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    revision 532 by niro, Sat Sep 1 22:45:15 2007 UTC revision 816 by niro, Fri Apr 24 18:33:46 2009 UTC
    # Line 10  Line 10 
    10  /* BB_AUDIT SUSv3 compliant */  /* BB_AUDIT SUSv3 compliant */
    11  /* http://www.opengroup.org/onlinepubs/007904975/utilities/tty.html */  /* http://www.opengroup.org/onlinepubs/007904975/utilities/tty.html */
    12    
    13  #include <stdio.h>  #include "libbb.h"
     #include <stdlib.h>  
     #include <unistd.h>  
     #include "busybox.h"  
    14    
    15  int tty_main(int argc, char **argv)  int tty_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
    16    int tty_main(int argc, char **argv SKIP_INCLUDE_SUSv2(UNUSED_PARAM))
    17  {  {
    18   const char *s;   const char *s;
    19   int silent; /* Note: No longer relevant in SUSv3. */   USE_INCLUDE_SUSv2(int silent;) /* Note: No longer relevant in SUSv3. */
    20   int retval;   int retval;
    21    
    22   xfunc_error_retval = 2; /* SUSv3 requires > 1 for error. */   xfunc_error_retval = 2; /* SUSv3 requires > 1 for error. */
    23    
    24   silent = getopt32(argc, argv, "s");   USE_INCLUDE_SUSv2(silent = getopt32(argv, "s");)
    25     USE_INCLUDE_SUSv2(argc -= optind;)
    26     SKIP_INCLUDE_SUSv2(argc -= 1;)
    27    
    28   /* gnu tty outputs a warning that it is ignoring all args. */   /* gnu tty outputs a warning that it is ignoring all args. */
    29   bb_warn_ignoring_args(argc - optind);   bb_warn_ignoring_args(argc);
    30    
    31   retval = 0;   retval = 0;
    32    
    33   if ((s = ttyname(0)) == NULL) {   s = ttyname(0);
    34   /* According to SUSv3, ttyname can on fail with EBADF or ENOTTY.   if (s == NULL) {
    35     /* According to SUSv3, ttyname can fail with EBADF or ENOTTY.
    36   * We know the file descriptor is good, so failure means not a tty. */   * We know the file descriptor is good, so failure means not a tty. */
    37   s = "not a tty";   s = "not a tty";
    38   retval = 1;   retval = 1;
    39   }   }
    40     USE_INCLUDE_SUSv2(if (!silent) puts(s);)
    41   if (!silent) {   SKIP_INCLUDE_SUSv2(puts(s);)
      puts(s);  
      }  
    42    
    43   fflush_stdout_and_exit(retval);   fflush_stdout_and_exit(retval);
    44  }  }
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