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/*
* child.c
*
* Created by Matt Welsh, 1995
*
* Adapted by Adam Carpenter - acarpent - acarpenter@email.wm.edu
* April 2017
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/time.h>
#include <string.h>
#include "child.h"
/* Exec the named cmd as a child process, returning
* two pipes to communicate with the process, and
* the child's process ID */
int start_child(char *cmd, FILE **readpipe, FILE **writepipe) {
int childpid, pipe1[2], pipe2[2];
if ((pipe(pipe1) < 0) || (pipe(pipe2) < 0) ) {
perror("pipe"); exit(-1);
}
if ((childpid = fork()) < 0) {
perror("fork"); exit(-1);
} else if (childpid > 0) { /* Parent. */
close(pipe1[0]); close(pipe2[1]);
/* Write to child on pipe1[1], read from child on pipe2[0]. */
*readpipe = fdopen(pipe2[0], "r");
*writepipe = fdopen(pipe1[1], "w");
setlinebuf(*writepipe);
return childpid;
} else { /* Child. */
close(pipe1[1]); close(pipe2[0]);
/* Read from parent on pipe1[0], write to parent on pipe2[1]. */
dup2(pipe1[0],0); dup2(pipe2[1],1);
close(pipe1[0]); close(pipe2[1]);
if (execlp(cmd, cmd, NULL) < 0)
perror("execlp");
/* Never returns */
}
return 0; // to keep the compiler happy
}
void i_am_the_master_commander(char *handle, char *opphandle, FILE **writeTo) {
/*
* Look, don't touch.
*/
if (strcmp(handle, "Adam") == 0) {
fprintf(*writeTo, ".statusFrame.playerStatus configure -fg blue\n");
}
else if (strcmp(handle, "Dan") == 0) {
fprintf(*writeTo, ".statusFrame.playerStatus configure -fg red\n");
}
else if (strcmp(handle, "Amy") == 0) {
fprintf(*writeTo, ".statusFrame.playerStatus configure -fg \"light sea green\"\n");
}
if (strcmp(opphandle, "Adam") == 0) {
fprintf(*writeTo, ".statusFrame.opponentStatus configure -fg blue\n");
}
else if (strcmp(opphandle, "Dan") == 0) {
fprintf(*writeTo, ".statusFrame.opponentStatus configure -fg red\n");
}
else if (strcmp(opphandle, "Amy") == 0) {
fprintf(*writeTo, ".statusFrame.opponentStatus configure -fg \"light sea green\"\n");
}
}
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