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Here's my code: #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <wait.h> #include <readline/readline.h> #define NUMPIPES 2 int main(int argc, char *argv[]) { char *bBuffer, *sPtr, *aPtr = NULL, *pipeComms[NUMPIPES], *cmdArgs[10]; int fdPipe[2], pCount, aCount, i, status, lPids[NUMPIPES]; pid_t pid; pipe(fdPipe); while(1) { bBuffer = readline("Shell> "); if(!strcasecmp(bBuffer, "exit")) { return 0; } sPtr = bBuffer; pCount = -1; do { aPtr = strsep(&sPtr, "|"); pipeComms[++pCount] = aPtr; } while(aPtr); for(i = 0; i < pCount; i++) { aCount = -1; do { aPtr = strsep(&pipeComms[i], " "); cmdArgs[++aCount] = aPtr; } while(aPtr); cmdArgs[aCount] = 0; if(strlen(cmdArgs[0]) > 0) { pid = fork(); if(pid == 0) { if(i == 0) { close(fdPipe[0]); dup2(fdPipe[1], STDOUT_FILENO); close(fdPipe[1]); } else if(i == 1) { close(fdPipe[1]); dup2(fdPipe[0], STDIN_FILENO); close(fdPipe[0]); } execvp(cmdArgs[0], cmdArgs); exit(1); } else { lPids[i] = pid; /*waitpid(pid, &status, 0); if(WIFEXITED(status)) { printf("[%d] TERMINATED (Status: %d)\n", pid, WEXITSTATUS(status)); }*/ } } } for(i = 0; i < pCount; i++) { waitpid(lPids[i], &status, 0); if(WIFEXITED(status)) { prin

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