Attachment 236825 Details for Bug 266611 – Test program

Test program

copy_file_range_rlimit_fsize.c (text/plain), 1.03 KB, created by Alan Somers on 2022-09-25 23:15:52 UTC

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Creator: Alan Somers

Created: 2022-09-25 23:15:52 UTC

Size: 1.03 KB

patch

obsolete

>#include <sys/types.h>
>
>#include <sys/resource.h>
>#include <sys/time.h>
>
>#include <assert.h>
>#include <err.h>
>#include <fcntl.h>
>#include <stdlib.h>
>#include <unistd.h>
>
>size_t FSIZE = 65536;
>
>int main(int argc, char **argv) {
>	struct rlimit rl;
>	int infd, outfd;
>	char *buf;
>	size_t nbytes = FSIZE;
>	ssize_t r;
>	off_t ioff = 0, ooff = 0;
>
>	buf = calloc(FSIZE, 1);
>
>	infd = open("copy_file_range_rlimit_fsize_infile", O_RDWR | O_CREAT,
>		0644);
>	if (infd < 0)
>		err(1, "open");
>
>	while (nbytes > 0) {
>		int r;
>		if ((r = write(infd, buf, nbytes)) < 0)
>			err(1, "write");
>		nbytes -= r;
>	}
>
>	if (getrlimit(RLIMIT_FSIZE, &rl) != 0)
>		err(1, "getrlimit");
>
>	rl.rlim_cur = FSIZE / 2;
>	if (setrlimit(RLIMIT_FSIZE, &rl) != 0)
>		err(1, "setrlimit");
>
>	outfd = open("copy_file_range_rlimit_fsize_outfile", O_WRONLY | O_CREAT,
>		0644);
>	if (outfd < 0)
>		err(1, "open");
>
>	r = copy_file_range(infd, &ioff, outfd, &ooff, FSIZE, 0);
>	if (r < 0)
>		err(1, "copy_file_range");
>	if (r > rl.rlim_cur)
>		errx(1, "copy_file_range exceeded RLIMIT_FSIZE");
>
>	return (0);
>}

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Attachments on bug 266611: 236825