lib9p: Implemnt Topen, add permission checks in Twalk

1 files changed, 4 insertions, 0 deletions

diff --git a/lib9p/9p.c b/lib9p/9p.c
index 0e71071..b1d4c32 100644
--- a/lib9p/9p.c
+++ b/lib9p/9p.c
@@ -14,6 +14,8 @@
 #include "internal.h"
 
 int lib9p_error(struct lib9p_ctx *ctx, uint32_t linux_errno, char const *msg) {
+	if (lib9p_ctx_has_error(ctx))
+		return -1;
 	strncpy(ctx->err_msg, msg, sizeof(ctx->err_msg));
 	ctx->err_msg[sizeof(ctx->err_msg)-1] = '\0';
 	ctx->err_num = linux_errno;
@@ -24,6 +26,8 @@ int lib9p_errorf(struct lib9p_ctx *ctx, uint32_t linux_errno, char const *fmt, .
 	int n;
 	va_list args;
 
+	if (lib9p_ctx_has_error(ctx))
+		return -1;
 	va_start(args, fmt);
 	n = vsnprintf(ctx->err_msg, sizeof(ctx->err_msg), fmt, args);
 	va_end(args);