Finish job control

TODO.md

@@ -1,6 +1,5 @@
 # TODO
-- [ ] Add job control in main branch
+- [x] Add job control in main branch
-- [ ] Refactor all the unstable code
 - [ ] Add auto complete
 - [ ] Finish line editing
 - [ ] Syntax highlighting

src/args.c

@@ -80,6 +80,10 @@ bool process_args(ast_t *node, args_t *args, size_t *toks_i, ef_t *ef)
         tok.str[tok.sz] = '\0';
         return (process_globbing(tok.str, args, toks_i));
     }
+    if (tok.type == T_JOB) {
+        ef->bg = true;
+        return true;
+    }
     if (tok.type == T_TILDE)
         return handle_tilde(ef, &tok, args);
     handle_var_case(node, ef->exec_ctx, toks_i, args);

src/ast.h

@@ -40,9 +40,10 @@ typedef enum size_t {
     T_BACKSLASH = 1 << 19,
     T_NEWLINE = 1 << 20, // \n
     T_TILDE = 1 << 21, // ~
-    T_EOF = 1 << 22, // \0
+    T_JOB = 1 << 22, // &
-    T_ARG = 1 << 23,
+    T_EOF = 1 << 23, // \0
-    T_INVALID = 1 << 24
+    T_ARG = 1 << 24,
+    T_INVALID = 1 << 25
 } token_type_t;
 
 typedef enum {

src/ast/ast.c

@@ -39,7 +39,7 @@ ast_t *parse_arg(ast_ctx_t *ctx, ast_t *node)
         ctx->act_tok.type = T_ARG;
     }
     if (ctx->act_tok.type & (T_ARG | T_REDIRECT | T_APPEND |
-        T_IN_REDIRECT | T_HEREDOC | T_VAR | T_STAR | T_TILDE)) {
+        T_IN_REDIRECT | T_HEREDOC | T_VAR | T_STAR | T_TILDE | T_JOB)) {
         if (!ensure_node_cap(node))
             return nullptr;
         node->vector.tokens[node->vector.sz] = ctx->act_tok;

src/ast/tokeniser.c

@@ -17,6 +17,7 @@ const tokens_list_t TOKENS_LIST[] = {
     { T_QUOTES, "\'", 1, "T_QUOTES"},
     { T_DQUOTES, "\"", 1, "T_DQUOTES"},
     { T_AND, "&&", 2, "T_AND" },
+    { T_JOB, "&", 1, "T_JOB" },
     { T_OR, "||", 2, "T_OR" },
     { T_PIPE, "|", 1, "T_PIPE" },
     { T_BACKTICK, "`", 1, "T_BACKTICK" },

src/builtins.h

@@ -57,4 +57,5 @@ int builtins_astprint(ef_t *, char **args);
 int builtins_termname(ef_t *ef, char **);
 int builtins_fg(ef_t *ef, char **);
 int builtins_bg(ef_t *ef, char **);
+int builtins_jobs(ef_t *ef, char **args);
 #endif /* BUILTIND_H */

src/builtins/bg.c

@@ -8,20 +8,30 @@
 
 #include <signal.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <sys/wait.h>
 #include <unistd.h>
 
 #include "common.h"
 #include "exec.h"
 
-int builtins_bg(ef_t *ef, char **)
+int builtins_bg(ef_t *ef, char **args)
 {
-    int last_job_index = ef->exec_ctx->jobs.sz - 1;
+    size_t job_idx = ef->exec_ctx->jobs.sz - 1;
+    char *end_ptr;
 
     if (!ef->exec_ctx->isatty) {
         fprintf(stderr, "No job control in this shell.\n");
         return RETURN_FAILURE;
     }
-    kill(-ef->exec_ctx->jobs.jobs[last_job_index].pgid, SIGCONT);
+    if (args[1] != nullptr) {
+        job_idx = strtol(args[1], &end_ptr, 10);
+        if (*end_ptr != '\0' || !job_idx
+            || job_idx > ef->exec_ctx->jobs.sz - 1)
+            return fprintf(stderr, "%s: No such job.\n", args[0]),
+                RETURN_FAILURE;
+    }
+    ef->exec_ctx->jobs.jobs[job_idx].running = true;
+    kill(-ef->exec_ctx->jobs.jobs[job_idx].pgid, SIGCONT);
     return RETURN_SUCCESS;
 }

src/builtins/fg.c

@@ -4,27 +4,45 @@
 ** File description:
 ** _
 */
-
+#include <signal.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <sys/wait.h>
 #include <unistd.h>
 
 #include "common.h"
 #include "exec.h"
 #include "job.h"
 
-int builtins_fg(ef_t *ef, char **)
+static
+bool get_job_idx(ef_t *ef, char **args, size_t *job_idx)
 {
-    int status = 0;
+    char *end_ptr;
-    int last_job_index = ef->exec_ctx->jobs.sz - 1;
+
+    if (args[1] != nullptr) {
+        *job_idx = strtol(args[1], &end_ptr, 10);
+        if (*end_ptr != '\0' || !*job_idx
+            || *job_idx > ef->exec_ctx->jobs.sz - 1)
+            return fprintf(stderr, "%s: No such job.\n", args[0]), false;
+    }
+    return true;
+}
+
+int builtins_fg(ef_t *ef, char **args)
+{
+    size_t job_idx = ef->exec_ctx->jobs.sz - 1;
+    int status;
 
     if (!ef->exec_ctx->isatty) {
         fprintf(stderr, "No job control in this shell.\n");
         return RETURN_FAILURE;
     }
-    if (!set_child_term(ef->exec_ctx, last_job_index))
+    if (!get_job_idx(ef, args, &job_idx))
         return RETURN_FAILURE;
-    kill(-ef->exec_ctx->jobs.jobs[last_job_index].pgid, SIGCONT);
+    if (!set_child_term(ef->exec_ctx, job_idx))
-    waitpid(-ef->exec_ctx->jobs.jobs[last_job_index].pgid, &status, WUNTRACED);
+        return RETURN_FAILURE;
+    kill(-ef->exec_ctx->jobs.jobs[job_idx].pgid, SIGCONT);
+    waitpid(-ef->exec_ctx->jobs.jobs[job_idx].pgid, &status, WUNTRACED);
     if (WIFEXITED(status)) {
         ef->exec_ctx->history->last_exit_code =
             ef->exec_ctx->history->last_exit_code ?:

src/builtins/jobs.c

@@ -0,0 +1,23 @@
+/*
+** EPITECH PROJECT, 2025
+** __
+** File description:
+** _
+*/
+
+#include <stdio.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "exec.h"
+
+int builtins_jobs(ef_t *ef, char **)
+{
+    if (!ef->exec_ctx->isatty)
+        return RETURN_SUCCESS;
+    for (size_t i = 1; i < ef->exec_ctx->jobs.sz; i++)
+        dprintf(ef->out_fd, "[%lu]  + %s\t %s.\n", i,
+            ef->exec_ctx->jobs.jobs[i].running ? "Running" : "Suspended",
+            ef->exec_ctx->jobs.jobs[i].bin_name);
+    return RETURN_SUCCESS;
+}

src/builtins_handler.h

@@ -20,6 +20,7 @@ typedef struct {
     pid_t pgid;
     bool running;
     bool foreground;
+    char *bin_name;
 } job_t;
 
 typedef struct {

src/exec.c

@@ -55,7 +55,8 @@ const builtins_funcs_t BUILTINS[] = {
     { "termname", &builtins_termname },
     { "echo", &builtins_echo },
     { "fg", &builtins_fg },
-    { "bg", &builtins_bg }
+    { "bg", &builtins_bg },
+    { "jobs", &builtins_jobs }
 };
 
 const size_t BUILTINS_SZ = sizeof BUILTINS / sizeof *BUILTINS;
@@ -136,35 +137,40 @@ void set_fd(ef_t *ef)
 }
 
 static
-int exec(char *full_bin_path, char **args, ef_t *ef)
+int wait_child(ef_t *ef, int status, pid_t pid)
 {
-    execve(full_bin_path, args, ef->env->env);
+    bool untraced = (!(ef->flags & F_PIPE) || ef->p_i == ef->p_sz - 1);
-    return command_error(full_bin_path, args, errno);
+
+    if (!init_child_job(ef->exec_ctx, pid, ef))
+        return RETURN_FAILURE;
+    if (ef->bg) {
+        printf("[%lu] %d\n", ef->exec_ctx->jobs.sz, pid);
+        return RETURN_SUCCESS;
+    }
+    waitpid(pid, &status, untraced ? WUNTRACED : WNOHANG);
+    if (WIFSTOPPED(status)) {
+        ef->exec_ctx->jobs.jobs[ef->exec_ctx->jobs.sz - 1].running = false;
+        ef->exec_ctx->jobs.jobs[ef->exec_ctx->jobs.sz - 1].foreground = false;
+        printf("\nSuspended\n");
+    }
+    return status;
 }
 
 static
 int launch_bin(char *full_bin_path, char **args, ef_t *ef)
 {
-    int status;
+    int status = 0;
     pid_t pid = fork();
-    bool untraced = (!(ef->flags & F_PIPE) || ef->p_i == ef->p_sz - 1);
 
     if (pid == 0) {
         set_fd(ef);
         restore_term_flags(ef->exec_ctx);
-        init_child_job(ef->exec_ctx, pid);
+        init_child_job(ef->exec_ctx, pid, ef);
-        status = exec(full_bin_path, args, ef);
+        execve(full_bin_path, args, ef->env->env);
+        status = command_error(full_bin_path, args, errno);
         exit(RETURN_FAILURE);
     }
-    if (!init_child_job(ef->exec_ctx, pid))
+    return wait_child(ef, status, pid);
-        return RETURN_FAILURE;
-    waitpid(pid, &status, untraced ? WUNTRACED : WNOHANG);
-    if (WIFSTOPPED(status)) {
-        ef->exec_ctx->jobs.jobs[ef->exec_ctx->jobs.sz - 1].running = true;
-        ef->exec_ctx->jobs.jobs[ef->exec_ctx->jobs.sz - 1].foreground = false;
-        printf("\nSuspended\n");
-    }
-    return status;
 }
 
 static

src/exec.h

@@ -44,6 +44,7 @@ typedef struct {
     int in_fd;
     int out_fd;
     exec_ctx_t *exec_ctx;
+    bool bg;
 } ef_t;
 
 __attribute__((nonnull))

src/job.c

@@ -9,6 +9,7 @@
 #include <unistd.h>
 
 #include "builtins_handler.h"
+#include "exec.h"
 #include "job.h"
 
 void set_ignored_signals(int child)
@@ -36,32 +37,39 @@ bool ensure_jobs_capacity(jobs_t *jobs)
 
 bool set_child_term(exec_ctx_t *ec, size_t idx)
 {
-    if (tcsetpgrp(ec->read_fd, ec->jobs.jobs[idx].pgid) < 0)
+    return tcsetpgrp(ec->read_fd, ec->jobs.jobs[idx].pgid) < 0 ? false : true;
+}
+
+static
+bool init_child_parent(exec_ctx_t *ec, pid_t pid, ef_t *ef)
+{
+    if (!ef->bg) {
+        setpgid(pid, pid);
+        tcsetpgrp(ec->read_fd, pid);
+    }
+    if (!ensure_jobs_capacity(&ec->jobs))
         return false;
+    ec->jobs.jobs[ec->jobs.sz].pgid = pid;
+    ec->jobs.jobs[ec->jobs.sz].running = true;
+    ec->jobs.jobs[ec->jobs.sz].foreground = !ef->bg;
+    ec->jobs.jobs[ec->jobs.sz].bin_name =
+        ec->history_command[ec->history_command->sz - 1].command;
+    ec->jobs.sz++;
     return true;
 }
 
-bool init_child_job(exec_ctx_t *ec, pid_t pid)
+bool init_child_job(exec_ctx_t *ec, pid_t pid, ef_t *ef)
 {
     if (!ec->isatty)
         return true;
     if (pid == 0) {
         setpgid(0, 0);
-        if (tcsetpgrp(ec->read_fd, getpid()) < 0)
+        if (!ef->bg && tcsetpgrp(ec->read_fd, getpid()) < 0)
             return false;
         set_ignored_signals(1);
-    } else {
+        return true;
-        setpgid(pid, pid);
-        if (tcsetpgrp(ec->read_fd, pid) < 0)
-            return false;
-        if (!ensure_jobs_capacity(&ec->jobs))
-            return false;
-        ec->jobs.jobs[ec->jobs.sz].pgid = pid;
-        ec->jobs.jobs[ec->jobs.sz].running = true;
-        ec->jobs.jobs[ec->jobs.sz].foreground = true;
-        ec->jobs.sz++;
     }
-    return true;
+    return init_child_parent(ec, pid, ef);
 }
 
 bool init_jobs(exec_ctx_t *ec)

src/job.h

@@ -10,11 +10,12 @@
     #include <sys/wait.h>
 
     #include "builtins_handler.h"
+    #include "exec.h"
     #define DEFAULT_JOBS_CAP 4
 
 bool ensure_jobs_capacity(jobs_t *jobs);
 bool init_jobs(exec_ctx_t *ec);
-bool init_child_job(exec_ctx_t *ec, pid_t pid);
+bool init_child_job(exec_ctx_t *ec, pid_t pid, ef_t *ef);
 bool set_child_term(exec_ctx_t *ec, size_t idx);
 void set_ignored_signals(int child);
 #endif /* JOB_H */

validation_tests.py

@@ -241,10 +241,8 @@ TESTS = [
         cmds=[
             "expr 1 + 2",
             "expr 4 - 2",
-            #"expr 3 \\* 5",
+            "expr 5 = 5",
-            #"expr 5 = 5",
+            "expr 1 != 5",
-            #"expr 5 \\< 10",
-            #"expr 5 \\> 3",
         ],
         depends_on=("ARGS",)
     ),
@@ -307,7 +305,6 @@ TESTS = [
             "where cd\n",
             "where echo\n",
             "alias ll ls\nwhere ll\n",
-            #"alias ll ls\nwhich ll\n",
         ],
         depends_on=("ALIAS",)
     ),
@@ -342,4 +339,15 @@ TESTS = [
             ],
         depends_on=()
     ),
+
+    Test(
+        key="JOBS_ERROR",
+        name="jobs error",
+        cmds=[
+            "fg\n",
+            "bg\n",
+            "jobs\n",
+            ],
+        depends_on=()
+    ),
 ]