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 #include <sys/utsname.h>
  27
  28 /**
  29  * Swaps bytes
  30  *  @param src Source buffer
  31  *  @param dest Destination buffer
  32  *  @param size Size of buffers
  33  */
  34 void swab(const void *src,void *dest,ssize_t size) {
  35   size -= size%2;
  36   if (size>0) {
  37     const char *csrc = (const char*)src;
  38     char *cdest = (char*)dest;
  39     size_t i;
  40     for (i=0;i<size;i++) cdest[size-i-1] = csrc[i];
  41   }
  42 }
  43
  44 unsigned sleep(unsigned sec) {
  45   syscall_call(SYSCALL_TIME_SLEEP,1,sec);
  46   return sec;
  47 }
  48
  49 int usleep(useconds_t usec) {
  50   if (usec<1000000) {
  51     syscall_call(SYSCALL_TIME_USLEEP,1,usec);
  52     return 0;
  53   }
  54   else {
  55     errno = EINVAL;
  56     return -1;
  57   }
  58 }
  59
  60 /*static void alarm_handler(int sig) {
  61   raise(SIGALRM);
  62 }*/
  63
  64 unsigned alarm(unsigned seconds) {
  65   /// @todo call timer syscall
  66   return 0;
  67 }
  68
  69 useconds_t ualarm(useconds_t useconds,useconds_t interval) {
  70   /// @todo call timer syscall
  71   return 0;
  72 }
  73
  74 char *getlogin() {
  75   struct passwd *pwd = getpwuid(getpid());
  76   if (pwd==NULL) return NULL;
  77   else return pwd->pw_name;
  78 }
  79
  80 int gethostname(char *buf,size_t n) {
  81   struct utsname utsbuf;
  82   if (uname(&utsbuf)==0) {
  83     strncpy(buf,utsbuf.nodename,n);
  84     return 0;
  85   }
  86   else return -1;
  87 }