| -rw-r--r-- | quickexec/johns/README | 21 | ||||
| -rw-r--r-- | quickexec/johns/library.lst | 2 | ||||
| -rw-r--r-- | quickexec/johns/qinit_srv.c | 242 | ||||
| -rw-r--r-- | quickexec/johns/so_stub.c | 23 |
4 files changed, 0 insertions, 288 deletions
diff --git a/quickexec/johns/README b/quickexec/johns/README deleted file mode 100644 index 1af84dc..0000000 --- a/quickexec/johns/README +++ b/dev/null @@ -1,21 +0,0 @@ - -Compile qinit_srv.c to qinit_srv as usual -Compile your applications at shared libraries instead of as executables: - eg: gcc test.c -o test.so -shared -Make a symbolic link from qinit_srv to the name of the application: - eg: ln -s qinit_srv test -Now make sure 'test' (The symlink) and 'test.so' (the shared library version of the app) are together. -When you run ./test it will load test.so and run it just like you were running the application for real. -There will be a qinit_srv process created the first time you run a program this way. - -How it works: - -qinit_srv checks to see if there is already a server, if not it starts as a server which runs in the background as a deamon. -If it's a server it loads all the libraries listed in the library.lst file. -It then waits for signals to be sent to it which tell it to fork itself and load shared libraries and run them. -If it decides it's not the server, it sends a signal to the server to run the given command. -The server then executes a shared object file of whatever name the original process is invoked as (argv[0], the symlink trick) -The other process waits until the forked server finishes and signals the original process that it as finished and to return - - - diff --git a/quickexec/johns/library.lst b/quickexec/johns/library.lst deleted file mode 100644 index 42f310b..0000000 --- a/quickexec/johns/library.lst +++ b/dev/null @@ -1,2 +0,0 @@ -libqte.so -libqpe.so diff --git a/quickexec/johns/qinit_srv.c b/quickexec/johns/qinit_srv.c deleted file mode 100644 index 03c6cd3..0000000 --- a/quickexec/johns/qinit_srv.c +++ b/dev/null @@ -1,242 +0,0 @@ -#include <stdlib.h> -#include <stdio.h> -#include <signal.h> -#include <unistd.h> -#include <dlfcn.h> - - -#define PID_FILE "/tmp/qinit1.pid" -#define CMD_FILE "/tmp/qinit1.cmd" -#define RET_FILE "/tmp/qinit1.ret" - - -static int librariesFinishedLoading = 0; -static void **handles = NULL; -static int handleCount = 0; - - -static void savePid( void ); -static int loadPid( void ); -void saveRetVal( int retVal ); -int loadRetVal( void ); -static void saveCmd( int callingPid, int argc, char *argv[] ); -static int execCmd( void ); -static void loadLibraries( char *listFile ); -static void signalHandler( int signal ); -static void finishedHandler( int signal ); -static void cleanUpHandler( int signal ); -static void cleanUp( void ); - - -int main( int argc, char *argv[] ) { - FILE *fh; - - // See if there is already a server running - if ( ( fh = fopen( PID_FILE, "r" ) ) != NULL ) { - // There appears to already be a server running - fclose( fh ); - // Install handler that tells us when the process created by the server has finished - signal( SIGUSR2, finishedHandler ); - // Send our command to the server (saved to a file) - saveCmd( getpid(), argc, argv ); - // Send a signal to the server to run our command - kill( loadPid(), SIGUSR1 ); - // Wait for the process created by the server to terminate - for (;;) - sleep( 1 ); // Will eventually terminate when the SIGUSER2 signal is sent to us by the server - } - - // Send the server to the background - daemon( 1, 1 ); - - // Save the process number of this process somewhere (in a file) - savePid(); - - // Wait for signal used to let us know when to fork to run commands - signal( SIGUSR1, signalHandler ); - signal( SIGTERM, cleanUpHandler ); - signal( SIGINT, cleanUpHandler ); - signal( SIGABRT, cleanUpHandler ); - signal( SIGQUIT, cleanUpHandler ); - - // Iterate library list file and dynamically load at runtime - // the library files from the list - if ( argc > 1 ) - loadLibraries( argv[1] ); // Use a library list file specified from command line - else - loadLibraries( "library.lst" ); // Use the default library list file - - // Run the given command - signalHandler( SIGUSR1 ); - - // Keep waiting for signals infinitely that tell us to fork - for (;;) - wait( NULL ); // Wait for child processes to die or signals to be sent to us - - cleanUp(); - - return 0; -} - - -void cleanUp( void ) { - int i; - - // Close the shared libraries we opened - for ( i = 0; i < handleCount; i++ ) - dlclose( handles[ i ] ); - free( handles ); - - // Unlink the PID_FILE file - remove( PID_FILE ); -} - - -void savePid( void ) { - int pid = getpid(); - FILE *fh = fopen( PID_FILE, "w"); - if ( !fh ) - fputs("error writing pid to file " PID_FILE, stderr), exit(1); - fprintf( fh, "%i", pid ); - fclose( fh ); -} - - -int loadPid( void ) { - int pid; - FILE *fh = fopen( PID_FILE, "r" ); - if ( !fh ) - fputs("error loading pid from file " PID_FILE, stderr), exit(1); - fscanf( fh, "%i", &pid ); - fclose( fh ); - return pid; -} - - -void saveRetVal( int retVal ) { - FILE *fh = fopen( RET_FILE, "w"); - if ( !fh ) - fputs("error writing retVal to file " RET_FILE, stderr), exit(1); - fprintf( fh, "%i", retVal ); - fclose( fh ); -} - - -int loadRetVal( void ) { - int retVal; - FILE *fh = fopen( RET_FILE, "r" ); - if ( !fh ) - fputs("error loading retVal from file " RET_FILE, stderr), exit(1); - fscanf( fh, "%i", &retVal ); - fclose( fh ); - return retVal; -} - - -void saveCmd( int callingPid, int argc, char *argv[] ) { - int i; - FILE *fh = fopen( CMD_FILE, "w" ); - if ( !fh ) - fputs("error saving arg list to file " CMD_FILE, stderr), exit(1); - fprintf( fh, "%i\n", callingPid ); - fprintf( fh, "%s.so", argv[0] ); - for ( i = 0; i < argc; i++ ) - fprintf( fh, "\n%s", argv[i] ); - fclose( fh ); -} - - -int execCmd( void ) { - int callingPid; - char sharedObject[128]; - int argc; - char argv[128][128]; - int (*childMain)( int argc, char *argv[] ); - char *error; - void *handle; - int retVal = 0; - - // Get the name of the file to dlopen and the arguments to pass (from a file) - FILE *fh = fopen( CMD_FILE, "r" ); - fscanf( fh, "%i\n", &callingPid ); - fgets( sharedObject, 128, fh ); - sharedObject[strlen( sharedObject ) - 1] = '\0'; - for ( argc = 0; fgets( argv[argc], 128, fh ); argc++) - argv[argc][strlen( argv[argc] ) - 1] = '\0'; - fclose( fh ); - - // Open the shared object of what we want to execute - handle = dlopen( sharedObject, RTLD_LAZY ); - if ( !handle ) - fputs( dlerror(), stderr ), kill( callingPid, SIGUSR2 ), exit( 1 ); - - // Find main symbol and jump to it - childMain = dlsym( handle, "main" ); - if ( ( error = dlerror() ) != NULL ) - fputs( error, stderr ), kill( callingPid, SIGUSR2 ), exit( 1 ); - retVal = (*childMain)( argc, (char**)argv ); - - // Notify caller that we have finished - saveRetVal( retVal ); - kill( callingPid, SIGUSR2 ); - - // When we are done, close the shared object - dlclose( handle ); - return retVal; -} - - -void finishedHandler( int signal ) { - // We have been notified of the completion of the task - exit( loadRetVal() ); -} - - -void cleanUpHandler( int signal ) { - // Cleanup and exit if we have been told to quit - cleanUp(); - exit(1); -} - - -void signalHandler( int signal ) { - //printf("got a signal of %i\n", signal ); - - if ( fork() == 0 ) { - // We are the child process - -/* - while ( librariesFinishedLoading != 1 ) { - printf("waiting for libraries to load\n"); - sleep(1); - } -*/ - // Close file handles and open others etc - - // Execute the command and return when done - exit( execCmd() ); - } - - // Parent process, just continue - sleep( 1 ); // Need to yield to child process -} - - -void loadLibraries( char *listFile ) { - FILE *fh = fopen( listFile, "r" ); - char line[1024]; - if ( !fh ) - fputs("error opening library list file", stderr), exit(1); - while ( fgets( line, 1024, fh ) ) { - line[strlen( line ) - 1] = '\0'; - printf("loading library: --%s--\n", line); - handleCount++; - handles = realloc( handles, handleCount * sizeof( void * ) ); - handles[ handleCount - 1 ] = dlopen( line, RTLD_NOW ); - if ( !handles[ handleCount - 1 ] ) - fputs( dlerror(), stderr ), exit( 1 ); - } - fclose( fh ); - librariesFinishedLoading = 1; -} - diff --git a/quickexec/johns/so_stub.c b/quickexec/johns/so_stub.c deleted file mode 100644 index fe71f9c..0000000 --- a/quickexec/johns/so_stub.c +++ b/dev/null @@ -1,23 +0,0 @@ -#include <stdio.h> -#include <string.h> -#include <dlfcn.h> - - -int main( int argc, char *argv[] ) { - char module[1024]; - int (*loadedMain)( int argc, char *argv[] ); - char *error; - int retVal = 0; - void *handle; - strcpy( module, argv[0] ); - strcat( module, ".so" ); - if ( !(handle = dlopen( module, RTLD_LAZY ) ) ) - fputs( dlerror(), stderr ), exit( 1 ); - loadedMain = dlsym( handle, "main" ); - if ( ( error = dlerror() ) != NULL ) - fputs( error, stderr ), exit( 1 ); - retVal = (*loadedMain)( argc, argv ); - dlclose( handle ); - return retVal; -} - |