diff options
Diffstat (limited to 'os2/popen.c')
| -rw-r--r-- | os2/popen.c | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/os2/popen.c b/os2/popen.c deleted file mode 100644 index b9522b5671..0000000000 --- a/os2/popen.c +++ /dev/null @@ -1,241 +0,0 @@ -/* added real/protect mode branch at runtime and real mode version - * names changed for perl - * Kai Uwe Rommel - */ - -/* -Several people in the past have asked about having Unix-like pipe -calls in OS/2. The following source file, adapted from 4.3 BSD Unix, -uses a #define to give you a pipe(2) call, and contains function -definitions for popen(3) and pclose(3). Anyone with problems should -send mail to me; they seem to work fine. - -Mark Towfigh -Racal Interlan, Inc. -----------------------------------cut-here------------------------------------ -*/ - -/* - * The following code segment is derived from BSD 4.3 Unix. See - * copyright below. Any bugs, questions, improvements, or problems - * should be sent to Mark Towfigh (towfiq@interlan.interlan.com). - * - * Racal InterLan Inc. - */ - -/* - * Copyright (c) 1980 Regents of the University of California. - * All rights reserved. The Berkeley software License Agreement - * specifies the terms and conditions for redistribution. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <io.h> -#include <string.h> -#include <process.h> -#include <errno.h> - -#define INCL_NOPM -#define INCL_DOS -#include <os2.h> - -static FILE *dos_popen(const char *cmd, const char *flags); -static int dos_pclose(FILE *pipe); - -/* - * emulate Unix pipe(2) call - */ - -#define tst(a,b) (*mode == 'r'? (b) : (a)) -#define READH 0 -#define WRITEH 1 - -static int popen_pid[20]; - -FILE *mypopen(char *cmd, char *mode) -{ - int p[2]; - register myside, hisside, save_stream; - char *shell = getenv("COMPSPEC"); - - if ( shell == NULL ) - shell = "C:\\OS2\\CMD.EXE"; - - if ( _osmode == DOS_MODE ) - return dos_popen(cmd, mode); - - if ( _pipe(p, 4096, 0) ) - return NULL; - - myside = tst(p[WRITEH], p[READH]); - hisside = tst(p[READH], p[WRITEH]); - - /* set up file descriptors for remote function */ - save_stream = dup(tst(0, 1)); /* don't lose stdin/out! */ - if (dup2(hisside, tst(0, 1)) < 0) - { - perror("dup2"); - return NULL; - } - close(hisside); - - /* - * make sure that we can close our side of the pipe, by - * preventing it from being inherited! - */ - - /* set no-inheritance flag */ - DosSetFHandState(myside, OPEN_FLAGS_NOINHERIT); - - /* execute the command: it will inherit our other file descriptors */ - popen_pid[myside] = spawnlp(P_NOWAIT, shell, shell, "/C", cmd, NULL); - - /* now restore our previous file descriptors */ - if (dup2(save_stream, tst(0, 1)) < 0) /* retrieve stdin/out */ - { - perror("dup2"); - return NULL; - } - close(save_stream); - - return fdopen(myside, mode); /* return a FILE pointer */ -} - -int mypclose(FILE *ptr) -{ - register f; - int status; - - if ( _osmode == DOS_MODE ) - return dos_pclose(ptr); - - f = fileno(ptr); - fclose(ptr); - - /* wait for process to terminate */ - cwait(&status, popen_pid[f], WAIT_GRANDCHILD); - - return status; -} - - -int pipe(int *filedes) -{ - int res; - - if ( res = _pipe(filedes, 4096, 0) ) - return res; - - DosSetFHandState(filedes[0], OPEN_FLAGS_NOINHERIT); - DosSetFHandState(filedes[1], OPEN_FLAGS_NOINHERIT); - return 0; -} - - -/* this is the MS-DOS version */ - -typedef enum { unopened = 0, reading, writing } pipemode; - -static struct -{ - char *name; - char *command; - pipemode pmode; -} -pipes[_NFILE]; - -static FILE *dos_popen(const char *command, const char *mode) -{ - FILE *current; - char name[128]; - char *tmp = getenv("TMP"); - int cur; - pipemode curmode; - - /* - ** decide on mode. - */ - if(strchr(mode, 'r') != NULL) - curmode = reading; - else if(strchr(mode, 'w') != NULL) - curmode = writing; - else - return NULL; - - /* - ** get a name to use. - */ - strcpy(name, tmp ? tmp : "\\"); - if ( name[strlen(name) - 1] != '\\' ) - strcat(name, "\\"); - strcat(name, "piXXXXXX"); - mktemp(name); - - /* - ** If we're reading, just call system to get a file filled with - ** output. - */ - if(curmode == reading) - { - char cmd[256]; - sprintf(cmd,"%s > %s", command, name); - system(cmd); - - if((current = fopen(name, mode)) == NULL) - return NULL; - } - else - { - if((current = fopen(name, mode)) == NULL) - return NULL; - } - - cur = fileno(current); - pipes[cur].name = strdup(name); - pipes[cur].command = strdup(command); - pipes[cur].pmode = curmode; - - return current; -} - -static int dos_pclose(FILE * current) -{ - int cur = fileno(current), rval; - char command[256]; - - /* - ** check for an open file. - */ - if(pipes[cur].pmode == unopened) - return -1; - - if(pipes[cur].pmode == reading) - { - /* - ** input pipes are just files we're done with. - */ - rval = fclose(current); - unlink(pipes[cur].name); - } - else - { - /* - ** output pipes are temporary files we have - ** to cram down the throats of programs. - */ - fclose(current); - sprintf(command,"%s < %s", pipes[cur].command, pipes[cur].name); - rval = system(command); - unlink(pipes[cur].name); - } - - /* - ** clean up current pipe. - */ - free(pipes[cur].name); - free(pipes[cur].command); - pipes[cur].pmode = unopened; - - return rval; -} |