The branch main has been updated by pho: URL: https://cgit.FreeBSD.org/src/commit/?id=d19f34821d661468486bdf4cacc9be795ac58780
commit d19f34821d661468486bdf4cacc9be795ac58780 Author: Peter Holm <[email protected]> AuthorDate: 2024-02-24 06:26:16 +0000 Commit: Peter Holm <[email protected]> CommitDate: 2024-02-24 06:26:16 +0000 stress2: Add a helper tool --- tools/test/stress2/tools/serial.c | 44 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/tools/test/stress2/tools/serial.c b/tools/test/stress2/tools/serial.c new file mode 100644 index 000000000000..8dcf9c5da3a8 --- /dev/null +++ b/tools/test/stress2/tools/serial.c @@ -0,0 +1,44 @@ +/* Fill a file with a sequence of byte values from 0 - 0xff */ + +#include <sys/param.h> +#include <sys/mman.h> +#include <err.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +int +main(int argc, char *argv[]) +{ + size_t i, size; + int fd; + char *cp, *file; + + if (argc != 3) { + fprintf(stderr, "Usage: %s <file> <file length in bytes>\n", argv[0]); + exit(1); + } + file = argv[1]; + size = atol(argv[2]); + + if ((fd = open(file, O_RDWR | O_CREAT | O_TRUNC, 0600)) < 0) + err(1, "%s", file); + + if (lseek(fd, size - 1, SEEK_SET) == -1) + err(1, "lseek error"); + + /* write a dummy byte at the last location */ + if (write(fd, "\0", 1) != 1) + err(1, "write error"); + + if ((cp = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == MAP_FAILED) + err(1, "mmap()"); + + for (i = 0; i < size; i++) + cp[i] = i & 0xff; + + if (munmap(cp, size) == -1) + err(1, "munmap"); + close(fd); +}
