Golang : Find file size(disk usage) with filepath.Walk
Need to determine which file is taking up all the disk space? Maybe this small Golang program can be useful to you. The purpose of this small Golang program is to find out how much space a file occupies in a given target directory.
package main
import (
"fmt"
"os"
)
// function to return the disk usage information
func diskUsage(currentPath string, info os.FileInfo) int64 {
size := info.Size()
if !info.IsDir() {
return size
}
dir, err := os.Open(currentPath)
if err != nil {
fmt.Println(err)
return size
}
defer dir.Close()
files, err := dir.Readdir(-1)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
for _, file := range files {
if file.Name() == "." || file.Name() == ".." {
continue
}
size += diskUsage(currentPath+"/"+file.Name(), file)
}
fmt.Printf("Size in bytes : [%d] : [%s]\n", size, currentPath)
return size
}
func main() {
if len(os.Args) != 2 {
fmt.Printf("USAGE : %s <target_directory> \n", os.Args[0])
os.Exit(0)
}
dir := os.Args[1] // get the target directory
info, err := os.Lstat(dir)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
diskUsage(dir, info)
}
Sample output :
$ ./diskusage /Users/ | more
Size in bytes : [68] : [/Users//Shared/SC Info]
Size in bytes : [204] : [/Users//Shared]
Size in bytes : [139] : [/Users//sweetlogic/.atom/.apm]
Size in bytes : [402] : [/Users//sweetlogic/.atom/compile-cache/coffee]
Size in bytes : [895] : [/Users//sweetlogic/.atom/compile-cache/cson]
See also : Golang : Read directory content with filepath.Walk()
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
+11k Golang : Detect user location with HTML5 geo-location
+11k Golang : Decompress zlib file example
+18.9k Golang : Check if os.Stdin input data is piped or from terminal
+9.8k Golang : Interfacing with PayPal's IPN(Instant Payment Notification) example
+8k Golang : Heap sort example
+8.7k Golang : How to generate Code 39 barcode?
+6.8k Gogland : Single File versus Go Application Run Configurations
+5.5k Golang : Extract sub-strings
+8.5k Golang : Web(Javascript) to server-side websocket example
+16.3k Golang : When to use init() function?
+4.1k Golang : Get a list of crosses(instruments) available to trade from Oanda account
+24.9k Golang : Get executable name behind process ID example