Juggie in #asterisk-dev was reporting problems where fgets would return

without reading  the whole line when using fastagi.  When this happens,
errno was set to EINTR or EAGAIN.  This patch accounts for the possibility
and lets fgets continue in that case.


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@80360 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_agi.c

@@ -1866,8 +1866,14 @@ static enum agi_result run_agi(struct ast_channel *chan, char *request, AGI *agi
 				ast_frfree(f);
 			}
 		} else if (outfd > -1) {
+			size_t len;
 			retry = RETRY;
-			if (!fgets(buf, sizeof(buf), readf)) {
+			buf[0] = '\0';
+retry_fgets:
+			len = strlen(buf);
+			if (!fgets(buf + len, sizeof(buf) - len, readf)) {
+				if (!feof(readf) && (errno == EINTR || errno == EAGAIN))
+					goto retry_fgets;
 				/* Program terminated */
 				if (returnstatus)
 					returnstatus = -1;
@@ -1879,6 +1885,8 @@ static enum agi_result run_agi(struct ast_channel *chan, char *request, AGI *agi
 				pid = -1;
 				break;
 			}
+			if (errno == EINTR || errno == EAGAIN)
+				goto retry_fgets;
 			/* get rid of trailing newline, if any */
 			if (*buf && buf[strlen(buf) - 1] == '\n')
 				buf[strlen(buf) - 1] = 0;