Golang : Get absolute path to binary for os.Exec function with exec.LookPath
Sometimes it is good to tell our Golang program to execute exactly which binary file based on the path. For instance, there will be situation where due to poor system administration on client's machine....possible...duplicate binaries might caused unwanted/weird result due to different versions.
Before we can execute a binary with os.Exec()
, Go needs to know the absolute path to the binary. This can be accomplish with the exec.LookPath()
function.
If the path returned by exec.LookPath()
function is not what you after, then you want to change the path variable before executing.
For example :
package main
import (
"fmt"
"os/exec"
)
func main() {
path, err := exec.LookPath("dig")
if err != nil {
panic(err)
}
fmt.Println("Will be executing the binary at :", path)
// if path is not what you after, assign new string value to path
cmd := exec.Command(path, "any", "google.com")
out, err := cmd.Output()
if err != nil {
fmt.Println(err.Error())
return
}
fmt.Print(string(out))
}
Sample output :
Will be executing the binary at : /usr/bin/dig
Reference :
See also : Golang : Execute shell command
By Adam Ng
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+2.5k Golang : Compound interest over time example
+9.2k Golang : Convert(cast) int to float example
+4.3k Golang : Remove or trim extra comma from CSV
+2.8k Golang : Pagination with go-paginator configuration example
+8.3k Golang : Convert(cast) int to int64
+5.2k Golang : Convert file unix timestamp to UTC time example
+1.1k Golang : How to detect if a sentence ends with a punctuation?
+3.1k Golang : How to check if input string is a word?
+6.6k Generate Random number with math/rand in Go
+7.5k Golang : delete and modify XML file content
+9.2k Golang : How to add color to string?
+17.3k Golang : Call function from another package