signalfd: Add proc fdinfo parsing facility

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

include/proc_parse.h

@@ -8,6 +8,7 @@
 
 #include "../protobuf/eventfd.pb-c.h"
 #include "../protobuf/eventpoll.pb-c.h"
+#include "../protobuf/signalfd.pb-c.h"
 #include "../protobuf/inotify.pb-c.h"
 
 #define PROC_TASK_COMM_LEN	32
@@ -124,6 +125,7 @@ extern int parse_pid_status(pid_t pid, struct proc_status_creds *);
 union fdinfo_entries {
 	EventfdFileEntry efd;
 	EventpollTfdEntry epl;
+	SignalfdEntry sfd;
 	InotifyWdEntry ify;
 };
 

proc_parse.c

@@ -762,6 +762,22 @@ int parse_fdinfo(int fd, int type,
 			entry_met = true;
 			continue;
 		}
+		if (fdinfo_field(str, "sigmask")) {
+			signalfd_entry__init(&entry.sfd);
+
+			if (type != FD_TYPES__SIGNALFD)
+				goto parse_err;
+			ret = sscanf(str, "sigmask: %Lx",
+					(unsigned long long *)&entry.sfd.sigmask);
+			if (ret != 1)
+				goto parse_err;
+			ret = cb(&entry, arg);
+			if (ret)
+				return ret;
+
+			entry_met = true;
+			continue;
+		}
 		if (fdinfo_field(str, "inotify wd")) {
 			FhEntry f_handle = FH_ENTRY__INIT;
 			int hoff;