[Minios-devel] [UNIKRAFT/NEWLIB PATCH 1/2] syslog.c: Bring back setlogmask() from musl

[Costin Lupu <costin.lupu@xxxxxxxxx>]

The OSv implementation, where we took this from, dropped the setlogmask()
function. We bring it back from the musl implementation because it is needed by
Python 3.

Signed-off-by: Costin Lupu <costin.lupu@xxxxxxxxx>
---
 musl-imported/src/syslog.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/musl-imported/src/syslog.c b/musl-imported/src/syslog.c
index 1792241..ee109f5 100644
--- a/musl-imported/src/syslog.c
+++ b/musl-imported/src/syslog.c
@@ -70,6 +70,7 @@
 static struct uk_mutex lock = UK_MUTEX_INITIALIZER(lock);
 static char log_ident[32];
 static int log_opt;
+static int log_mask = 0xff;
 static int log_facility = LOG_USER;
 
 void openlog(const char *ident, int opt, int facility)
@@ -95,6 +96,18 @@ void closelog(void)
 {
 }
 
+int setlogmask(int maskpri)
+{
+       int ret;
+
+       LOCK(lock);
+       ret = log_mask;
+       if (maskpri)
+               log_mask = maskpri;
+       UNLOCK(lock);
+       return ret;
+}
+
 void syslog(int priority, const char *message, ...)
 {
        va_list ap;
@@ -105,6 +118,9 @@ void syslog(int priority, const char *message, ...)
        int pid;
        int l, l2;
 
+       if (!(log_mask & LOG_MASK(priority & 7)) || (priority & ~0x3ff))
+               return;
+
        LOCK(lock);
 
        va_start(ap, message);
-- 
2.20.1


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