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popen.c
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C/C++ Source or Header
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1995-01-12
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4KB
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156 lines
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <exec/types.h>
#include <dos/dos.h>
#include <dos/dostags.h>
#ifdef __SASC
#include <proto/dos.h>
#endif
#ifdef __GNUC__
#include <inline/dos.h>
#endif
#ifndef AMIGA
static char template[] = "piXXXXXX";
#else
extern char *mktemp(char *);
#endif
typedef enum { unopened = 0, reading, writing } pipemode;
static
struct {
char *command;
char *name;
pipemode pmode;
} pipes[FOPEN_MAX];
static struct TagItem Tags[] = {
{NP_StackSize, 250000},
{TAG_DONE, NULL}
};
FILE *
popen(const char *command, const char *mode ) {
FILE *current;
char *name;
int cur;
pipemode curmode;
#ifdef AMIGA
char template[] = "T:piXXXXXX";
#endif
/*
** decide on mode.
*/
if(strcmp(mode,"r") == 0)
curmode = reading;
else if(strcmp(mode,"w") == 0)
curmode = writing;
else
return NULL;
/*
** get a name to use.
*/
#ifdef AMIGA
name = mktemp(template);
#else
if((name = tempnam(".","pip"))==NULL)
return NULL;
#endif
/*
** 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);
SystemTagList(cmd, Tags);
if((current = fopen(name,"r")) == NULL)
return NULL;
} else {
if((current = fopen(name,"w")) == NULL)
return NULL;
}
cur = fileno(current);
pipes[cur].name = strdup(name);
pipes[cur].pmode = curmode;
pipes[cur].command = strdup(command);
return current;
}
int
pclose( FILE * current) {
int cur = fileno(current),rval;
/*
** 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.
*/
char command[256];
fclose(current);
sprintf(command,"%s < %s",pipes[cur].command,pipes[cur].name);
rval = SystemTagList(command, Tags);
unlink(pipes[cur].name);
}
/*
** clean up current pipe.
*/
pipes[cur].pmode = unopened;
free(pipes[cur].name);
free(pipes[cur].command);
return rval;
}
/* Special version of popen, to call the SAS/C preprocessor */
FILE *
popen2(const char *command) {
FILE *current;
char *name;
int cur;
char template[] = "T:piXXXXXX";
char cmd[256], tmpname[256];
char *fname, *fpart;
BPTR l;
/*
** get a name to use.
*/
name = mktemp(template);
/*
** We're reading, just call system to get a file filled with
** output.
*/
fname = strrchr(command, ' ');
*fname++ = 0;
l = Lock(fname, ACCESS_READ);
if (!l) return NULL;
strcpy(tmpname, fname);
fpart = FilePart(tmpname);
*fpart = 0;
strcat(tmpname, "__ray__.c");
MakeLink(tmpname, l, 0);
UnLock(l);
sprintf(cmd,"%s OBJNAME %s %s",command,name,tmpname);
cmd[strlen(cmd)-2] = '\0';
SystemTagList(cmd, Tags);
DeleteFile(tmpname);
*--fname = ' ';
if((current = fopen(name,"r")) == NULL)
return NULL;
cur = fileno(current);
pipes[cur].name = strdup(name);
pipes[cur].pmode = reading;
pipes[cur].command = strdup(command);
return current;
}