diff options
Diffstat (limited to 'teccmd.c')
| -rw-r--r-- | teccmd.c | 35 |
1 files changed, 21 insertions, 14 deletions
@@ -1719,19 +1719,15 @@ char pipebuff[IO_BUFFER_SIZE]; extern char susp_flag; struct undo_token *ut; int pid; -int bidir_flag; +int bidir_flag = arg_count > 0; int input_pipe[2], output_pipe[2]; int _errno; int status; PREAMBLE(); - /* TODO: if only arg1 is given, calculate the buffer range */ - /* FIXME: colon modifier does not return status */ - bidir_flag = (arg_count == 1 && arg1 != 0) || arg_count == 2; - /* - * For bidirectional piping mode, we need an additional input_pipe + * In bidirectional piping mode, the process will read stdin from input_pipe */ if(bidir_flag){ if (pipe(input_pipe)) { @@ -1742,8 +1738,8 @@ int status; }/* End IF */ /* - * otherwise the process will not get any input and write both stdout and stderr - * to output_pipe + * otherwise the process will not get any input and only write stdout to + * output_pipe */ if(pipe(output_pipe)){ sprintf(tmpbuf,"?Error creating PIPE: %s",error_text(errno)); @@ -1766,11 +1762,13 @@ int status; close(1); dup(output_pipe[1]); close(0); } - close(2); + close(2); /* don't use stderr */ close(output_pipe[0]); close(output_pipe[1]); - /* FIXME: close other file descriptors */ + /* Clean up */ + for (w = 3; w < 256; w++) + close(w); execl("/bin/sh","sh","-c",cp,NULL); exit(EXIT_FAILURE); @@ -1791,6 +1789,10 @@ int status; return(FAIL); }/* End IF */ +/* + * In bidirectional mode, write buffer range to input_pipe, delete buffer range + * and care about the Undo structures + */ if(bidir_flag){ status = buff_write(curbuf,input_pipe[1],arg1,arg2); close(input_pipe[1]); @@ -1818,6 +1820,9 @@ int status; * Loop reading stuff coming back from the pipe until we get an * EOF which means the process has finished. Update the screen * on newlines so the user can see what is going on. + * + * In unidirectional mode, process output is written to DOT, otherwise to + * the selected buffer range (it effectively gets replaced by the process output). */ ut = allocate_undo_token(uct); if(ut == NULL){ @@ -1873,7 +1878,8 @@ int status; /* * The wait here is required so that the process we forked doesn't - * stay around as a zombie. + * stay around as a zombie. Also the command will only be Successful + * if the process indicated Success. */ if(waitpid(pid,&status,0) == -1){ sprintf(tmpbuf,"?Error reaping child process <%d>: %s", @@ -1897,11 +1903,12 @@ int status; return(SUCCESS); -failreap: - /* - * NOTE: error message has already been displayed + * In case of errors, the process gets killed and is reaped. + * NOTE: Error message has already been displayed */ + +failreap: kill(pid,SIGKILL); waitpid(pid,NULL,0); return(FAIL); |