[ovs-dev] [PATCH 09/13] log: Support using /dev/stdin for opening logs read-only.
Ben Pfaff
blp at ovn.org
Fri Dec 8 00:12:36 UTC 2017
On Unix-like systems, usually /dev/stdin opens a duplicate of fd 0, and
this will be convenient in a few places later on. This commit makes this
support universal.
Signed-off-by: Ben Pfaff <blp at ovn.org>
---
ovsdb/log.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/ovsdb/log.c b/ovsdb/log.c
index 1769e12266d1..d25f766474dc 100644
--- a/ovsdb/log.c
+++ b/ovsdb/log.c
@@ -166,7 +166,13 @@ ovsdb_log_open(const char *name, const char *magic,
#ifdef _WIN32
flags = flags | O_BINARY;
#endif
- fd = open(name, flags, 0666);
+ /* Special case for /dev/stdin to make it work even if the operating system
+ * doesn't support it under that name. */
+ if (!strcmp(name, "/dev/stdin") && open_mode == OVSDB_LOG_READ_ONLY) {
+ fd = dup(STDIN_FILENO);
+ } else {
+ fd = open(name, flags, 0666);
+ }
if (fd < 0) {
const char *op = (open_mode == OVSDB_LOG_CREATE_EXCL ? "create"
: open_mode == OVSDB_LOG_CREATE ? "create or open"
--
2.10.2
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