From: Roy Marples <roy@marples.name>
Date: Wed, 8 Jan 2020 16:57:46 +0000 (+0000)
Subject: Linux: privsep write uint to path needs to read the resultant error
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c55279517dc3df6743100c5e525d464010f563c6;p=thirdparty%2Fdhcpcd.git

Linux: privsep write uint to path needs to read the resultant error

Otherwise it hangs around and provides bogus errors to the next
caller of root processes.
---

diff --git a/src/privsep-linux.c b/src/privsep-linux.c
index 0bcd9275..375d4d4a 100644
--- a/src/privsep-linux.c
+++ b/src/privsep-linux.c
@@ -137,5 +137,8 @@ ps_root_writepathuint(struct dhcpcd_ctx *ctx, const char *path,
 	p += plen;
 	memcpy(p, &val, sizeof(val));
 
-	return ps_sendcmd(ctx, ctx->ps_root_fd, PS_WRITEPATHUINT, 0, buf, len);
+	if (ps_sendcmd(ctx, ctx->ps_root_fd, PS_WRITEPATHUINT,
+	    0, buf, len) == -1)
+		return -1;
+	return ps_root_readerror(ctx);
 }