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9pfuse: retries read(3) upon EINTR

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read(3) sometimes errors with EINTR on macOS over slow connections.
9pfuse(1) now retries read(3) instead of sysfatal(3)ing.
This commit is contained in:
Xiao-Yong Jin 2018-03-14 20:27:46 -05:00 • committed by David du Colombier
parent 4798a8a556
commit 112744e54b
1 changed files with 5 additions and 2 deletions
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7
src/cmd/9pfuse/fuse.c
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@ -48,7 +48,6 @@ readfusemsg(void)
int n, nn;
m = allocfusemsg();
errno = 0;
/*
* The FUSE kernel device apparently guarantees
* that this read will return exactly one message.
@ -57,7 +56,11 @@ readfusemsg(void)
* FUSE returns an ENODEV error, not EOF,
* when the connection is unmounted.
*/
if((n = read(fusefd, m->buf, fusebufsize)) < 0){
do{
errno = 0;
n = read(fusefd, m->buf, fusebufsize);
}while(n < 0 && errno == EINTR);
if(n < 0){
if(errno != ENODEV)
sysfatal("readfusemsg: %r");
}