FreeBSD/src d65e72a (r343338)usr.bin/systat devs.c

Fix systat's :only command parser for the multiple arguments case

According to systat(1) :only option is supposed to accept multiple drives
but the parser for its arguments stops after first entry. Fix the parser
logic to accept multiple drives.

PR:             59220
Reported by:    Andy Farkas <andyf at speednet.com.au>
MFC after:      1 week
DeltaFile
+2-2usr.bin/systat/devs.c
+2-21 files

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