cmd/utils: add workaround for FreeBSD statfs quirk (ethereum#22310)

gballet · cfilipescu · commit 66cd9790e76d · 2021-03-02T14:46:03.000-05:00
Make geth build on FreeBSD, fixes ethereum#22309.
diff --git a/cmd/utils/diskusage.go b/cmd/utils/diskusage.go
@@ -31,5 +31,12 @@ func getFreeDiskSpace(path string) (uint64, error) {
 	}
 
 	// Available blocks * size per block = available space in bytes
-	return stat.Bavail * uint64(stat.Bsize), nil
+	var bavail = stat.Bavail
+	if stat.Bavail < 0 {
+		// FreeBSD can have a negative number of blocks available
+		// because of the grace limit.
+		bavail = 0
+	}
+	//nolint:unconvert
+	return uint64(bavail) * uint64(stat.Bsize), nil
 }

Original file line number	Diff line number	Diff line change
`@@ -31,5 +31,12 @@ func getFreeDiskSpace(path string) (uint64, error) {`
`31`	`31`	`}`
`32`	`32`
`33`	`33`	`// Available blocks * size per block = available space in bytes`
`34`		`- return stat.Bavail * uint64(stat.Bsize), nil`
	`34`	`+ var bavail = stat.Bavail`
	`35`	`+ if stat.Bavail < 0 {`
	`36`	`+ // FreeBSD can have a negative number of blocks available`
	`37`	`+ // because of the grace limit.`
	`38`	`+ bavail = 0`
	`39`	`+ }`
	`40`	`+ //nolint:unconvert`
	`41`	`+ return uint64(bavail) * uint64(stat.Bsize), nil`
`35`	`42`	`}`