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Commit 3e46b253 authored by Mickaël Salaün's avatar Mickaël Salaün Committed by Richard Weinberger
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um: Use race-free temporary file creation 



Open the memory mapped file with the O_TMPFILE flag when available.

Signed-off-by: default avatarMickaël Salaün <mic@digikod.net>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Acked-by: default avatarTristan Schmelcher <tschmelcher@google.com>
Signed-off-by: default avatarRichard Weinberger <richard@nod.at>
parent 571d2f0c

arch/um/os-Linux/mem.c

+11 −0
Original line number Diff line number Diff line
@@ -106,6 +106,17 @@ static int __init make_tempfile(const char *template) 
		}

	}



#ifdef O_TMPFILE

	fd = open(tempdir, O_CLOEXEC | O_RDWR | O_EXCL | O_TMPFILE, 0700);

	/*

	 * If the running system does not support O_TMPFILE flag then retry

	 * without it.

	 */

	if (fd != -1 || (errno != EINVAL && errno != EISDIR &&

			errno != EOPNOTSUPP))

		return fd;

#endif



	tempname = malloc(strlen(tempdir) + strlen(template) + 1);

	if (tempname == NULL)

		return -1;