كود:
your_script.sh

[b]:[/b]

bash

كود:
#!/bin/bash

for arg in "$@"; do

  case "$arg" in

    input_file=*)

      INPUT_FILE="${arg#*=}" # Extract the value after the '='

      ;;

    *)

      # Handle other arguments or errors

      ;;

  esac

done

# Now you can use $INPUT_FILE as in Method 1

if [ -f "$INPUT_FILE" ]; then

  echo "Processing file: $INPUT_FILE"

  # ... processing code here ...

else

  echo "Error: File not found or not specified."

fi

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