shithub: 9pro

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assume write/read might have to be called more than once; ignore SIGPIPE in favor of EPIPE errno

--- a/9pex.c

+++ b/9pex.c

@@ -151,10 +151,15 @@

 static int

 wrsend(void)

 {

+	uint32_t n;

+	int w;

+

 	if (wrend == 0)

 		return 0;

-	if (write(out, wrbuf, wrend) != wrend) {

-		perror("write");

+	for (n = 0; n < wrend && (w = write(out, wrbuf+n, wrend-n)) > 0; n += w);

+	if (w <= 0) {

+		if (errno != EPIPE) /* remote end closed */

+			perror("write");

 		return -1;

 	}

 	if (debug >= 2)

@@ -531,12 +536,15 @@

 static uint8_t *

 ctxread(C9ctx *c, uint32_t size, int *err)

 {

-	int n;

+	uint32_t n;

+	int r;

 	used(c);

+	r = 0;

 	*err = 0;

-	if ((n = read(in, rdbuf, size)) != (int)size) {

-		if (n == 0)

+	for (n = 0; n < size && (r = read(in, rdbuf, size)) > 0; n += r);

+	if (r <= 0) {

+		if (r == 0)

 			eof = 1;

 		else

 			*err = 1;

@@ -867,6 +875,8 @@

 	wrbufsz = ctx.msize;

 	wrbuf = calloc(1, wrbufsz);

 	wroff = wrend = 0;

+

+	signal(SIGPIPE, SIG_IGN);

 	err = NULL;

 	rdonly = block = 1; /* at first we wait until the client sends in data */