void StartProg( char *cmd, char *prog, char *full_args, char *dos_args )
{
char exe_name[PATH_MAX];
pid_t save_pgrp;
pid_t pid;
int status;
MaxThread = 0;
GrowArrays( 1 );
HaveRdebug = false;
DbgDyn = NULL;
OrigPGrp = getpgrp();
Attached = true;
pid = Pid = SamplePid;
/* allow attaching to existing process by pid */
if( pid == 0 || ptrace( PTRACE_ATTACH, pid, NULL, NULL ) == -1 ) {
int num_args;
size_t len;
const char **argv;
Attached = false;
/* massage 'full_args' into argv format */
len = strlen( full_args );
num_args = SplitParms( full_args, NULL, len );
argv = alloca( ( num_args + 2 ) * sizeof( *argv ) );
argv[SplitParms( full_args, argv + 1, len ) + 1] = NULL;
argv[0] = prog;
Output( MsgArray[MSG_SAMPLE_1 - ERR_FIRST_MESSAGE] );
Output( prog );
Output( "\n" );
save_pgrp = getpgrp();
setpgid( 0, OrigPGrp );
pid = fork();
if( pid == -1 )
InternalError( MsgArray[MSG_SAMPLE_3 - ERR_FIRST_MESSAGE] );
if( pid == 0 ) {
int rc;
if( ptrace( PTRACE_TRACEME, 0, NULL, NULL ) < 0 ) {
InternalError( MsgArray[MSG_SAMPLE_4 - ERR_FIRST_MESSAGE] );
}
dbg_printf( "executing '%s'\n", prog );
for( rc = 0; argv[rc] != NULL; ++rc )
dbg_printf( "argv[%d] = '%s'\n", rc, argv[rc] );
rc = execve( prog, (char const * const *)argv, (char const * const *)environ );
dbg_printf( "execve() failed, returned %d\n", rc );
InternalError( MsgArray[MSG_SAMPLE_3 - ERR_FIRST_MESSAGE] ); // failsafe
}
setpgid( 0, save_pgrp );
strcpy( exe_name, prog );
} else if( pid ) {
GetExeNameFromPid( pid, exe_name, PATH_MAX );
Output( MsgArray[MSG_SAMPLE_1 - ERR_FIRST_MESSAGE] );
Output( exe_name );
Output( "\n" );
}
if( (pid != -1) && (pid != 0) ) {
/* wait until it hits _start (upon execve) or
gives us a SIGSTOP (if attached) */
if( waitpid( pid, &status, 0 ) < 0 )
goto fail;
if( !WIFSTOPPED( status ) )
goto fail;
if( Attached ) {
if( WSTOPSIG( status ) != SIGSTOP ) {
goto fail;
}
} else {
if( WSTOPSIG( status ) != SIGTRAP ) {
goto fail;
}
}
DbgDyn = GetDebuggeeDynSection( exe_name );
errno = 0;
}
if( errno != 0 ) {
pid = 0;
} else {
/* record information about main executable and initialize shared
* library tracking
*/
InitLibMap();
CodeLoad( exe_name, 0, SAMP_MAIN_LOAD );
SampleLoop( pid );
FiniLibMap();
}
return;
fail:
if( pid != 0 && pid != -1 ) {
if( Attached ) {
ptrace( PTRACE_DETACH, pid, NULL, NULL );
Attached = false;
} else {
ptrace( PTRACE_KILL, pid, NULL, NULL );
waitpid( pid, &status, 0 );
}
}
InternalError( MsgArray[MSG_SAMPLE_5 - ERR_FIRST_MESSAGE] );
}
unsigned ReqProg_load( void )
{
char **args;
char *parms;
char *parm_start;
int i;
char exe_name[PATH_MAX];
char *name;
pid_t save_pgrp;
prog_load_req *acc;
prog_load_ret *ret;
unsigned len;
int status;
acc = GetInPtr( 0 );
ret = GetOutPtr( 0 );
last_sig = -1;
have_rdebug = FALSE;
dbg_dyn = NULL;
at_end = FALSE;
parms = (char *)GetInPtr( sizeof( *acc ) );
parm_start = parms;
len = GetTotalSize() - sizeof( *acc );
if( acc->true_argv ) {
i = 1;
for( ;; ) {
if( len == 0 ) break;
if( *parms == '\0' ) {
i++;
}
++parms;
--len;
}
args = alloca( i * sizeof( *args ) );
parms = parm_start;
len = GetTotalSize() - sizeof( *acc );
i = 1;
for( ;; ) {
if( len == 0 ) break;
if( *parms == '\0' ) {
args[i++] = parms + 1;
}
++parms;
--len;
}
args[i - 1] = NULL;
} else {
while( *parms != '\0' ) {
++parms;
--len;
}
++parms;
--len;
i = SplitParms( parms, NULL, len );
args = alloca( (i + 2) * sizeof( *args ) );
args[SplitParms( parms, &args[1], len ) + 1] = NULL;
}
args[0] = parm_start;
attached = TRUE;
pid = RunningProc( args[0], &name );
if( pid == 0 || ptrace( PTRACE_ATTACH, pid, NULL, NULL ) == -1 ) {
attached = FALSE;
args[0] = name;
if( FindFilePath( TRUE, args[0], exe_name ) == 0 ) {
exe_name[0] = '\0';
}
save_pgrp = getpgrp();
setpgid( 0, OrigPGrp );
pid = fork();
if( pid == -1 )
return( 0 );
if( pid == 0 ) {
if( ptrace( PTRACE_TRACEME, 0, NULL, NULL ) < 0 ) {
exit( 1 );
}
execve( exe_name, (const char **)args, (const char **)dbg_environ );
exit( 1 ); /* failsafe */
}
setpgid( 0, save_pgrp );
} else if( pid ) {
GetExeNameFromPid( pid, exe_name, PATH_MAX );
}
ret->flags = 0;
ret->mod_handle = 0;
if( (pid != -1) && (pid != 0) ) {
int status;
ret->task_id = pid;
ret->flags |= LD_FLAG_IS_PROT | LD_FLAG_IS_32;
/* wait until it hits _start (upon execve) or
gives us a SIGSTOP (if attached) */
if( waitpid( pid, &status, 0 ) < 0 )
goto fail;
if( !WIFSTOPPED( status ) )
goto fail;
if( attached ) {
ret->flags |= LD_FLAG_IS_STARTED;
if( WSTOPSIG( status ) != SIGSTOP )
goto fail;
} else {
if( WSTOPSIG( status ) != SIGTRAP )
goto fail;
}
#if defined( MD_x86 )
if( !GetFlatSegs( &flatCS, &flatDS ) )
goto fail;
#endif
dbg_dyn = GetDebuggeeDynSection( exe_name );
AddProcess();
errno = 0;
}
ret->err = errno;
if( ret->err != 0 ) {
pid = 0;
}
CONV_LE_32( ret->err );
CONV_LE_32( ret->task_id );
CONV_LE_32( ret->mod_handle );
return( sizeof( *ret ) );
fail:
if( pid != 0 && pid != -1 ) {
if( attached ) {
ptrace( PTRACE_DETACH, pid, NULL, NULL );
attached = FALSE;
} else {
ptrace( PTRACE_KILL, pid, NULL, NULL );
waitpid( pid, &status, 0 );
}
}
pid = 0;
CONV_LE_32( ret->err );
CONV_LE_32( ret->task_id );
CONV_LE_32( ret->mod_handle );
return( 0 );
}
