lsfd: add tmpfs as source of sysvipc to the the nodev_table

Signed-off-by: Masatake YAMATO <yamato@redhat.com>

diff --git a/misc-utils/lsfd-file.c b/misc-utils/lsfd-file.c
index 99cff5992c4aa4bb511314d19d64543d4a46d7c1..345d97103b254418d9c9ebc022554f555d9e19ac 100644 (file)
--- a/misc-utils/lsfd-file.c
+++ b/misc-utils/lsfd-file.c
@@ -32,6 +32,7 @@
 # endif
 #endif
 #include <linux/sched.h>
+#include <sys/shm.h>
 
 #include "xalloc.h"
 #include "nls.h"
@@ -39,6 +40,7 @@
 #include "idcache.h"
 #include "strutils.h"
 
+#include "procfs.h"
 #include "libsmartcols.h"
 
 #include "lsfd.h"
@@ -300,14 +302,63 @@ static void file_free_content(struct file *file)
        free(file->name);
 }
 
+static unsigned long get_minor_for_sysvipc(void)
+{
+       int id;
+       void *start;
+
+       pid_t self = getpid();
+       struct path_cxt *pc = NULL;
+       char map_file[sizeof("map_files/0000000000000000-ffffffffffffffff")];
+
+       struct stat sb;
+       unsigned long m = 0;
+
+       id = shmget(IPC_PRIVATE, pagesize, IPC_CREAT | 0600);
+       if (id == -1)
+               return 0;
+
+       start = shmat(id, NULL, SHM_RDONLY);
+       if (start == (void *) -1) {
+               shmctl(id, IPC_RMID, NULL);
+               return 0;
+       }
+
+       pc = ul_new_path(NULL);
+       if (!pc)
+               goto out;
+
+       if (procfs_process_init_path(pc, self) != 0)
+               goto out;
+
+       snprintf(map_file, sizeof(map_file),
+                "map_files/%lx-%lx", (long)start, (long)start + pagesize);
+       if (ul_path_stat(pc, &sb, 0, map_file) < 0)
+               goto out;
+
+       m = minor(sb.st_dev);
+ out:
+       if (pc)
+               ul_unref_path(pc);
+       shmdt(start);
+       shmctl(id, IPC_RMID, NULL);
+       return m;
+}
+
 static void file_class_initialize(void)
 {
+       unsigned long m;
+
        if (!pagesize)
                pagesize = getpagesize();
 
        username_cache = new_idcache();
        if (!username_cache)
                err(EXIT_FAILURE, _("failed to allocate UID cache"));
+
+       m = get_minor_for_sysvipc();
+       if (m)
+               add_nodev(m, "tmpfs");
 }
 
 static void file_class_finalize(void)