3 files changed, 105 insertions, 19 deletions
diff --git a/redes/exec.c b/redes/exec.c
new file mode 100644
index 0000000..18ea59e
--- /dev/null
+++ b/redes/exec.c
@@ -0,0 +1,80 @@
+#include <unistd.h>
+#include "syntax.h"
+
+
+void exec_cmd(ExecutableCommand cmd, int* pgid) {
+    
+    pid_t pid = fork();
+
+    if (pid == 0) {
+        
+        if (*pgid == -1) {
+            setpgid(0, 0);
+        } else {
+            setpgid(0, *pgid);
+        }
+
+        dup2(cmd.stdin_fd, STDIN_FILENO);
+        dup2(cmd.stdout_fd, STDOUT_FILENO);
+
+        for (int i = 0; i < cmd.open_fds.count; i++) {
+            FdRedirect fd_rd = *get_from_FdRedirectVec(&cmd.redirects, i);
+            dup2(fd_rd.to, fd_rd.redirected);
+        }
+
+        signal(SIGINT,  SIG_DFL);
+        signal(SIGQUIT, SIG_DFL);
+        signal(SIGTSTP, SIG_DFL);
+        signal(SIGTTIN, SIG_DFL);
+        signal(SIGTTOU, SIG_DFL);
+
+        execvp(cmd.args[0], cmd.args);
+        exit(67);
+    }
+
+    if (*pgid == -1) {
+        setpgid(pid, pid);
+        *pgid = pid;
+    } else {
+        setpgid(pid, *pgid);
+    }
+}
+
+
+ExecutableCommand process_pl_command(PlCommand pl_cmd) {
+    StrVec arg_vec = make_StrVec(256);
+    for (int i = 0; i < pl_cmd.args.count; i++) {
+        Arg arg = *get_from_ArgVec(&pl_cmd.args, i);
+        switch (arg.kind) {
+            case ARG_LIT:
+                push_to_StrVec(&arg_vec, arg.as.lit_str);
+                break;
+            default:
+                exit(67);
+        }
+    }
+
+    FdRedirectVec fd_redirs = make_FdRedirectVec(256);
+    for (int j = 0; j < pl_cmd.redirects.count, j++) {
+        Redirect redir = *get_from_RedirectVec(&pl_cmd.redirects, j);
+        FdRedirect fd_redir;
+        int fd;
+        switch (redir.kind) {
+            case REDIR_FILE_IN:  
+                fd = 
+        }
+    }
+}
+
+
+void execute_command_pipeline(PlCommand* pipeline) {
+    int trunk_fd = STDIN_FILENO;
+    int pgid = -1;
+
+    size_t i = 0;
+    Connector last_conn;
+    do {
+        PlCommand cmd = pipeline[i];
+        
+    } while (last_conn != CONN_EOL);
+}
diff --git a/redes/lexparse.c b/redes/lexparse.c
index 0ea86df..d23268c 100644
--- a/redes/lexparse.c
+++ b/redes/lexparse.c
@@ -1,6 +1,6 @@
 #include <ctype.h>
 #include "syntax.h"
-#include "utils.h"
+#include "../src/utils.h"
 
 typedef struct {
     Word word_germ;
diff --git a/redes/syntax.h b/redes/syntax.h
index 8404d15..1c43e49 100644
--- a/redes/syntax.h
+++ b/redes/syntax.h
@@ -1,6 +1,6 @@
 # pragma once
 
-#include "utils.h"
+#include "../src/utils.h"
 
 
 // Stage 1
@@ -106,8 +106,9 @@ typedef struct {
 
 
 typedef enum {
-    REDIR_FILE_IN,
-    REDIR_FILE_OUT,
+    REDIR_WRITE_TRUNC,
+    REDIR_WRITE_APPEND,
+    REDIR_READ,
     REDIR_FDS,
 } RedirectKind;
 
@@ -121,13 +122,23 @@ typedef struct {
 
 DECLARE_VEC(Redirect, RedirectVec)
 
+typedef struct PlCommand PlCommand;
+
+typedef enum {
+    ARG_PS_IN,
+    ARG_PS_OUT,
+    ARG_LIT,
+} ArgKind;
+
 typedef struct {
-    char** args;
-    RedirectVec redirects;
-} SimpleCommand;
+    ArgKind kind;
+    union {
+        char* lit_str;
+        PlCommand* sub_tree;
+    } as;
+} Arg;
 
-DECLARE_VEC(SimpleCommand, SimpleCommandVec)
-DECLARE_VEC(SimpleCommand*, SimpleCommandPtrVec)
+DECLARE_VEC(Arg, ArgVec)
 
 
 typedef enum {
@@ -135,18 +146,13 @@ typedef enum {
     CONN_EOL,
 } Connector;
 
-typedef struct {
-    SimpleCommand* cmd;
-    SimpleCommandPtrVec deps;
+struct PlCommand {
+    ArgVec args;
+    RedirectVec redirects;
     Connector conn;
-} PlCommand;
-
-DECLARE_VEC(PlCommand, PlCommandVec)
+};
 
-typedef struct {
-    SimpleCommandVec commands;
-    PlCommandVec pipeline;
-} ExecTree;
+DECLARE_VEC(PlCommand, Pipeline)