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- #include <u.h>
- #include <libc.h>
- #include <bio.h>
- long
- Bwrite(Biobufhdr *bp, void *ap, long count)
- {
- long c;
- uchar *p;
- int i, n, oc;
- char errbuf[ERRMAX];
- p = ap;
- c = count;
- oc = bp->ocount;
- while(c > 0) {
- n = -oc;
- if(n > c)
- n = c;
- if(n == 0) {
- if(bp->state != Bwactive)
- return Beof;
- i = write(bp->fid, bp->bbuf, bp->bsize);
- if(i != bp->bsize) {
- errstr(errbuf, sizeof errbuf);
- if(strstr(errbuf, "interrupt") == nil)
- bp->state = Binactive;
- errstr(errbuf, sizeof errbuf);
- return Beof;
- }
- bp->offset += i;
- oc = -bp->bsize;
- continue;
- }
- memmove(bp->ebuf+oc, p, n);
- oc += n;
- c -= n;
- p += n;
- }
- bp->ocount = oc;
- return count-c;
- }
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