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tmpfs: /var as a protected tmpfs

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This commit is contained in:
K. Lange 2018-10-31 10:51:08 +09:00
parent b42c185421
commit 730fd9d64c
3 changed files with 25 additions and 4 deletions
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4
Makefile
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@ -150,11 +150,13 @@ base/lib:
mkdir -p $@
base/cdrom:
mkdir -p $@
base/var:
mkdir -p $@
fatbase/efi/boot:
mkdir -p $@
.make:
mkdir -p .make
dirs: base/dev base/tmp base/proc base/bin base/lib base/cdrom fatbase/efi/boot .make
dirs: base/dev base/tmp base/proc base/bin base/lib base/cdrom base/var fatbase/efi/boot .make
# C Library

24
modules/tmpfs.c
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@ -11,6 +11,7 @@
#include <kernel/mem.h>
#include <kernel/module.h>
#include <kernel/mod/tmpfs.h>
#include <kernel/tokenize.h>
/* 4KB */
#define BLOCKSIZE 0x1000
@ -537,7 +538,24 @@ fs_node_t * tmpfs_create(char * name) {
}
fs_node_t * tmpfs_mount(char * device, char * mount_path) {
fs_node_t * fs = tmpfs_create(device);
char * arg = strdup(device);
char * argv[10];
int argc = tokenize(arg, ",", argv);
fs_node_t * fs = tmpfs_create(argv[0]);
if (argc > 1) {
if (strlen(argv[1]) < 3) {
debug_print(WARNING, "ignoring bad permission option for tmpfs");
} else {
int mode = ((argv[1][0] - '0') << 6) |
((argv[1][1] - '0') << 3) |
((argv[1][2] - '0') << 0);
fs->mask = mode;
}
}
free(arg);
return fs;
}
@ -545,8 +563,8 @@ static int tmpfs_initialize(void) {
buf_space = (void*)kvmalloc(BLOCKSIZE);
vfs_mount("/tmp", tmpfs_create("tmp"));
vfs_mount("/var", tmpfs_create("var"));
vfs_mount("/tmp", tmpfs_mount("tmp","/tmp"));
vfs_mount("/var", tmpfs_mount("var,755","/var"));
vfs_register("tmpfs", tmpfs_mount);

1
util/update-devtable.py
View File

@ -35,4 +35,5 @@ with open('util/devtable','w') as devtable:
# Special case /tmp to allow all users to write
devtable.write('/tmp d 777 0 0 - - - - -\n')
devtable.write('/var d 755 0 0 - - - - -\n')