stream_file: properly detect stdin as pipe

There is some code that checks a FD for whether it is a regular file or
not. If it's not a regular file, it e.g. enables use of poll() to avoid
blocking forever.

But this was done only for FDs that were open()ed by us, not from stdin
special handling or fd://. Consequently, " | mpv -" could block the
player. Fix this by moving the code and running for it on all FDs.

Also, set p->regular_file even on mingw.

1 files changed, 16 insertions, 17 deletions

diff --git a/stream/stream_file.c b/stream/stream_file.c
index 8778e7e011..2d0e3457c0 100644
--- a/stream/stream_file.c
+++ b/stream/stream_file.c
@@ -309,7 +309,6 @@ static int open_f(stream_t *stream)
         openmode |= S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
         if (!write)
             m |= O_NONBLOCK;
-        p->use_poll = true;
 #endif
         p->fd = open(filename, m | O_BINARY, openmode);
         if (p->fd < 0) {
@@ -317,25 +316,25 @@ static int open_f(stream_t *stream)
                    filename, mp_strerror(errno));
             return STREAM_ERROR;
         }
-        struct stat st;
-        if (fstat(p->fd, &st) == 0) {
-            if (S_ISDIR(st.st_mode)) {
-                p->use_poll = false;
-                stream->is_directory = true;
-                stream->allow_caching = false;
-                MP_INFO(stream, "This is a directory - adding to playlist.\n");
-            }
+        p->close = true;
+    }
+
+    struct stat st;
+    if (fstat(p->fd, &st) == 0) {
+        if (S_ISDIR(st.st_mode)) {
+            stream->is_directory = true;
+            stream->allow_caching = false;
+            MP_INFO(stream, "This is a directory - adding to playlist.\n");
+        } else if (S_ISREG(st.st_mode)) {
+            p->regular_file = true;
 #ifndef __MINGW32__
-            if (S_ISREG(st.st_mode)) {
-                p->use_poll = false;
-                p->regular_file = true;
-                // O_NONBLOCK has weird semantics on file locks; remove it.
-                int val = fcntl(p->fd, F_GETFL) & ~(unsigned)O_NONBLOCK;
-                fcntl(p->fd, F_SETFL, val);
-            }
+            // O_NONBLOCK has weird semantics on file locks; remove it.
+            int val = fcntl(p->fd, F_GETFL) & ~(unsigned)O_NONBLOCK;
+            fcntl(p->fd, F_SETFL, val);
 #endif
+        } else {
+            p->use_poll = true;
         }
-        p->close = true;
     }
 
 #ifdef __MINGW32__