From: Nikita Shubin <nikita.shubin@maquefel.me>
Date: Thu, 13 Mar 2025 08:25:54 +0000 (+0300)
Subject: fully simulate send/rcv not only ioctl()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;p=qemu-gpiodev%2Fqemu-gpio-tools

fully simulate send/rcv not only ioctl()

Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
---

diff --git a/src/gpio-utils.c b/src/gpio-utils.c
index 02c1256..50cbeda 100644
--- a/src/gpio-utils.c
+++ b/src/gpio-utils.c
@@ -86,7 +86,14 @@ int gpiotools_request_line(int fd, unsigned int *lines,
 	if (ret != sizeof(req)) {
 		ret = -errno;
 		fprintf(stderr, "Failed to write request %s (%d), %s\n",
-			    "GPIO_V2_GET_LINE_IOCTL", ret, strerror(errno));
+	  		    "GPIO_V2_GET_LINE_IOCTL", ret, strerror(errno));
+	}
+
+	ret = recv(fd, &req, sizeof(req), MSG_WAITALL);
+	if (ret != sizeof(req)) {
+		ret = -errno;
+		fprintf(stderr, "Failed to read request %s (%d), %s\n",
+	  		    "GPIO_V2_GET_LINE_IOCTL", ret, strerror(errno));
 	}
 
 	req.fd = fd;
@@ -158,10 +165,18 @@ int gpiotools_get_values(const int fd, struct gpio_v2_line_values *values)
 		goto exit;
 	}
 
+	ret = write(fd, values, sizeof(*values));
+	if (ret != sizeof(*values)) {
+		ret = -errno;
+		fprintf(stderr, "Failed to write %s (%d), %s\n",
+			"GPIO_V2_LINE_GET_VALUES_IOCTL", ret, strerror(errno));
+		goto exit;
+	}	
+
 	ret = recv(fd, &values, sizeof(*values), MSG_WAITALL);
 	if (ret != sizeof(*values)) {
 		ret = -errno;
-		fprintf(stderr, "Failed to recieve %s (%d), %s\n",
+		fprintf(stderr, "Failed to read %s (%d), %s\n",
 			"GPIO_V2_LINE_GET_VALUES_IOCTL", ret, strerror(errno));
 	}