hidepid part 4

1 files changed, 21 insertions, 0 deletions

diff --git a/src/lib/common.c b/src/lib/common.c
index fc4c167ba..ea0ab781a 100644
--- a/src/lib/common.c
+++ b/src/lib/common.c
@@ -260,5 +260,26 @@ int pid_proc_cmdline_x11_xpra_xephyr(const pid_t pid) {
         return 0;
 }
 
+// return 1 if /proc is mounted hidepid, or if /proc/mouns access is denied
+#define BUFLEN 4096
+int pid_hidepid(void) {
+        FILE *fp = fopen("/proc/mounts", "r");
+        if (!fp)
+                return 1;
+                
+        char buf[BUFLEN];
+        while (fgets(buf, BUFLEN, fp)) {
+                if (strstr(buf, "proc /proc proc")) {
+                        fclose(fp);
+                        // check hidepid
+                        if (strstr(buf, "hidepid=2") || strstr(buf, "hidepid=1"))
+                                return 1;
+                        return 0;
+                }
+        }
+        
+        return 0;
+}
+