From 3e353773721596971db2d0abc7015e7ea3d3af07 Mon Sep 17 00:00:00 2001 From: Thomas Huth Date: Tue, 11 Oct 2016 17:19:36 +0200 Subject: tests/boot-sector: Use mkstemp() to create a unique file name The pxe-test is run for three different targets now (x86_64, i386 and ppc64), and the bios-tables-test is run for two targets (x86_64 and i386). But each of the tests is using an invariant name for the disk image with the boot sector code - so if the tests are running in parallel, there is a race condition that they destroy the disk image of a parallel test program. Let's use mkstemp() to create unique temporary files here instead - and since mkstemp() is returning an integer file descriptor instead of a FILE pointer, we also switch the fwrite() and fclose() to write() and close() instead. Reported-by: Sascha Silbe Signed-off-by: Thomas Huth Reviewed-by: Michael S. Tsirkin Signed-off-by: David Gibson --- tests/boot-sector.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) (limited to 'tests/boot-sector.c') diff --git a/tests/boot-sector.c b/tests/boot-sector.c index 0168fd0247..83993143a6 100644 --- a/tests/boot-sector.c +++ b/tests/boot-sector.c @@ -69,12 +69,13 @@ static uint8_t boot_sector[0x7e000] = { }; /* Create boot disk file. */ -int boot_sector_init(const char *fname) +int boot_sector_init(char *fname) { - FILE *f = fopen(fname, "w"); + int fd, ret; size_t len = sizeof boot_sector; - if (!f) { + fd = mkstemp(fname); + if (fd < 0) { fprintf(stderr, "Couldn't open \"%s\": %s", fname, strerror(errno)); return 1; } @@ -86,8 +87,14 @@ int boot_sector_init(const char *fname) HIGH(SIGNATURE), BOOT_SECTOR_ADDRESS + SIGNATURE_OFFSET + 1); } - fwrite(boot_sector, 1, len, f); - fclose(f); + ret = write(fd, boot_sector, len); + close(fd); + + if (ret != len) { + fprintf(stderr, "Could not write \"%s\"", fname); + return 1; + } + return 0; } -- cgit v1.2.3-55-g7522