apps/lib/stdlibc/unistd.c

   1 /*
   2     meinOS - A unix-like x86 microkernel operating system
   3     Copyright (C) 2008  Janosch Gräf <janosch.graef@gmx.net>
   4
   5     This program is free software: you can redistribute it and/or modify
   6     it under the terms of the GNU Lesser General Public License as published by
   7     the Free Software Foundation, either version 3 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU Lesser General Public License for more details.
  14
  15     You should have received a copy of the GNU Lesser General Public License
  16     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #include <sys/types.h>
  20 #include <string.h>
  21 #include <unistd.h>
  22 #include <syscall.h>
  23 #include <signal.h>
  24 #include <errno.h>
  25 #include <pwd.h>
  26
  27 /**
  28  * Swaps bytes
  29  *  @param src Source buffer
  30  *  @param dest Destination buffer
  31  *  @param size Size of buffers
  32  */
  33 void swab(const void *src,void *dest,ssize_t size) {
  34   size -= size%2;
  35   if (size>0) {
  36     const char *csrc = (const char*)src;
  37     char *cdest = (char*)dest;
  38     size_t i;
  39     for (i=0;i<size;i++) cdest[size-i-1] = csrc[i];
  40   }
  41 }
  42
  43 unsigned sleep(unsigned sec) {
  44   syscall_call(SYSCALL_TIME_SLEEP,1,sec);
  45   return sec;
  46 }
  47
  48 int usleep(useconds_t usec) {
  49   if (usec<1000000) {
  50     syscall_call(SYSCALL_TIME_USLEEP,1,usec);
  51     return 0;
  52   }
  53   else {
  54     errno = EINVAL;
  55     return -1;
  56   }
  57 }
  58
  59 /*static void alarm_handler(int sig) {
  60   raise(SIGALRM);
  61 }*/
  62
  63 unsigned alarm(unsigned seconds) {
  64   /// @todo call timer syscall
  65   return 0;
  66 }
  67
  68 useconds_t ualarm(useconds_t useconds,useconds_t interval) {
  69   /// @todo call timer syscall
  70   return 0;
  71 }
  72
  73 char *getlogin() {
  74   struct passwd *pwd = getpwuid(getpid());
  75   if (pwd==NULL) return NULL;
  76   else return pwd->pw_name;
  77 }