How to create read only file in Golang 1.20
0In this video we are going to generate source code for the GoLang Program, How to create read only file using chatGPT.
After generating we will verify and run the generated code.
IMPORTANT NOTE on SOURCE CODE: only source code that are acceptable by the youtube description box will be displayed.
##############SOURCE CODE#########################
package main
import (
"fmt"
"os"
)
func main() {
// create a new file with read-only permission
file, err := os.OpenFile("example.txt", os.O_CREATE|os.O_WRONLY, 0444)
if err != nil {
panic(err)
}
defer file.Close()
// write some text to the file
text := "This is some example text."
_, err = file.WriteString(text)
if err != nil {
panic(err)
}
fmt.Println("Read-only file created successfully.")
}
Below is the explanation for the program:
This program uses the os package to create a new file with read-only permission using the os.OpenFile function.
The file permission 0444 is used to specify read-only permission for the file. If an error occurs during the creation of the file,
the program will panic with the error message. The defer statement ensures that the file is closed when the program finishes executing.
Next, the program writes the text "This is some example text." to the file using the WriteString method.
If an error occurs during the write operation, the program will panic with the error message.
Finally, the program prints a message to indicate that the read-only file has been created successfully.
Note that since the file is read-only, any subsequent attempt to write to it will result in a runtime error.
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