Date: Fri, 13 Mar 2026 15:39:20 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 293789] file(1) reads excessive input, takes a long time with slow devices Message-ID: <bug-293789-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293789 Bug ID: 293789 Summary: file(1) reads excessive input, takes a long time with slow devices Product: Base System Version: 16.0-CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: emaste@freebsd.org Raspberry Pi Pico (RP2040) exposes a virtual umass device with a FAT filesystem. Running `file -s` on the device took a long time: # time file -s /dev/da1s1 /dev/da1s1: DOS/MBR boot sector, code offset 0x3c+2, OEM-ID "MSWIN4.1", sectors/cluster 8, root entries 512, Media descriptor 0xf8, sectors/FAT 129, sectors/track 1, heads 1, hidden sectors 1, sectors 262143 (volumes > 32 MB), serial number 0x2d2c1, label: "RPI-RP2 ", FAT (16 bit) 8.80 real 0.00 user 0.00 sys ktrace shows that it's reading 7MiB: 9846 file 0.007679501 CALL read(0x3,0xc2398000640,0x700000) 9846 file 8.802080842 RET read 7340032/0x700000 -- You are receiving this mail because: You are the assignee for the bug.home | help
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