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#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "arg.h"
#include "types.h"
#include "util.h"
struct line runextension(struct line *data, char *filename, size_t n) {
struct line line;
int in[2];
int out[2];
if (pipe(out) == -1 || pipe(in) == -1)
die("pipe");
pid_t pid = fork();
if (pid == -1)
die("fork");
if (pid == 0) {
// child
dup2(out[1], STDOUT_FILENO);
close(out[0]);
close(out[1]);
dup2(in[1], STDIN_FILENO);
close(in[0]);
close(in[1]);
char *eargv[4];
eargv[0] = conf.extension;
eargv[1] = filename;
eargv[2] = malloc((intlen(n) + 1) * sizeof(char));
if (eargv[2] == NULL)
die("malloc");
sprintf(eargv[2], "%zu", n);
eargv[3] = NULL;
if (execvp(conf.extension, eargv) == -1)
die("exec");
} else {
// parent
close(out[1]);
close(in[1]);
write(in[0], "test\0", 4);
char *buf = malloc(256);
memset(buf, '\0', 256);
size_t len = read(out[0], buf, 256);
line.buf = buf;
line.len = len;
int status;
waitpid(pid, &status, 0);
if (WEXITSTATUS(status) != EXIT_SUCCESS) {
die("exec fail");
}
}
close(out[0]);
close(out[1]);
close(in[0]);
close(in[1]);
return line;
}
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