refactor: restructure the user space stuff.

[lunaix-os.git] / lunaix-os / uprog / sh.c

diff --git a/lunaix-os/uprog/sh.c b/lunaix-os/uprog/sh.c
deleted file mode 100644 (file)
index 616fa67..0000000
--- a/lunaix-os/uprog/sh.c
+++ /dev/null
@@ -1,181 +0,0 @@
-#include <errno.h>
-#include <signal.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <sys/lunaix.h>
-#include <unistd.h>
-
-char pwd[512];
-char cat_buf[1024];
-
-/*
-    Simple shell - (actually this is not even a shell)
-    It just to make the testing more easy.
-*/
-
-#define WS_CHAR(c)                                                             \
-    (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\v' || c == '\r')
-
-void
-strrtrim(char* str)
-{
-    size_t l = strlen(str);
-    while (l < (size_t)-1) {
-        char c = str[l];
-        if (!c || WS_CHAR(c)) {
-            l--;
-            continue;
-        }
-        break;
-    }
-    str[l + 1] = '\0';
-}
-
-char*
-strltrim_safe(char* str)
-{
-    size_t l = 0;
-    char c = 0;
-    while ((c = str[l]) && WS_CHAR(c)) {
-        l++;
-    }
-
-    if (!l)
-        return str;
-    return strcpy(str, str + l);
-}
-
-void
-parse_cmdline(char* line, char** cmd, char** arg_part)
-{
-    strrtrim(line);
-    line = strltrim_safe(line);
-    int l = 0;
-    char c = 0;
-    while ((c = line[l])) {
-        if (c == ' ') {
-            line[l++] = 0;
-            break;
-        }
-        l++;
-    }
-    *cmd = line;
-    if (c) {
-        *arg_part = strltrim_safe(line + l);
-    } else {
-        *arg_part = NULL;
-    }
-}
-
-void
-sh_printerr()
-{
-    switch (errno) {
-        case 0:
-            break;
-        case ENOTDIR:
-            printf("Error: Not a directory\n");
-            break;
-        case ENOENT:
-            printf("Error: No such file or directory\n");
-            break;
-        case EINVAL:
-            printf("Error: Invalid parameter or operation\n");
-            break;
-        case ENOTSUP:
-            printf("Error: Not supported\n");
-            break;
-        case EROFS:
-            printf("Error: File system is read only\n");
-            break;
-        case ENOMEM:
-            printf("Error: Out of memory\n");
-            break;
-        case EISDIR:
-            printf("Error: This is a directory\n");
-            break;
-        default:
-            printf("Error: (%d)\n", errno);
-            break;
-    }
-}
-
-void
-sigint_handle(int signum)
-{
-    return;
-}
-
-void
-sh_exec(const char* name, const char** argv)
-{
-    if (!strcmp(name, "cd")) {
-        chdir(argv[0]);
-        sh_printerr();
-        return;
-    }
-
-    pid_t p;
-    if (!(p = fork())) {
-        if (execve(name, argv, NULL)) {
-            sh_printerr();
-        }
-        _exit(1);
-    }
-    setpgid(p, getpgid());
-    waitpid(p, NULL, 0);
-}
-
-void
-sh_loop()
-{
-    char buf[512];
-    char *cmd, *argpart;
-    signal(SIGINT, sigint_handle);
-
-    // set our shell as foreground process
-    // (unistd.h:tcsetpgrp is essentially a wrapper of this)
-    // stdout (by default, unless user did smth) is the tty we are currently at
-    ioctl(stdout, TIOCSPGRP, getpgid());
-
-    char* argv[] = { 0, 0 };
-
-    while (1) {
-        getcwd(pwd, 512);
-        printf("[\033[2m%s\033[39;49m]$ ", pwd);
-        int sz = read(stdin, buf, 511);
-
-        if (sz < 0) {
-            printf("fail to read user input (%d)\n", geterrno());
-            return;
-        }
-
-        buf[sz] = '\0';
-
-        // currently, this shell only support single argument
-        parse_cmdline(buf, &cmd, &argv[0]);
-
-        if (cmd[0] == 0) {
-            printf("\n");
-            goto cont;
-        }
-
-        // cmd=="exit"
-        if (*(unsigned int*)cmd == 0x74697865U) {
-            break;
-        }
-
-        sh_exec(cmd, (const char**)&argv);
-    cont:
-        printf("\n");
-    }
-}
-
-void
-main()
-{
-    printf("\n Simple shell. Use <PG_UP> or <PG_DOWN> to scroll.\n\n");
-    sh_loop();
-    _exit(0);
-}
\ No newline at end of file