apps/CMakeLists.txt

@@ -7,10 +7,8 @@ function(luna_app SOURCE_FILE APP_NAME)
 endfunction()
 
 luna_app(init.cpp init)
-luna_app(env.cpp env)
-
 luna_app(sh.cpp sh)
-target_link_libraries(sh PRIVATE os)
+luna_app(env.cpp env)
 
 luna_app(cat.cpp cat)
 target_link_libraries(cat PRIVATE os)

apps/sh.cpp

@@ -1,5 +1,4 @@
 #include <luna/Vector.h>
-#include <os/ArgumentParser.h>
 
 #include <errno.h>
 #include <stddef.h>
@@ -31,56 +30,17 @@ static Result<Vector<char*>> split_command_into_argv(const char* cmd)
     return result;
 }
 
-[[noreturn]] static void execute_command(const char* command)
+int main()
 {
-    Vector<char*> argv;
-    bool ok = split_command_into_argv(command).try_move_value_or_error(argv, errno);
-    if (!ok)
-    {
-        perror("failed to parse command");
-        exit(1);
-    }
-
-    if (argv[0] == NULL) exit(0);
-    execvp(argv[0], argv.data());
-    perror(argv[0]);
-    exit(1);
-}
-
-int main(int argc, char** argv)
-{
-    StringView file;
-    StringView command;
-
-    FILE* f;
-
-    os::ArgumentParser parser;
-    parser.add_positional_argument(file, "file"_sv, "-"_sv);
-    parser.add_value_argument(command, 'c', "command"_sv, true);
-    parser.parse(argc, argv);
-
-    if (!command.is_empty()) { execute_command(command.chars()); }
-
-    if (file == "-") f = stdin;
-    else
-    {
-        f = fopen(file.chars(), "r");
-        if (!f)
-        {
-            perror("fopen");
-            return 1;
-        }
-    }
-
     while (1)
     {
-        if (file == "-") fputs("sh$ ", stdout);
+        fputs("sh$ ", stdout);
 
-        char cmd[4096];
-        char* rc = fgets(cmd, sizeof(cmd), f);
+        char command[4096];
+        char* rc = fgets(command, sizeof(command), stdin);
         if (!rc) return 0;
 
-        if (strspn(cmd, " \n") == strlen(cmd)) continue;
+        if (strspn(command, " \n") == strlen(command)) continue;
 
         pid_t child = fork();
         if (child < 0)
@@ -89,7 +49,21 @@ int main(int argc, char** argv)
             return 1;
         }
 
-        if (child == 0) { execute_command(cmd); }
+        if (child == 0)
+        {
+            Vector<char*> argv;
+            bool ok = split_command_into_argv(command).try_move_value_or_error(argv, errno);
+            if (!ok)
+            {
+                perror("failed to parse command");
+                return 1;
+            }
+
+            if (argv[0] == NULL) return 0;
+            execvp(argv[0], argv.data());
+            perror(argv[0]);
+            return 1;
+        }
 
         if (waitpid(child, NULL, 0) < 0)
         {

libc/include/stdlib.h

@@ -100,8 +100,7 @@ extern "C"
     /* Exit the program abnormally, without performing any registered cleanup actions. */
     __noreturn void _Exit(int status);
 
-    /* Execute a shell command. */
-    int system(const char* cmd);
+    int system(const char*);
 
     /* Get the value of an environment variable. */
     char* getenv(const char* key);

libc/include/sys/wait.h

@@ -6,9 +6,6 @@
 #include <bits/waitpid.h>
 #include <sys/types.h>
 
-#define WIFEXITED(ret) ((ret) | 0)
-#define WEXITSTATUS(ret) ((ret)&0xff)
-
 #ifdef __cplusplus
 extern "C"
 {

libc/src/stdlib.cpp

@@ -6,7 +6,6 @@
 #include <luna/Utf8.h>
 #include <stdlib.h>
 #include <sys/syscall.h>
-#include <sys/wait.h>
 #include <unistd.h>
 
 template <typename ArgT, typename ResultT> static inline ResultT __generic_div(ArgT a, ArgT b)
@@ -176,28 +175,4 @@ extern "C"
     {
         free_impl(ptr);
     }
-
-    int system(const char* cmd)
-    {
-        if (!cmd)
-        {
-            // FIXME: Check if there is a shell available in the system.
-            errno = ENOTSUP;
-            return -1;
-        }
-
-        pid_t child = fork();
-        if (child == 0)
-        {
-            execl("/bin/sh", "sh", "-c", cmd, NULL);
-            _Exit(127);
-        }
-
-        if (child < 0) return -1;
-
-        int status;
-        waitpid(child, &status, 0);
-
-        return status;
-    }
 }