syscall.Unlinkat does not pass AT_REMOVEDIR #35935
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Duplicated #9923 |
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The syscall package is more or less frozen. Use the golang.org/x/sys/unix package instead. There the |
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What version of Go are you using (
go version)?Does this issue reproduce with the latest release?
Yes.
What operating system and processor architecture are you using (
go env)?go envOutputWhat did you do?
Ran this code, which calls
Unlinkat.What did you expect to see?
The program should print nothing (
errshould benil). Internally, the standard library is expected to pass theAT_REMOVEDIRflag to libc, as per #9923.What did you see instead?
The program prints
is not a directory- theUnlinkatreturnsEISDIRbecause it requires theAT_REMOVEDIRflag. By running anstraceon the above program, we can see that theAT_REMOVEDIRflag (0x200/512) is not being passed as the last parameter toUnlinkat:readlinkat(AT_FDCWD, "/proc/self/exe", "/tmp/x/x", 128) = 8 fcntl(0, F_GETFL) = 0x2 (flags O_RDWR) mmap(NULL, 262144, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7aa5733000 fcntl(1, F_GETFL) = 0x2 (flags O_RDWR) fcntl(2, F_GETFL) = 0x2 (flags O_RDWR) newfstatat(AT_FDCWD, "dir/subdir", {st_mode=S_IFDIR|0755, st_size=40, ...}, 0) = 0 openat(AT_FDCWD, "dir", O_RDONLY) = 3 + unlinkat(3, "subdir", 0) = -1 EISDIR (Is a directory) mmap(NULL, 262144, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7aa56f3000 openat(AT_FDCWD, "/etc//localtime", O_RDONLY) = 4 read(4, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\7\0\0\0\7\0\0\0\0"..., 4096) = 3648 read(4, "", 4096) = 0 close(4) = 0 write(2, "2019/12/02 18:04:12 is a directo"..., 352019/12/02 18:04:12 is a directory ) = 35 exit_group(1) = ?The text was updated successfully, but these errors were encountered: