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path: root/quickexec/johns/qinit_srv.c
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Diffstat (limited to 'quickexec/johns/qinit_srv.c') (more/less context) (ignore whitespace changes)
-rw-r--r--quickexec/johns/qinit_srv.c242
1 files changed, 0 insertions, 242 deletions
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;
-}
-