calmsacibis995
85 lines
1.5 KiB
C
85 lines
1.5 KiB
C
/*
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* dpcp.c
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* Usage: dpcp file1 file2
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* This program accepts two arguments which are file names. file1 is
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* the source, file2 is the target.
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*/
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#include <stdio.h>
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#include <sys/uio.h>
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#include <dpipe.h>
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#include <sys/fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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main(int argc, char **argv) {
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char *source;
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char *target;
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int src, tgt;
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int pfd;
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struct dpipelist iov;
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struct stat buf;
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struct dpipexfer xfer;
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int src_c, tgt_c;
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if (argc != 3) {
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printf("Usage: dpcp source target\n");
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exit(1);
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}
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source = argv[1];
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target = argv[2];
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if ((src = open(source, O_RDONLY)) < 0) {
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perror("source can't open");
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exit(1);
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}
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/* need preallocation for target file? */
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if ((tgt = open (target, O_WRONLY | O_CREAT)) < 0) {
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perror ("target can't open");
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exit(1);
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}
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/* create pipe */
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if ((pfd = dpipeCreate(src, tgt)) < 0) {
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perror ("pipe create failure");
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exit(1);
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}
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/* create cookies */
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if (fstat(src, &buf) < 0) {
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perror ("fstat of source fail");
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exit(1);
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}
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iov.offset = 0;
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iov.size = buf.st_size;
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xfer.iovcnt = 1;
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xfer.iov = (__uint64_t)&iov;
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xfer.fd = src;
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if (fcntl(src, F_SETTRANSFER, &xfer) < 0) {
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perror ("fcntl F_SETTRANSFER source fail");
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exit(1);
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}
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src_c = xfer.cookie;
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xfer.fd = tgt;
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if (fcntl(tgt, F_SETTRANSFER, &xfer) < 0) {
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perror ("fcntl F_SETTRANSFER target fail");
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exit(1);
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}
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tgt_c = xfer.cookie;
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if (dpipeTransfer(pfd, src_c, tgt_c) < 0) {
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perror ("dpipe transfer fail");
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exit(1);
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}
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dpipeFlush(pfd);
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dpipeDestroy(pfd);
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close(src);
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close(tgt);
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}
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