diff options
Diffstat (limited to 'libavformat/file.c')
-rw-r--r-- | libavformat/file.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavformat/file.c b/libavformat/file.c index f37db1a88d..5765ce7e48 100644 --- a/libavformat/file.c +++ b/libavformat/file.c @@ -72,6 +72,7 @@ typedef struct FileContext { int fd; int trunc; int blocksize; + int follow; #if HAVE_DIRENT_H DIR *dir; #endif @@ -80,6 +81,7 @@ typedef struct FileContext { static const AVOption file_options[] = { { "truncate", "truncate existing files on write", offsetof(FileContext, trunc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM }, { "blocksize", "set I/O operation maximum block size", offsetof(FileContext, blocksize), AV_OPT_TYPE_INT, { .i64 = INT_MAX }, 1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM }, + { "follow", "Follow a file as it is being written", offsetof(FileContext, follow), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, { NULL } }; @@ -108,6 +110,8 @@ static int file_read(URLContext *h, unsigned char *buf, int size) int ret; size = FFMIN(size, c->blocksize); ret = read(c->fd, buf, size); + if (ret == 0 && c->follow) + return AVERROR(EAGAIN); return (ret == -1) ? AVERROR(errno) : ret; } |