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Comment:Updated to create a Tcl interpreter at startup before starting FUSE loop to catch Tcl errors early
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SHA1: 3c900017015165d4bbe10e188fa67c7b1a506d09
User & Date: rkeene on 2014-11-09 02:09:55
Other Links: branch diff | manifest | tags
Context
2014-11-09
02:13
Updated to create directory to store local file check-in: f2d710b7dc user: rkeene tags: tcl-ops
02:09
Updated to create a Tcl interpreter at startup before starting FUSE loop to catch Tcl errors early check-in: 3c90001701 user: rkeene tags: tcl-ops
2014-11-08
19:33
Removed SQLite dependency check-in: d74c945fc0 user: rkeene tags: tcl-ops
Changes
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Modified appfsd.c from [c5ca9c2598] to [ade95f924e].

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		} symlink;
	} typeinfo;
};

/*
 * Create a new Tcl interpreter and completely initialize it
 */
static Tcl_Interp *appfs_create_TclInterp(void) {
static Tcl_Interp *appfs_create_TclInterp(char **error_string) {
	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");

		if (error_string) {
			*error_string = strdup("Unable to create Tcl interpreter.");
		}

		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));

		if (error_string) {
			*error_string = strdup(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));

		if (error_string) {
			*error_string = strdup(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));

		if (error_string) {
			*error_string = strdup(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));

		if (error_string) {
			*error_string = strdup(Tcl_GetStringResult(interp));
		}

		Tcl_DeleteInterp(interp);

		return(NULL);
	}

	/*
	 * Set global variables from C to Tcl
	 */
	if (Tcl_SetVar(interp, "::appfs::cachedir", appfs_cachedir, TCL_GLOBAL_ONLY) == NULL) {
		fprintf(stderr, "Unable to set cache directory.  This should never fail.\n");

		if (error_string) {
			*error_string = strdup(Tcl_GetStringResult(interp));
		}

		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));

		if (error_string) {
			*error_string = strdup(Tcl_GetStringResult(interp));
		}

		Tcl_DeleteInterp(interp);

		return(NULL);
	}

	/*
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 */
static Tcl_Interp *appfs_TclInterp(void) {
	Tcl_Interp *interp;
	int pthread_ret;

	interp = pthread_getspecific(interpKey);
	if (interp == NULL) {
		interp = appfs_create_TclInterp();
		interp = appfs_create_TclInterp(NULL);

		if (interp == NULL) {
			return(NULL);
		}

		pthread_ret = pthread_setspecific(interpKey, interp);
		if (pthread_ret != 0) {
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 * 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();
	interp = appfs_create_TclInterp(NULL);
	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 \"----\"");
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 * 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();
	interp = appfs_create_TclInterp(NULL);
	if (interp == NULL) {
		fprintf(stderr, "Unable to create a Tcl interpreter.  Aborting.\n");

		return(1);
	}

	tcl_ret = Tcl_Eval(interp, tcl);
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	return(1);
}

/*
 * Entry point into this program.
 */
int main(int argc, char **argv) {
	Tcl_Interp *test_interp;
	char *test_interp_error;
	struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
	int pthread_ret;

	/*
	 * Skip passed program name
	 */
	if (argc == 0 || argv == NULL) {
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	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");
	}

	/*
	 * Create a Tcl interpreter just to verify that things are in working 
	 * order before we become a daemon.
	 */
	test_interp = appfs_create_TclInterp(&test_interp_error);
	if (test_interp == NULL) {
		if (test_interp_error == NULL) {
			test_interp_error = "Unknown error";
		}

		fprintf(stderr, "Unable to initialize Tcl interpreter for AppFSd:\n");
		fprintf(stderr, "%s", test_interp_error);

		return(1);
	}
	Tcl_DeleteInterp(test_interp);

	/*
	 * Enter the FUSE main loop -- this will process any arguments
	 * and start servicing requests.
	 */
	appfs_fuse_started = 1;
	return(fuse_main(args.argc, args.argv, &appfs_operations, NULL));
}