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tests/boot-sector: Use mkstemp() to create a unique file name

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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 <x-qemu@se-silbe.de>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Thomas Huth 2016-10-11 17:19:36 +02:00 committed by David Gibson
parent 1ef2ef9629
commit 3e35377372
4 changed files with 16 additions and 9 deletions
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2
tests/bios-tables-test.c
View file

@ -112,7 +112,7 @@ typedef struct {
g_assert_cmpstr(ACPI_ASSERT_CMP_str, ==, expected); \
} while (0)
static const char *disk = "tests/acpi-test-disk.raw";
static char disk[] = "tests/acpi-test-disk-XXXXXX";
static const char *data_dir = "tests/acpi-test-data";
#ifdef CONFIG_IASL
static const char *iasl = stringify(CONFIG_IASL);

17
tests/boot-sector.c
View file

@ -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;
}

4
tests/boot-sector.h
View file

@ -14,8 +14,8 @@
#ifndef TEST_BOOT_SECTOR_H
#define TEST_BOOT_SECTOR_H
/* Create boot disk file. */
int boot_sector_init(const char *fname);
/* Create boot disk file. fname must be a suitable string for mkstemp() */
int boot_sector_init(char *fname);
/* Loop until signature in memory is OK. */
void boot_sector_test(void);

2
tests/pxe-test.c
View file

@ -19,7 +19,7 @@
#define NETNAME "net0"
static const char *disk = "tests/pxe-test-disk.raw";
static char disk[] = "tests/pxe-test-disk-XXXXXX";
static void test_pxe_one(const char *params, bool ipv6)
{