i86/mtx/mtx/samples/LAB5.timer/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 *\n");
  10    /*         1     2      3       4      5     6    7     8      9   */
  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 uwait()
  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 exit(v) int v;
  81 {
  82   syscall(99, v, 0);
  83 }
  84
  85 int ufork()
  86 {
  87   int child;
  88   child = syscall(7,0,0,0);
  89   if (child)
  90     printf("parent % return form fork, child=%d\n", getpid(), child);
  91   else
  92     printf("child %d return from fork, child=%d\n", getpid(), child);
  93 }
  94
  95 int uexec()
  96 {
  97   int r;
  98   char filename[32];
  99   printf("\nenter exec filename : ");
 100   gets(filename);
 101   r = syscall(8,filename,0,0);
 102   printf("exec failed\n");
 103 }
 104
 105 int chcolor()
 106 {
 107   int y;
 108   printf("\ninput color [r|g|c|y] ; ");
 109   y = getc();
 110   syscall(9,y,0);
 111 }
 112
 113 int putc(c) char c;
 114 {
 115   return syscall(10, c, 0, 0);
 116 }
 117
 118 int invalid(name) char *name;
 119 {
 120     printf("Invalid command : %s\n", name);
 121 }
 122