Category : C Source Code
Archive   : EMXTEST8.ZIP
Filename : PIPE.C

 
Output of file : PIPE.C contained in archive : EMXTEST8.ZIP
/* pipe.c */

#include
#include
#include
#include
#include
#include
#include

static void my_dup2 (int from, int to)
{
int rc;

(void)close (to);
rc = dup (from);
if (rc == -1)
{
perror ("dup");
exit (2);
}
if (rc != to)
{
(void)fputs ("dup failed\n", stderr);
exit (2);
}
(void)close (from);
if (fcntl (to, F_SETFD, 0) != 0)
{
perror ("fcntl");
exit (2);
}
}


static void private (int handle)
{
if (fcntl (handle, F_SETFD, 1) != 0)
{
perror ("fcntl");
exit (2);
}
}


int main (int argc, char *argv[])
{
int ph[2];
int org_stdin, org_stdout, next_stdin, next_stdout;
int i, j;
char *nargv[1024], *p;

if (argc < 2)
{
(void)fputs ("Usage: pipe ...\n", stderr);
return (1);
}
org_stdin = dup (STDIN_FILENO);
if (org_stdin < 0)
{
perror ("dup stdin");
return (2);
}
org_stdout = dup (STDOUT_FILENO);
if (org_stdout < 0)
{
perror ("dup stdout");
return (2);
}
private (STDIN_FILENO);
private (STDOUT_FILENO);
ph[0] = org_stdin;
for (i = 1; i < argc; ++i)
{
next_stdin = ph[0];
if (i < argc-1)
{
if (pipe (ph) != 0)
{
perror ("pipe");
return (2);
}
private (ph[0]);
private (ph[1]);
next_stdout = ph[1];
}
else
next_stdout = org_stdout;
my_dup2 (next_stdin, STDIN_FILENO);
my_dup2 (next_stdout, STDOUT_FILENO);
p = argv[i]; j = 0;
while ((nargv[j++] = strtok (p, " \t")) != NULL)
p = NULL;
if (spawnvp (P_NOWAIT, nargv[0], (const char * const *)nargv) == -1)
{
perror ("spawnlp");
return (2);
}
}
for (i = 1; i < argc; ++i)
(void)wait (NULL);
return (0);
}


  3 Responses to “Category : C Source Code
Archive   : EMXTEST8.ZIP
Filename : PIPE.C
”

  1. Daniel says:
    January 27, 2013 at 3:59 pm

    Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. Joshie says:
    March 18, 2014 at 4:57 pm

    This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. DiskingRound says:
    January 14, 2015 at 10:57 pm

    But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/