i86/mtx-16-bit/mtx/samples/SERIAL/USER/ucode.c

   1 // ucode.c file
   2
   3 char *cmd[]={"getpid", "ps", "chname", "kmode", "switch", "wait", "die",
   4              "fork", "exec", "color", 0};
   5
   6 int show_menu()
   7 {
   8    printf("************************* Menu *****************************\n");
   9    printf("* ps chname kmode switch wait die fork exec color sin sout *\n");
  10    /*         1   2      3     4     5    6   7    8    9    10   11   */
  11    printf("************************************************************\n");
  12 }
  13
  14 int find_cmd(name) char *name;
  15 {
  16    int i;   char *p;
  17    i = 0;   p = cmd[0];
  18    while (p){
  19          if (strcmp(p, name)==0)
  20             return i;
  21          i++;  p = cmd[i];
  22    }
  23    return(-1);
  24 }
  25
  26
  27 int getpid()
  28 {
  29    return syscall(0,0,0);
  30 }
  31
  32 int ps()
  33 {
  34    syscall(1, 0, 0);
  35 }
  36
  37 int chname()
  38 {
  39     char s[64];
  40     printf("\ninput new name : ");
  41     gets(s);
  42     syscall(2, s, 0);
  43 }
  44
  45 int kmode()
  46 {
  47     printf("kmode : enter Kmode via INT 80\n");
  48     printf("proc %d going K mode ....\n", getpid());
  49         syscall(3, 0, 0);
  50     printf("proc %d back from Kernel\n", getpid());
  51 }
  52
  53 int kswitch()
  54 {
  55     printf("proc %d enter Kernel to switch proc\n", getpid());
  56         syscall(4,0,0);
  57     printf("proc %d back from Kernel\n", getpid());
  58 }
  59
  60 int wait()
  61 {
  62     int child, exitValue;
  63     printf("proc %d enter Kernel to wait for a child to die\n", getpid());
  64     child = syscall(5, &exitValue, 0);
  65     printf("proc %d back from wait, dead child=%d", getpid(), child);
  66     if (child>=0)
  67         printf("exitValue=%d", exitValue);
  68     printf("\n");
  69 }
  70
  71 int die()
  72 {
  73    char exitValue;
  74    printf("\nenter an exitValue (0-9) : ");
  75    exitValue=getc() - '0';
  76    printf("enter kernel to die with exitValue=%d\n");
  77         syscall(6,exitValue,0);
  78 }
  79
  80 int fork()
  81 {
  82   int child;
  83   child = syscall(7,0,0,0);
  84   if (child)
  85     printf("parent % return form fork, child=%d\n", getpid(), child);
  86   else
  87     printf("child %d return from fork, child=%d\n", getpid(), child);
  88 }
  89
  90 int exec()
  91 {
  92   int r;
  93   char filename[32];
  94   printf("\nenter exec filename : ");
  95   gets(filename);
  96   r = syscall(8,filename,0,0);
  97   printf("exec failed\n");
  98 }
  99
 100 int chcolor()
 101 {
 102   int y;
 103   printf("\ninput color [r|g|c|y] ; ");
 104   y = getc();
 105   syscall(9,y,0);
 106 }
 107
 108 int putc(c) char c;
 109 {
 110   return syscall(10, c, 0, 0);
 111 }
 112
 113 int getc()
 114 {
 115   return syscall(11,0,0,0)&0x7F;
 116 }
 117
 118 char sline[128];
 119
 120 int sin()
 121 {
 122   syscall(12, sline, 0,0);
 123   printf("sline=%s\n", sline);
 124 }
 125
 126 int sout()
 127 {
 128   syscall(13, sline, 0,0);
 129 }
 130
 131
 132 int invalid(name) char *name;
 133 {
 134     printf("Invalid command : %s\n", name);
 135 }
 136