140 lines
3.9 KiB
C
140 lines
3.9 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <math.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/select.h>
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#include <fcntl.h>
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#include "../error.h"
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#define SLAVE_NUM 3
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#define MAX_SIZE 200
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void create(int ans[2], int pipes[SLAVE_NUM][2]);
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int main(int argc, char *argv[]) {
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//setvbuf(stdout, NULL, _IONBF, 0);
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if (argc == 1)
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printError("Error: no arguments provided");
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int ans[2];
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int pipes[SLAVE_NUM][2];
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create(ans, pipes);
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//sleep(1);
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fd_set ansSet;
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FD_ZERO(&ansSet);
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FD_SET(ans[0], &ansSet);
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fd_set fdSet;
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FD_ZERO(&fdSet);
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int n = 0;
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for (; n < SLAVE_NUM; n++)
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FD_SET(pipes[n][1], &fdSet);
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int flag = 0, j = 0;
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struct stat statBuf;
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int i = 1;
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for (; i < argc; i++) {
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if (stat(argv[i], &statBuf) == -1)
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printSystemError("Error, one of the specified paths is incorrect");
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if (!S_ISREG(statBuf.st_mode))
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continue;
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if (j == SLAVE_NUM) {
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j = 0;
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flag = 1;
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}
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if (!flag) {
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if (write(pipes[j++][1], argv[i], strlen(argv[i]) + 1) < 0) {
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//if (write(pipes[j++][1], "prueba.cnf\n", strlen(argv[i]) + 1) < 0) {
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printSystemError("write() -- ERROR");
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}
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//close(pipes[j-1][1]);
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} else {
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int fd;
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if ((fd = select(5, &fdSet, NULL, NULL, NULL) < 0))
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printSystemError("select() -- ERROR");
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char buf[MAX_SIZE];
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if (read(fd, buf, MAX_SIZE) < 0)
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printSystemError("read() -- ERROR");
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printf("%s", buf);
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int k = 0;
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for (; i < SLAVE_NUM; k++) {
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if (pipes[k][1] == fd) {
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if (write(pipes[k][1], argv[i], strlen(argv[i])) < 0)
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printSystemError("write() -- ERROR");
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continue;
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}
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}
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}
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}
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int fd;
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char buf[MAX_SIZE];
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if ((fd = select(ans[0] + 1, &ansSet, NULL, NULL, NULL)) < 0)
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printSystemError("select() -- ERROR");
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while (fd > 0) {
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int readBytes = 0;
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do {
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if ((readBytes += read(ans[0], buf + readBytes, MAX_SIZE)) < 0)
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printSystemError("read() -- ERROR");
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} while (buf[readBytes - 1] != '\n');
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buf[readBytes] = 0;
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printf("%s\n", buf);
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}
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/*
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readBytes = 0;
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do {
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if ((readBytes += read(ans[0], buf + readBytes, MAX_SIZE)) < 0)
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printSystemError("read() -- ERROR");
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} while (buf[readBytes - 1] != '\n');
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buf[readBytes] = 0;
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printf("%s\n", buf);
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*/
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}
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void create(int ans[2], int pipes[5][2]) {
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pid_t pid[SLAVE_NUM];
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if (pipe(ans) < 0)
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printSystemError("pipe() -- ERROR");
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int i = 0;
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for (; i < SLAVE_NUM; i++) {
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if (pipe(pipes[i]) < 0)
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printSystemError("pipe() -- ERROR");
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if ((pid[i] = fork()) == 0) {
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if (close(ans[0]) < 0)
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printSystemError("close() -- ERROR");
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if (dup2(ans[1], STDOUT_FILENO) < 0)
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printSystemError("dup2() -- ERROR 1");
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if (close(ans[1]) < 0)
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printSystemError("close() -- ERROR");
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if (close(pipes[i][1]) < 0)
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printSystemError("close() -- ERROR");
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if (dup2(pipes[i][0], STDIN_FILENO) < 0)
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printSystemError("dup2() -- ERROR 2");
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if (close(pipes[i][0]) < 0)
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printSystemError("close() -- ERROR");
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if (execv("slave.o", NULL) < 0)
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printSystemError("execv() -- ERROR");
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}
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else if (pid[i] < 0)
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printSystemError("fork() -- ERROR");
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if (close(pipes[i][0]) < 0)
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printSystemError("close() -- ERROR");
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}
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if (close(ans[1]) < 0)
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printSystemError("close() -- ERROR");
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}
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