#include "perl.h"
#include "XSUB.h"
-#if DJGPP==2 && DJGPP_MINOR<2
-
-/* XXX I should rewrite this stuff someday. ML */
-
-/* This is from popen.c */
-
-/* Copyright (C) 1997 DJ Delorie, see COPYING.DJ for details */
-/* Copyright (C) 1996 DJ Delorie, see COPYING.DJ for details */
-/* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
-
-/* hold file pointer, descriptor, command, mode, temporary file name,
- and the status of the command */
+/* hold file pointer, command, mode, and the status of the command */
struct pipe_list {
FILE *fp;
- int fd;
int exit_status;
- char *command, mode[10], temp_name[L_tmpnam];
struct pipe_list *next;
+ char *command, mode;
};
/* static, global list pointer */
popen (const char *cm, const char *md) /* program name, pipe mode */
{
struct pipe_list *l1;
+ int fd;
+ char *temp_name=NULL;
/* make new node */
- if ((l1 = (struct pipe_list *) malloc (sizeof (struct pipe_list))) == NULL)
- return NULL;
-
- /* zero out elements to we'll get here */
- l1->fp = NULL;
- l1->next = pl;
- pl = l1;
-
- /* stick in elements we know already */
- l1->exit_status = -1;
- strcpy (l1->mode, md);
- if (tmpnam (l1->temp_name) == NULL)
- return NULL;
-
- /* if can save the program name, build temp file */
- if ((l1->command = malloc(strlen(cm)+1)))
+ if ((l1 = (struct pipe_list *) malloc (sizeof (*l1)))
+ && (temp_name = malloc (L_tmpnam)) && tmpnam (temp_name))
{
- strcpy(l1->command, cm);
+ l1->fp = NULL;
+ l1->command = NULL;
+ l1->next = pl;
+ l1->exit_status = -1;
+ l1->mode = md[0];
+
/* if caller wants to read */
- if (l1->mode[0] == 'r')
+ if (md[0] == 'r' && (fd = dup (fileno (stdout))) >= 0)
{
- /* dup stdout */
- if ((l1->fd = dup (fileno (stdout))) == EOF)
- l1->fp = NULL;
- else if (!(l1->fp = freopen (l1->temp_name, "wb", stdout)))
- l1->fp = NULL;
- else
- /* exec cmd */
+ if ((l1->fp = freopen (temp_name, "wb", stdout)))
{
- if ((l1->exit_status = system (cm)) == EOF)
- l1->fp = NULL;
+ l1->exit_status = system (cm);
+ if (dup2 (fd, fileno (stdout)) >= 0)
+ l1->fp = fopen (temp_name, md);
}
- /* reopen real stdout */
- if (dup2 (l1->fd, fileno (stdout)) == EOF)
- l1->fp = NULL;
- else
- /* open file for reader */
- l1->fp = fopen (l1->temp_name, l1->mode);
- close(l1->fd);
+ close (fd);
}
- else
- /* if caller wants to write */
- if (l1->mode[0] == 'w')
- /* open temp file */
- l1->fp = fopen (l1->temp_name, l1->mode);
- else
- /* unknown mode */
- l1->fp = NULL;
+ /* if caller wants to write */
+ else if (md[0] == 'w' && (l1->command = malloc (1 + strlen (cm))))
+ {
+ strcpy (l1->command, cm);
+ l1->fp = fopen (temp_name, md);
+ }
+
+ if (l1->fp)
+ {
+ l1->fp->_flag |= _IORMONCL; /* remove on close */
+ l1->fp->_name_to_remove = temp_name;
+ return (pl = l1)->fp;
+ }
+ free (l1->command);
}
- return l1->fp; /* return == NULL ? ERROR : OK */
+ free (temp_name);
+ free (l1);
+ return NULL;
}
int
pclose (FILE *pp)
{
- struct pipe_list *l1, *l2; /* list pointers */
- int retval=0; /* function return value */
-
- /* if pointer is first node */
- if (pl->fp == pp)
- {
- /* save node and take it out the list */
- l1 = pl;
- pl = l1->next;
- }
- else
- /* if more than one node in list */
- if (pl->next)
- {
- /* find right node */
- for (l2 = pl, l1 = pl->next; l1; l2 = l1, l1 = l2->next)
- if (l1->fp == pp)
- break;
+ struct pipe_list *l1, **l2; /* list pointers */
+ int retval=-1; /* function return value */
- /* take node out of list */
- l2->next = l1->next;
- }
- else
- return -1;
+ for (l2 = &pl; *l2 && (*l2)->fp != pp; l2 = &((*l2)->next))
+ ;
+ if (!(l1 = *l2))
+ return retval;
+ *l2 = l1->next;
- /* if FILE not in list - return error */
- if (l1->fp == pp)
+ /* if pipe was opened to write */
+ if (l1->mode == 'w')
{
- /* close the (hopefully) popen()ed file */
- fclose (l1->fp);
+ int fd;
+ fflush (l1->fp);
+ close (fileno (l1->fp));
- /* if pipe was opened to write */
- if (l1->mode[0] == 'w')
+ if ((fd = dup (fileno (stdin))) >= 0
+ && (freopen (l1->fp->_name_to_remove, "rb", stdin)))
{
- /* dup stdin */
- if ((l1->fd = dup (fileno (stdin))) == EOF)
- retval = -1;
- else
- /* open temp stdin */
- if (!(l1->fp = freopen (l1->temp_name, "rb", stdin)))
- retval = -1;
- else
- /* exec cmd */
- if ((retval = system (l1->command)) != EOF)
- {
- /* reopen stdin */
- if (dup2 (l1->fd, fileno (stdin)) == EOF)
- retval = -1;
- }
- close(l1->fd);
+ retval = system (l1->command);
+ dup2 (fd, fileno (stdin));
}
- else
- /* if pipe was opened to read, return the exit status we saved */
- if (l1->mode[0] == 'r')
- retval = l1->exit_status;
- else
- /* invalid mode */
- retval = -1;
+ close (fd);
+ free (l1->command);
}
- remove (l1->temp_name); /* remove temporary file */
- free (l1->command); /* dealloc memory */
- free (l1); /* dealloc memory */
+ else
+ /* if pipe was opened to read, return the exit status we saved */
+ retval = l1->exit_status;
- return retval; /* retval==0 ? OK : ERROR */
+ fclose (l1->fp); /* this removes the temp file */
+ free (l1);
+ return retval; /* retval==0 ? OK : ERROR */
}
-#endif
-
/**/
#define EXECF_SPAWN 0
projects / p5sagit/p5-mst-13.2.git / blobdiff