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#define FUSE_USE_VERSION 26
#include <sys/types.h>
#include <sqlite3.h>
#include <pthread.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <fuse.h>
#include <pwd.h>
#include <tcl.h>
#ifndef APPFS_CACHEDIR
#define APPFS_CACHEDIR "/var/cache/appfs"
#endif
#ifdef DEBUG
#define APPFS_DEBUG(x...) { fprintf(stderr, "[debug] %s:%i:%s: ", __FILE__, __LINE__, __func__); fprintf(stderr, x); fprintf(stderr, "\n"); }
#else
#define APPFS_DEBUG(x...) /**/
#endif
static pthread_key_t interpKey;
struct appfs_thread_data {
sqlite3 *db;
const char *cachedir;
time_t boottime;
const char *platform;
struct {
int writable;
} options;
};
struct appfs_thread_data globalThread;
typedef enum {
APPFS_PATHTYPE_INVALID,
APPFS_PATHTYPE_FILE,
APPFS_PATHTYPE_DIRECTORY,
APPFS_PATHTYPE_SYMLINK
} appfs_pathtype_t;
struct appfs_children {
struct appfs_children *_next;
int counter;
char name[256];
};
struct appfs_pathinfo {
appfs_pathtype_t type;
time_t time;
char hostname[256];
int packaged;
unsigned long long inode;
union {
struct {
int childcount;
} dir;
struct {
int executable;
off_t size;
char sha1[41];
} file;
struct {
off_t size;
char source[256];
} symlink;
} typeinfo;
};
struct appfs_sqlite3_query_cb_handle {
struct appfs_children *head;
int argc;
const char *fmt;
};
static Tcl_Interp *appfs_create_TclInterp(const char *cachedir) {
Tcl_Interp *interp;
int tcl_ret;
APPFS_DEBUG("Creating new Tcl interpreter for TID = 0x%llx", (unsigned long long) pthread_self());
interp = Tcl_CreateInterp();
if (interp == NULL) {
fprintf(stderr, "Unable to create Tcl Interpreter. Aborting.\n");
return(NULL);
}
tcl_ret = Tcl_Init(interp);
if (tcl_ret != TCL_OK) {
fprintf(stderr, "Unable to initialize Tcl. Aborting.\n");
Tcl_DeleteInterp(interp);
return(NULL);
}
tcl_ret = Tcl_Eval(interp, ""
#include "appfsd.tcl.h"
"");
if (tcl_ret != TCL_OK) {
fprintf(stderr, "Unable to initialize Tcl AppFS script. Aborting.\n");
fprintf(stderr, "Tcl Error is: %s\n", Tcl_GetStringResult(interp));
Tcl_DeleteInterp(interp);
return(NULL);
}
if (Tcl_SetVar(interp, "::appfs::cachedir", cachedir, TCL_GLOBAL_ONLY) == NULL) {
fprintf(stderr, "Unable to set cache directory. This should never fail.\n");
Tcl_DeleteInterp(interp);
return(NULL);
}
tcl_ret = Tcl_Eval(interp, "::appfs::init");
if (tcl_ret != TCL_OK) {
fprintf(stderr, "Unable to initialize Tcl AppFS script (::appfs::init). Aborting.\n");
fprintf(stderr, "Tcl Error is: %s\n", Tcl_GetStringResult(interp));
Tcl_DeleteInterp(interp);
return(NULL);
}
Tcl_HideCommand(interp, "glob", "glob");
Tcl_HideCommand(interp, "exec", "exec");
Tcl_HideCommand(interp, "pid", "pid");
Tcl_HideCommand(interp, "auto_load_index", "auto_load_index");
Tcl_HideCommand(interp, "unknown", "unknown");
return(interp);
}
static int appfs_Tcl_Eval(Tcl_Interp *interp, int objc, const char *cmd, ...) {
Tcl_Obj **objv;
const char *arg;
va_list argp;
int retval;
int i;
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#define FUSE_USE_VERSION 26
#include <sys/types.h>
#include <pthread.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <fuse.h>
#include <pwd.h>
#include <tcl.h>
/*
* Default cache directory
*/
#ifndef APPFS_CACHEDIR
#define APPFS_CACHEDIR "/var/cache/appfs"
#endif
/* Debugging macros */
#ifdef DEBUG
#define APPFS_DEBUG(x...) { fprintf(stderr, "[debug] %s:%i:%s: ", __FILE__, __LINE__, __func__); fprintf(stderr, x); fprintf(stderr, "\n"); }
#else
#define APPFS_DEBUG(x...) /**/
#endif
/*
* SHA1 Tcl Package initializer, from sha1.o
*/
int Sha1_Init(Tcl_Interp *interp);
/*
* Thread Specific Data (TSD) for Tcl Interpreter for the current thread
*/
static pthread_key_t interpKey;
/*
* Data for a given thread (most likely these will become just globable variables soon.)
*/
struct appfs_thread_data {
const char *cachedir;
time_t boottime;
struct {
int writable;
} options;
};
/* The global thread data (likely to go away) */
struct appfs_thread_data globalThread;
/*
* AppFS Path Type: Describes the type of path a given file is
*/
typedef enum {
APPFS_PATHTYPE_INVALID,
APPFS_PATHTYPE_FILE,
APPFS_PATHTYPE_DIRECTORY,
APPFS_PATHTYPE_SYMLINK
} appfs_pathtype_t;
/*
* AppFS Children Files linked-list
*/
struct appfs_children {
struct appfs_children *_next;
char name[256];
};
/*
* AppFS Path Information:
* Completely describes a specific path, how it should be returned to
* to the kernel
*/
struct appfs_pathinfo {
appfs_pathtype_t type;
time_t time;
char hostname[256];
int packaged;
unsigned long long inode;
union {
struct {
int childcount;
} dir;
struct {
int executable;
off_t size;
} file;
struct {
off_t size;
char source[256];
} symlink;
} typeinfo;
};
/*
* Create a new Tcl interpreter and completely initialize it
*/
static Tcl_Interp *appfs_create_TclInterp(void) {
Tcl_Interp *interp;
const char *cachedir = globalThread.cachedir;
int tcl_ret;
APPFS_DEBUG("Creating new Tcl interpreter for TID = 0x%llx", (unsigned long long) pthread_self());
interp = Tcl_CreateInterp();
if (interp == NULL) {
fprintf(stderr, "Unable to create Tcl Interpreter. Aborting.\n");
return(NULL);
}
tcl_ret = Tcl_Init(interp);
if (tcl_ret != TCL_OK) {
fprintf(stderr, "Unable to initialize Tcl. Aborting.\n");
fprintf(stderr, "Tcl Error is: %s\n", Tcl_GetStringResult(interp));
Tcl_DeleteInterp(interp);
return(NULL);
}
tcl_ret = Tcl_Eval(interp, "package ifneeded sha1 1.0 [list load {} sha1]");
if (tcl_ret != TCL_OK) {
fprintf(stderr, "Unable to initialize Tcl SHA1. Aborting.\n");
fprintf(stderr, "Tcl Error is: %s\n", Tcl_GetStringResult(interp));
Tcl_DeleteInterp(interp);
return(NULL);
}
tcl_ret = Tcl_Eval(interp, "package ifneeded appfsd 1.0 [list load {} appfsd]");
if (tcl_ret != TCL_OK) {
fprintf(stderr, "Unable to initialize Tcl AppFS Package. Aborting.\n");
fprintf(stderr, "Tcl Error is: %s\n", Tcl_GetStringResult(interp));
Tcl_DeleteInterp(interp);
return(NULL);
}
/*
* Load the "appfsd.tcl" script, which is "compiled" into a C header
* so that it does not need to exist on the filesystem and can be
* directly evaluated.
*/
tcl_ret = Tcl_Eval(interp, ""
#include "appfsd.tcl.h"
"");
if (tcl_ret != TCL_OK) {
fprintf(stderr, "Unable to initialize Tcl AppFS script. Aborting.\n");
fprintf(stderr, "Tcl Error is: %s\n", Tcl_GetStringResult(interp));
Tcl_DeleteInterp(interp);
return(NULL);
}
/*
* Set global variables from C to Tcl
*/
if (Tcl_SetVar(interp, "::appfs::cachedir", cachedir, TCL_GLOBAL_ONLY) == NULL) {
fprintf(stderr, "Unable to set cache directory. This should never fail.\n");
Tcl_DeleteInterp(interp);
return(NULL);
}
/*
* Initialize the "appfsd.tcl" environment, which must be done after
* global variables are set.
*/
tcl_ret = Tcl_Eval(interp, "::appfs::init");
if (tcl_ret != TCL_OK) {
fprintf(stderr, "Unable to initialize Tcl AppFS script (::appfs::init). Aborting.\n");
fprintf(stderr, "Tcl Error is: %s\n", Tcl_GetStringResult(interp));
Tcl_DeleteInterp(interp);
return(NULL);
}
/*
* Hide some Tcl commands that we do not care to use and which may
* slow down run-time operations.
*/
Tcl_HideCommand(interp, "auto_load_index", "auto_load_index");
Tcl_HideCommand(interp, "unknown", "unknown");
/*
* Return the completely initialized interpreter
*/
return(interp);
}
/*
* Return the thread-specific Tcl interpreter, creating it if needed
*/
static Tcl_Interp *appfs_TclInterp(void) {
Tcl_Interp *interp;
int pthread_ret;
interp = pthread_getspecific(interpKey);
if (interp == NULL) {
interp = appfs_create_TclInterp();
if (interp == NULL) {
return(NULL);
}
pthread_ret = pthread_setspecific(interpKey, interp);
if (pthread_ret != 0) {
Tcl_DeleteInterp(interp);
return(NULL);
}
}
return(interp);
}
/*
* Evaluate a Tcl script constructed by concatenating a bunch of C strings
* together.
*/
static int appfs_Tcl_Eval(Tcl_Interp *interp, int objc, const char *cmd, ...) {
Tcl_Obj **objv;
const char *arg;
va_list argp;
int retval;
int i;
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if (retval != TCL_OK) {
APPFS_DEBUG("Tcl command failed, ::errorInfo contains: %s\n", Tcl_GetVar(interp, "::errorInfo", 0));
}
return(retval);
}
static void appfs_update_index(const char *hostname) {
Tcl_Interp *interp;
int tcl_ret;
APPFS_DEBUG("Enter: hostname = %s", hostname);
interp = pthread_getspecific(interpKey);
if (interp == NULL) {
interp = appfs_create_TclInterp(globalThread.cachedir);
if (interp == NULL) {
return;
}
pthread_setspecific(interpKey, interp);
}
tcl_ret = appfs_Tcl_Eval(interp, 2, "::appfs::getindex", hostname);
if (tcl_ret != TCL_OK) {
APPFS_DEBUG("Call to ::appfs::getindex failed: %s", Tcl_GetStringResult(interp));
return;
}
return;
}
static const char *appfs_getfile(const char *hostname, const char *sha1) {
Tcl_Interp *interp;
char *retval;
int tcl_ret;
interp = pthread_getspecific(interpKey);
if (interp == NULL) {
interp = appfs_create_TclInterp(globalThread.cachedir);
if (interp == NULL) {
return(NULL);
}
pthread_setspecific(interpKey, interp);
}
tcl_ret = appfs_Tcl_Eval(interp, 3, "::appfs::download", hostname, sha1);
if (tcl_ret != TCL_OK) {
APPFS_DEBUG("Call to ::appfs::download failed: %s", Tcl_GetStringResult(interp));
return(NULL);
}
retval = strdup(Tcl_GetStringResult(interp));
return(retval);
}
static void appfs_update_manifest(const char *hostname, const char *sha1) {
Tcl_Interp *interp;
int tcl_ret;
interp = pthread_getspecific(interpKey);
if (interp == NULL) {
interp = appfs_create_TclInterp(globalThread.cachedir);
if (interp == NULL) {
return;
}
pthread_setspecific(interpKey, interp);
}
tcl_ret = appfs_Tcl_Eval(interp, 3, "::appfs::getpkgmanifest", hostname, sha1);
if (tcl_ret != TCL_OK) {
APPFS_DEBUG("Call to ::appfs::getpkgmanifest failed: %s", Tcl_GetStringResult(interp));
return;
}
return;
}
#define appfs_free_list_type(id, type) static void appfs_free_list_ ## id(type *head) { \
type *obj, *next; \
for (obj = head; obj; obj = next) { \
next = obj->_next; \
ckfree((void *) obj); \
} \
}
appfs_free_list_type(children, struct appfs_children)
static uid_t appfs_get_fsuid(void) {
struct fuse_context *ctx;
ctx = fuse_get_context();
if (ctx == NULL) {
return(1);
}
return(ctx->uid);
}
static const char *appfs_get_homedir(uid_t fsuid) {
struct passwd entry, *result;
struct stat stbuf;
char buf[1024], *retval;
int gpu_ret, stat_ret;
gpu_ret = getpwuid_r(fsuid, &entry, buf, sizeof(buf), &result);
if (gpu_ret != 0) {
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if (retval != TCL_OK) {
APPFS_DEBUG("Tcl command failed, ::errorInfo contains: %s\n", Tcl_GetVar(interp, "::errorInfo", 0));
}
return(retval);
}
/*
* AppFS: Request that a host's package index be updated locally
*/
static void appfs_update_index(const char *hostname) {
Tcl_Interp *interp;
int tcl_ret;
APPFS_DEBUG("Enter: hostname = %s", hostname);
interp = appfs_TclInterp();
if (interp == NULL) {
return;
}
tcl_ret = appfs_Tcl_Eval(interp, 2, "::appfs::getindex", hostname);
if (tcl_ret != TCL_OK) {
APPFS_DEBUG("Call to ::appfs::getindex failed: %s", Tcl_GetStringResult(interp));
return;
}
return;
}
/*
* AppFS: Get a SHA1 from a host
* Returns a local file name, or NULL if it cannot be fetched
*/
static const char *appfs_getfile(const char *hostname, const char *sha1) {
Tcl_Interp *interp;
char *retval;
int tcl_ret;
interp = appfs_TclInterp();
if (interp == NULL) {
return(NULL);
}
tcl_ret = appfs_Tcl_Eval(interp, 3, "::appfs::download", hostname, sha1);
if (tcl_ret != TCL_OK) {
APPFS_DEBUG("Call to ::appfs::download failed: %s", Tcl_GetStringResult(interp));
return(NULL);
}
retval = strdup(Tcl_GetStringResult(interp));
return(retval);
}
/*
* AppFS: Update the manifest for a specific package (by the package SHA1) on
* a given host
*/
static void appfs_update_manifest(const char *hostname, const char *sha1) {
Tcl_Interp *interp;
int tcl_ret;
interp = appfs_TclInterp();
if (interp == NULL) {
return;
}
tcl_ret = appfs_Tcl_Eval(interp, 3, "::appfs::getpkgmanifest", hostname, sha1);
if (tcl_ret != TCL_OK) {
APPFS_DEBUG("Call to ::appfs::getpkgmanifest failed: %s", Tcl_GetStringResult(interp));
return;
}
return;
}
/*
* Determine the UID for the user making the current FUSE filesystem request.
* This will be used to lookup the user's home directory so we can search for
* locally modified files.
*/
static uid_t appfs_get_fsuid(void) {
struct fuse_context *ctx;
ctx = fuse_get_context();
if (ctx == NULL) {
/* Unable to lookup user for some reason */
/* Return an unprivileged user ID */
return(1);
}
return(ctx->uid);
}
/*
* Look up the home directory for a given UID
* Returns a C string containing the user's home directory or NULL if
* the user's home directory does not exist or is not correctly
* configured
*/
static char *appfs_get_homedir(uid_t fsuid) {
struct passwd entry, *result;
struct stat stbuf;
char buf[1024], *retval;
int gpu_ret, stat_ret;
gpu_ret = getpwuid_r(fsuid, &entry, buf, sizeof(buf), &result);
if (gpu_ret != 0) {
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result->pw_dir,
(unsigned long long) stbuf.st_uid
);
return(NULL);
}
retval = sqlite3_mprintf("%s", result->pw_dir);
return(retval);
}
static int appfs_getpackage_name_cb(void *_package_name, int columns, char **values, char **names) {
char **package_name;
if (columns != 1) {
return(1);
}
package_name = _package_name;
*package_name = sqlite3_mprintf("%s", values[0]);
return(0);
}
static char *appfs_getpackage_name(const char *hostname, const char *package_hash) {
char *sql;
int sqlite_ret;
char *package_name = NULL;
sql = sqlite3_mprintf("SELECT package FROM packages WHERE hostname = %Q AND sha1 = %Q LIMIT 1;", hostname, package_hash);
if (sql == NULL) {
APPFS_DEBUG("Call to sqlite3_mprintf failed.");
return(sqlite3_mprintf("%s", "unknown-package-name"));
}
sqlite_ret = sqlite3_exec(globalThread.db, sql, appfs_getpackage_name_cb, &package_name, NULL);
sqlite3_free(sql);
if (sqlite_ret != SQLITE_OK) {
APPFS_DEBUG("Call to sqlite3_exec failed.");
return(sqlite3_mprintf("%s", "unknown-package-name"));
}
return(package_name);
}
static struct appfs_children *appfs_getchildren_fs(struct appfs_children *in_children, const char *fspath) {
APPFS_DEBUG("Searching %s", fspath);
return(in_children);
}
static int appfs_getchildren_cb(void *_head, int columns, char **values, char **names) {
struct appfs_children **head_p, *obj;
head_p = _head;
obj = (void *) ckalloc(sizeof(*obj));
snprintf(obj->name, sizeof(obj->name), "%s", values[0]);
if (*head_p == NULL) {
obj->counter = 0;
} else {
obj->counter = (*head_p)->counter + 1;
}
obj->_next = *head_p;
*head_p = obj;
return(0);
}
static struct appfs_children *appfs_getchildren(const char *hostname, const char *package_hash, const char *path, int *children_count_p) {
struct appfs_children *head = NULL;
char *sql, *filebuf, *homedir = NULL;
int sqlite_ret;
uid_t fsuid;
if (children_count_p == NULL) {
return(NULL);
}
appfs_update_index(hostname);
appfs_update_manifest(hostname, package_hash);
sql = sqlite3_mprintf("SELECT file_name FROM files WHERE package_sha1 = %Q AND file_directory = %Q;", package_hash, path);
if (sql == NULL) {
APPFS_DEBUG("Call to sqlite3_mprintf failed.");
return(NULL);
}
APPFS_DEBUG("SQL: %s", sql);
sqlite_ret = sqlite3_exec(globalThread.db, sql, appfs_getchildren_cb, &head, NULL);
sqlite3_free(sql);
if (sqlite_ret != SQLITE_OK) {
APPFS_DEBUG("Call to sqlite3_exec failed.");
appfs_free_list_children(head);
return(NULL);
}
if (globalThread.options.writable) {
/* Determine user of process accessing this file */
fsuid = appfs_get_fsuid();
/* Check filesystem paths for updated files */
/** Check the global directory (/etc) **/
filebuf = sqlite3_mprintf("/etc/appfs/%z@%s/%s", appfs_getpackage_name(hostname, package_hash), hostname, path);
if (filebuf == NULL) {
APPFS_DEBUG("Call to sqlite3_mprintf failed.");
return(NULL);
}
head = appfs_getchildren_fs(head, filebuf);
sqlite3_free(filebuf);
/** Check the user's directory, if we are not root **/
if (fsuid != 0) {
homedir = (char *) appfs_get_homedir(fsuid);
}
if (homedir != NULL) {
filebuf = sqlite3_mprintf("%z/.appfs/%z@%s/%s", homedir, appfs_getpackage_name(hostname, package_hash), hostname, path);
if (filebuf == NULL) {
APPFS_DEBUG("Call to sqlite3_mprintf failed.");
return(NULL);
}
head = appfs_getchildren_fs(head, filebuf);
sqlite3_free(filebuf);
}
}
if (head != NULL) {
*children_count_p = head->counter + 1;
} else {
*children_count_p = 0;
}
return(head);
}
static int appfs_sqlite3_query_cb(void *_cb_handle, int columns, char **values, char **names) {
struct appfs_sqlite3_query_cb_handle *cb_handle;
struct appfs_children *obj;
cb_handle = _cb_handle;
obj = (void *) ckalloc(sizeof(*obj));
switch (cb_handle->argc) {
case 1:
snprintf(obj->name, sizeof(obj->name), cb_handle->fmt, values[0]);
break;
case 2:
snprintf(obj->name, sizeof(obj->name), cb_handle->fmt, values[0], values[1]);
break;
case 3:
snprintf(obj->name, sizeof(obj->name), cb_handle->fmt, values[0], values[1], values[2]);
break;
case 4:
snprintf(obj->name, sizeof(obj->name), cb_handle->fmt, values[0], values[1], values[2], values[3]);
break;
}
if (cb_handle->head == NULL) {
obj->counter = 0;
} else {
obj->counter = cb_handle->head->counter + 1;
}
obj->_next = cb_handle->head;
cb_handle->head = obj;
return(0);
}
static struct appfs_children *appfs_sqlite3_query(char *sql, int argc, const char *fmt, int *results_count_p) {
struct appfs_sqlite3_query_cb_handle cb_handle;
int sqlite_ret;
if (results_count_p == NULL) {
return(NULL);
}
if (sql == NULL) {
APPFS_DEBUG("Call to sqlite3_mprintf probably failed.");
return(NULL);
}
if (fmt == NULL) {
fmt = "%s";
}
cb_handle.head = NULL;
cb_handle.argc = argc;
cb_handle.fmt = fmt;
APPFS_DEBUG("SQL: %s", sql);
sqlite_ret = sqlite3_exec(globalThread.db, sql, appfs_sqlite3_query_cb, &cb_handle, NULL);
sqlite3_free(sql);
if (sqlite_ret != SQLITE_OK) {
APPFS_DEBUG("Call to sqlite3_exec failed.");
return(NULL);
}
if (cb_handle.head != NULL) {
*results_count_p = cb_handle.head->counter + 1;
}
return(cb_handle.head);
}
static int appfs_lookup_package_hash_cb(void *_retval, int columns, char **values, char **names) {
char **retval = _retval;
*retval = strdup(values[0]);
return(0);
}
static char *appfs_lookup_package_hash(const char *hostname, const char *package, const char *os, const char *cpuArch, const char *version) {
char *sql;
char *retval = NULL;
int sqlite_ret;
appfs_update_index(hostname);
sql = sqlite3_mprintf("SELECT sha1 FROM packages WHERE hostname = %Q AND package = %Q AND os = %Q AND cpuArch = %Q AND version = %Q;",
hostname,
package,
os,
cpuArch,
version
);
if (sql == NULL) {
APPFS_DEBUG("Call to sqlite3_mprintf failed.");
return(NULL);
}
APPFS_DEBUG("SQL: %s", sql);
sqlite_ret = sqlite3_exec(globalThread.db, sql, appfs_lookup_package_hash_cb, &retval, NULL);
sqlite3_free(sql);
if (sqlite_ret != SQLITE_OK) {
APPFS_DEBUG("Call to sqlite3_exec failed.");
return(NULL);
}
return(retval);
}
static int appfs_getfileinfo_cb(void *_pathinfo, int columns, char **values, char **names) {
struct appfs_pathinfo *pathinfo = _pathinfo;
const char *type, *time, *source, *size, *perms, *sha1, *rowid;
type = values[0];
time = values[1];
source = values[2];
size = values[3];
perms = values[4];
sha1 = values[5];
rowid = values[6];
pathinfo->time = strtoull(time, NULL, 10);
/* Package file inodes start at 2^32, fake inodes are before then */
pathinfo->inode = strtoull(rowid, NULL, 10) + 4294967296ULL;
if (strcmp(type, "file") == 0) {
pathinfo->type = APPFS_PATHTYPE_FILE;
if (!size) {
size = "0";
}
if (!perms) {
perms = "";
}
if (!sha1) {
sha1 = "";
}
pathinfo->typeinfo.file.size = strtoull(size, NULL, 10);
snprintf(pathinfo->typeinfo.file.sha1, sizeof(pathinfo->typeinfo.file.sha1), "%s", sha1);
if (strcmp(perms, "x") == 0) {
pathinfo->typeinfo.file.executable = 1;
} else {
pathinfo->typeinfo.file.executable = 0;
}
return(0);
}
if (strcmp(type, "directory") == 0) {
pathinfo->type = APPFS_PATHTYPE_DIRECTORY;
pathinfo->typeinfo.dir.childcount = 0;
return(0);
}
if (strcmp(type, "symlink") == 0) {
pathinfo->type = APPFS_PATHTYPE_SYMLINK;
pathinfo->typeinfo.dir.childcount = 0;
if (!source) {
source = ".BADLINK";
}
pathinfo->typeinfo.symlink.size = strlen(source);
snprintf(pathinfo->typeinfo.symlink.source, sizeof(pathinfo->typeinfo.symlink.source), "%s", source);
return(0);
}
return(0);
/* Until this is used, prevent the compiler from complaining */
source = source;
}
static int appfs_getfileinfo(const char *hostname, const char *package_hash, const char *_path, struct appfs_pathinfo *pathinfo) {
char *directory, *file, *path;
char *sql;
int sqlite_ret;
if (pathinfo == NULL) {
return(-EIO);
}
appfs_update_index(hostname);
appfs_update_manifest(hostname, package_hash);
path = strdup(_path);
directory = path;
file = strrchr(path, '/');
if (file == NULL) {
file = path;
directory = "";
} else {
*file = '\0';
file++;
}
sql = sqlite3_mprintf("SELECT type, time, source, size, perms, file_sha1, rowid FROM files WHERE package_sha1 = %Q AND file_directory = %Q AND file_name = %Q;", package_hash, directory, file);
if (sql == NULL) {
APPFS_DEBUG("Call to sqlite3_mprintf failed.");
free(path);
return(-EIO);
}
free(path);
pathinfo->type = APPFS_PATHTYPE_INVALID;
APPFS_DEBUG("SQL: %s", sql);
sqlite_ret = sqlite3_exec(globalThread.db, sql, appfs_getfileinfo_cb, pathinfo, NULL);
sqlite3_free(sql);
if (sqlite_ret != SQLITE_OK) {
APPFS_DEBUG("Call to sqlite3_exec failed.");
return(-EIO);
}
if (pathinfo->type == APPFS_PATHTYPE_INVALID) {
return(-ENOENT);
}
return(0);
}
static int appfs_get_path_info_sql(char *sql, int argc, const char *fmt, struct appfs_pathinfo *pathinfo, struct appfs_children **children) {
struct appfs_children *node, *dir_children, *dir_child;
int dir_children_count = 0;
dir_children = appfs_sqlite3_query(sql, argc, fmt, &dir_children_count);
if (dir_children == NULL || dir_children_count == 0) {
return(-ENOENT);
}
/* Request for a single hostname */
pathinfo->type = APPFS_PATHTYPE_DIRECTORY;
pathinfo->typeinfo.dir.childcount = dir_children_count;
pathinfo->time = globalThread.boottime;
if (children) {
for (dir_child = dir_children; dir_child; dir_child = dir_child->_next) {
node = (void *) ckalloc(sizeof(*node));
node->_next = *children;
strcpy(node->name, dir_child->name);
*children = node;
}
}
appfs_free_list_children(dir_children);
return(0);
}
static int appfs_add_path_child(const char *name, struct appfs_pathinfo *pathinfo, struct appfs_children **children) {
struct appfs_children *new_child;
pathinfo->typeinfo.dir.childcount++;
if (children) {
new_child = (void *) ckalloc(sizeof(*new_child));
new_child->_next = *children;
snprintf(new_child->name, sizeof(new_child->name), "%s", name);
*children = new_child;
}
return(0);
}
/* Generate an inode for a given path */
static long long appfs_get_path_inode(const char *path) {
long long retval;
const char *p;
retval = 10;
for (p = path; *p; p++) {
retval %= 4290960290ULL;
retval += *p;
retval <<= 7;
}
retval += 10;
retval %= 4294967296ULL;
return(retval);
}
/* Get information about a path, and optionally list children */
static int appfs_get_path_info(const char *_path, struct appfs_pathinfo *pathinfo, struct appfs_children **children) {
struct appfs_children *dir_children;
char *hostname, *packagename, *os_cpuArch, *os, *cpuArch, *version;
char *path, *path_s;
char *package_hash;
char *sql;
int files_count;
int fileinfo_ret, retval;
/* Initialize return */
if (children) {
*children = NULL;
}
/* Verify that this is a valid request */
if (_path == NULL) {
return(-ENOENT);
}
if (_path[0] != '/') {
return(-ENOENT);
}
/* Note that this is not a "real" directory from a package */
pathinfo->packaged = 0;
if (_path[1] == '\0') {
/* Request for the root directory */
pathinfo->hostname[0] = '\0';
pathinfo->inode = 1;
sql = sqlite3_mprintf("SELECT DISTINCT hostname FROM packages;");
retval = appfs_get_path_info_sql(sql, 1, NULL, pathinfo, children);
/* The root directory always exists, even if it has no subordinates */
if (retval != 0) {
pathinfo->type = APPFS_PATHTYPE_DIRECTORY;
pathinfo->typeinfo.dir.childcount = 0;
pathinfo->time = globalThread.boottime;
retval = 0;
}
return(retval);
}
path = strdup(_path);
path_s = path;
pathinfo->inode = appfs_get_path_inode(path);
hostname = path + 1;
packagename = strchr(hostname, '/');
if (packagename != NULL) {
*packagename = '\0';
packagename++;
}
snprintf(pathinfo->hostname, sizeof(pathinfo->hostname), "%s", hostname);
if (packagename == NULL) {
appfs_update_index(hostname);
sql = sqlite3_mprintf("SELECT DISTINCT package FROM packages WHERE hostname = %Q;", hostname);
free(path_s);
return(appfs_get_path_info_sql(sql, 1, NULL, pathinfo, children));
}
os_cpuArch = strchr(packagename, '/');
if (os_cpuArch != NULL) {
*os_cpuArch = '\0';
os_cpuArch++;
}
if (os_cpuArch == NULL) {
appfs_update_index(hostname);
sql = sqlite3_mprintf("SELECT DISTINCT os, cpuArch FROM packages WHERE hostname = %Q AND package = %Q;", hostname, packagename);
free(path_s);
retval = appfs_get_path_info_sql(sql, 2, "%s-%s", pathinfo, children);
if (retval != 0) {
return(retval);
}
appfs_add_path_child("platform", pathinfo, children);
return(retval);
}
version = strchr(os_cpuArch, '/');
if (version != NULL) {
*version = '\0';
version++;
}
os = os_cpuArch;
cpuArch = strchr(os_cpuArch, '-');
if (cpuArch) {
*cpuArch = '\0';
cpuArch++;
} else {
cpuArch = "";
}
if (version == NULL) {
if (strcmp(os, "platform") == 0 && strcmp(cpuArch, "") == 0) {
pathinfo->type = APPFS_PATHTYPE_SYMLINK;
pathinfo->time = globalThread.boottime;
pathinfo->typeinfo.dir.childcount = 0;
pathinfo->typeinfo.symlink.size = strlen(globalThread.platform);
snprintf(pathinfo->typeinfo.symlink.source, sizeof(pathinfo->typeinfo.symlink.source), "%s", globalThread.platform);
free(path_s);
return(0);
}
/* Request for version list for a package on an OS/CPU */
appfs_update_index(hostname);
sql = sqlite3_mprintf("SELECT DISTINCT version FROM packages WHERE hostname = %Q AND package = %Q AND os = %Q and cpuArch = %Q;", hostname, packagename, os, cpuArch);
free(path_s);
return(appfs_get_path_info_sql(sql, 1, NULL, pathinfo, children));
}
path = strchr(version, '/');
if (path == NULL) {
path = "";
} else {
*path = '\0';
path++;
}
/* Request for a file in a specific package */
pathinfo->packaged = 1;
APPFS_DEBUG("Requesting information for hostname = %s, package = %s, os = %s, cpuArch = %s, version = %s, path = %s",
hostname, packagename, os, cpuArch, version, path
);
package_hash = appfs_lookup_package_hash(hostname, packagename, os, cpuArch, version);
if (package_hash == NULL) {
free(path_s);
return(-ENOENT);
}
APPFS_DEBUG(" ... which hash a hash of %s", package_hash);
appfs_update_manifest(hostname, package_hash);
if (strcmp(path, "") == 0) {
pathinfo->type = APPFS_PATHTYPE_DIRECTORY;
pathinfo->time = globalThread.boottime;
} else {
fileinfo_ret = appfs_getfileinfo(hostname, package_hash, path, pathinfo);
if (fileinfo_ret != 0) {
free(path_s);
return(fileinfo_ret);
}
}
if (pathinfo->type == APPFS_PATHTYPE_DIRECTORY) {
dir_children = appfs_getchildren(hostname, package_hash, path, &files_count);
if (dir_children != NULL) {
pathinfo->typeinfo.dir.childcount = files_count;
}
if (children) {
*children = dir_children;
} else {
appfs_free_list_children(dir_children);
}
}
free(path_s);
return(0);
}
static int appfs_fuse_readlink(const char *path, char *buf, size_t size) {
struct appfs_pathinfo pathinfo;
int res = 0;
APPFS_DEBUG("Enter (path = %s, ...)", path);
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result->pw_dir,
(unsigned long long) stbuf.st_uid
);
return(NULL);
}
retval = strdup(result->pw_dir);
return(retval);
}
/*
* Tcl interface to get the home directory for the user making the "current"
* FUSE I/O request
*/
static int tcl_appfs_get_homedir(ClientData cd, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]) {
char *homedir;
if (objc != 1) {
Tcl_WrongNumArgs(interp, 1, objv, NULL);
return(TCL_ERROR);
}
homedir = appfs_get_homedir(appfs_get_fsuid());
if (homedir == NULL) {
return(TCL_ERROR);
}
Tcl_SetObjResult(interp, Tcl_NewStringObj(homedir, -1));
free(homedir);
return(TCL_OK);
}
/*
* Generate an inode for a given path. The inode should be computed in such
* a way that it is unlikely to be duplicated and remains the same for a given
* file
*/
static long long appfs_get_path_inode(const char *path) {
long long retval;
const char *p;
retval = 10;
for (p = path; *p; p++) {
retval %= 4290960290ULL;
retval += *p;
retval <<= 7;
}
retval += 10;
retval %= 4294967296ULL;
return(retval);
}
/* Get information about a path, and optionally list children */
static int appfs_get_path_info(const char *_path, struct appfs_pathinfo *pathinfo, struct appfs_children **children) {
}
static int appfs_fuse_readlink(const char *path, char *buf, size_t size) {
struct appfs_pathinfo pathinfo;
int res = 0;
APPFS_DEBUG("Enter (path = %s, ...)", path);
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}
read_ret = read(fi->fh, buf, size);
return(read_ret);
}
static struct fuse_operations appfs_oper = {
.getattr = appfs_fuse_getattr,
.readdir = appfs_fuse_readdir,
.readlink = appfs_fuse_readlink,
.open = appfs_fuse_open,
.release = appfs_fuse_close,
.read = appfs_fuse_read
};
int main(int argc, char **argv) {
const char *cachedir = APPFS_CACHEDIR;
char dbfilename[1024];
int pthread_ret, snprintf_ret, sqlite_ret;
globalThread.cachedir = cachedir;
globalThread.boottime = time(NULL);
globalThread.platform = "linux-x86_64";
globalThread.options.writable = 1;
pthread_ret = pthread_key_create(&interpKey, NULL);
if (pthread_ret != 0) {
fprintf(stderr, "Unable to create TSD key for Tcl. Aborting.\n");
return(1);
}
snprintf_ret = snprintf(dbfilename, sizeof(dbfilename), "%s/%s", cachedir, "cache.db");
if (snprintf_ret >= sizeof(dbfilename)) {
fprintf(stderr, "Unable to set database filename. Aborting.\n");
return(1);
}
sqlite_ret = sqlite3_open(dbfilename, &globalThread.db);
if (sqlite_ret != SQLITE_OK) {
fprintf(stderr, "Unable to open database: %s\n", dbfilename);
return(1);
}
return(fuse_main(argc, argv, &appfs_oper, NULL));
}
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}
read_ret = read(fi->fh, buf, size);
return(read_ret);
}
/*
* SQLite3 mode: Execute raw SQL and return success or failure
*/
static int appfs_sqlite3(const char *sql) {
Tcl_Interp *interp;
const char *sql_ret;
int tcl_ret;
interp = appfs_create_TclInterp();
if (interp == NULL) {
fprintf(stderr, "Unable to create a Tcl interpreter. Aborting.\n");
return(1);
}
tcl_ret = appfs_Tcl_Eval(interp, 5, "::appfs::db", "eval", sql, "row", "unset -nocomplain row(*); parray row; puts \"----\"");
sql_ret = Tcl_GetStringResult(interp);
if (tcl_ret != TCL_OK) {
fprintf(stderr, "[error] %s\n", sql_ret);
return(1);
}
if (sql_ret && sql_ret[0] != '\0') {
printf("%s\n", sql_ret);
}
return(0);
}
/*
* Tcl mode: Execute raw Tcl and return success or failure
*/
static int appfs_tcl(const char *tcl) {
Tcl_Interp *interp;
const char *tcl_result;
int tcl_ret;
interp = appfs_create_TclInterp();
if (interp == NULL) {
fprintf(stderr, "Unable to create a Tcl interpreter. Aborting.\n");
return(1);
}
tcl_ret = Tcl_Eval(interp, tcl);
tcl_result = Tcl_GetStringResult(interp);
if (tcl_ret != TCL_OK) {
fprintf(stderr, "[error] %s\n", tcl_result);
return(1);
}
if (tcl_result && tcl_result[0] != '\0') {
printf("%s\n", tcl_result);
}
return(0);
}
/*
* AppFSd Package for Tcl:
* Bridge for I/O operations to request information about the current
* transaction
*/
static int Appfsd_Init(Tcl_Interp *interp) {
#ifdef USE_TCL_STUBS
if (Tcl_InitStubs(interp, TCL_VERSION, 0) == 0L) {
return(TCL_ERROR);
}
#endif
Tcl_CreateObjCommand(interp, "appfsd::get_homedir", tcl_appfs_get_homedir, NULL, NULL);
Tcl_PkgProvide(interp, "appfsd", "1.0");
return(TCL_OK);
}
/*
* FUSE operations structure
*/
static struct fuse_operations appfs_operations = {
.getattr = appfs_fuse_getattr,
.readdir = appfs_fuse_readdir,
.readlink = appfs_fuse_readlink,
.open = appfs_fuse_open,
.release = appfs_fuse_close,
.read = appfs_fuse_read
};
/*
* FUSE option parsing callback
*/
static int appfs_fuse_opt_cb(void *data, const char *arg, int key, struct fuse_args *outargs) {
static seen_cachedir = 0;
if (key == FUSE_OPT_KEY_NONOPT && seen_cachedir == 0) {
seen_cachedir = 1;
globalThread.cachedir = strdup(arg);
return(0);
}
return(1);
}
/*
* Entry point into this program.
*/
int main(int argc, char **argv) {
struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
int pthread_ret;
/*
* Skip passed program name
*/
if (argc == 0 || argv == NULL) {
return(1);
}
argc--;
argv++;
/*
* Set global variables, these should be configuration options.
*/
globalThread.cachedir = APPFS_CACHEDIR;
globalThread.options.writable = 1;
/*
* Set global variable for "boot time" to set a time on directories
* that we fake.
*/
globalThread.boottime = time(NULL);
/*
* Register "sha1" and "appfsd" package with libtcl so that any new
* interpreters created (which are done dynamically by FUSE) can have
* the appropriate configuration done automatically.
*/
Tcl_StaticPackage(NULL, "sha1", Sha1_Init, NULL);
Tcl_StaticPackage(NULL, "appfsd", Appfsd_Init, NULL);
/*
* Create a thread-specific-data (TSD) key for each thread to refer
* to its own Tcl interpreter. Tcl interpreters must be unique per
* thread and new threads are dynamically created by FUSE.
*/
pthread_ret = pthread_key_create(&interpKey, NULL);
if (pthread_ret != 0) {
fprintf(stderr, "Unable to create TSD key for Tcl. Aborting.\n");
return(1);
}
/*
* Manually specify cache directory, without FUSE callback
* This option only works when not using FUSE, since we
* do not process it with FUSEs option processing.
*/
if (argc >= 2) {
if (strcmp(argv[0], "--cachedir") == 0) {
globalThread.cachedir = strdup(argv[1]);
argc -= 2;
argv += 2;
}
}
/*
* SQLite3 mode, for running raw SQL against the cache database
*/
if (argc == 2 && strcmp(argv[0], "--sqlite3") == 0) {
return(appfs_sqlite3(argv[1]));
}
/*
* Tcl mode, for running raw Tcl in the same environment AppFSd would
* run code.
*/
if (argc == 2 && strcmp(argv[0], "--tcl") == 0) {
return(appfs_tcl(argv[1]));
}
/*
* Add FUSE arguments which we always supply
*/
fuse_opt_parse(&args, NULL, NULL, appfs_fuse_opt_cb);
fuse_opt_add_arg(&args, "-odefault_permissions,fsname=appfs,subtype=appfsd,use_ino,kernel_cache,entry_timeout=60,attr_timeout=3600,intr,big_writes");
if (getuid() == 0) {
fuse_opt_parse(&args, NULL, NULL, NULL);
fuse_opt_add_arg(&args, "-oallow_other");
}
/*
* Enter the FUSE main loop -- this will process any arguments
* and start servicing requests.
*/
return(fuse_main(args.argc, args.argv, &appfs_operations, NULL));
}
|