From 5f9e33ad5596bb4fc0814e59b9044bce8051c801 Mon Sep 17 00:00:00 2001
From: ZoRo <dos21h@gmail.com>
Date: Tue, 16 Jun 2020 22:36:16 +0100
Subject: added 7 fs, intial info structures

---
 nmount.c | 104 ++++++++++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 86 insertions(+), 18 deletions(-)

diff --git a/nmount.c b/nmount.c
index a51664b..8e51ec3 100644
--- a/nmount.c
+++ b/nmount.c
@@ -37,12 +37,63 @@
 //#define MS_STRICTATIME	(1<<24) /* Always perform atime updates */
 //#define MS_LAZYTIME	(1<<25) /* Update the on-disk [acm]times lazily */
 
+#define STRUCT_LEN(VAR,STRUCT) ((sizeof(VAR)/sizeof(STRUCT))-1)
+
+typedef struct vfs_option_params {
+    char *val;
+    char *descr;
+} vfs_option_params;
+
+vfs_option_params vfs_options_proc_params_hidepid[] = {
+    {"0","Everybody may access all proc"},
+    {"1","User can access only their own proc, not other /proc/[pid]"},
+    {"2","As for mode 1, extra hides pid directories of others"},
+    {NULL,NULL},
+};
+
+vfs_option_params vfs_options_proc_params_gid[] = {
+    {"gid","usergroup who sees /proc in mode 0"},
+    {NULL,NULL},
+};
+
+typedef struct vfs_options 
+{
+    char *options;
+    char *description;
+    vfs_option_params **params;
+} vfs_options;
+
+vfs_options vfs_options_proc[] =
+{
+    {"hidepid=\%u" ,"",                                     &vfs_options_proc_params_hidepid},
+    {"gid=\%u"     ,"user group that can access process",   &vfs_options_proc_params_gid},
+    {NULL,NULL,NULL}
+};
+
+static const struct vfs {
+    char *name;
+    long flags;
+    char *mountpoint;
+    vfs_options *options;
+} vfstab[] = {
+    {"devtmpfs",  0, "/Device",  NULL},
+    {"mqueue",    0, "/MQueue/", NULL},
+    {"proc",      0, "/Process", &vfs_options_proc},
+    {"tmpfs",     0, "/Ram",     NULL},
+    {"sysfs",     0, "/System",  NULL},
+    {"ext4",      0, NULL,       NULL},
+    {"vfat",      0, NULL,       NULL},
+    {NULL,        0, NULL,       NULL},
+};
 
 typedef struct {
-    int f_output; //show statistics of pipe
-    int f_stopzero; //stop if 0 bytes in input
-    int f_nowriteout; // dont write to output
-    int f_graphmode; //show graph
+    char *f_device;
+    char *f_type;
+    char *f_dir;
+    char *f_flags;//g_params.f_output = 1;
+    char *f_options;
+    int   f_verbose;
+    int   f_helper;
 } mount_params;
 
 static mount_params g_params;
@@ -51,6 +102,14 @@ void helper(char *progname)
 {
     printf("Usage: %s [OPTS]\n\n"
         "Version: 0.0.1 \n"
+        "-d device to mount\n"
+        "-t filesystem type\n"
+        "-d mount directory\n"
+        "-f mount flags\n"
+        "-o mount fs options\n"
+        "-v verbose output\n"
+        "-h help options\n"
+        "-a helper for filetype options\n"
         "\n"
         , progname);
 }
@@ -71,13 +130,21 @@ void sig_handler(int signo)
     exit(0);
 }
 
-int smount(const char *source, const char *target,
-                 const char *filesystemtype, unsigned long mountflags,
-                 const void *data);
+int smount(
+    const char *source, 
+    const char *target,
+    const char *filesystemtype,
+    unsigned long mountflags,
+    const void *data)
+{
+
+    return 0;
+}
 
 int main(int argc, char **argv)
 {
     int c;
+    int i;
 
     printf("One big real mount\n");
 
@@ -88,12 +155,13 @@ int main(int argc, char **argv)
     }
     
     //process arguments
-    while ((c = getopt(argc, argv, "osng")) != -1)
+    while ((c = getopt(argc, argv, "a")) != -1)
     {
         switch (c)
         {
-            case 'v':
+            case 'a':
                 //g_params.f_output = 1;
+                g_params.f_helper = 1;
                 break;
             
             default:
@@ -102,16 +170,16 @@ int main(int argc, char **argv)
         }
     }
 
-    return 0;
-}
+    if (1 == g_params.f_helper)
+    {
+        for (i=0;i<STRUCT_LEN(vfstab,struct vfs);i++)
+        {
+            printf("%s %s\n",vfstab[i].name,vfstab[i].mountpoint);
+        }
+    }
 
-int smount(
-    const char *source, 
-    const char *target,
-    const char *filesystemtype,
-    unsigned long mountflags,
-    const void *data)
-{
 
     return 0;
 }
+
+
-- 
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