source3/lib/dprintf.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    display print functions
   4    Copyright (C) Andrew Tridgell 2001
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20
  21 /*
  22   this module provides functions for printing internal strings in the "display charset"
  23   This charset may be quite different from the chosen unix charset
  24
  25   Eventually these functions will need to take care of column count constraints
  26
  27   The d_ prefix on print functions in Samba refers to the display character set
  28   conversion
  29 */
  30
  31 #include "includes.h"
  32
  33  int d_vfprintf(FILE *f, const char *format, va_list ap)
  34 {
  35         char *p = NULL, *p2 = NULL;
  36         int ret, maxlen, clen;
  37         const char *msgstr;
  38         va_list ap2;
  39
  40         va_copy(ap2, ap);
  41
  42         /* do any message translations */
  43         msgstr = lang_msg(format);
  44         if (!msgstr) {
  45                 ret = -1;
  46                 goto out;
  47         }
  48
  49         ret = vasprintf(&p, msgstr, ap2);
  50
  51         lang_msg_free(msgstr);
  52
  53         if (ret <= 0) {
  54                 ret = -1;
  55                 goto out;
  56         }
  57
  58         /* now we have the string in unix format, convert it to the display
  59            charset, but beware of it growing */
  60         maxlen = ret*2;
  61 again:
  62         p2 = (char *)SMB_MALLOC(maxlen);
  63         if (!p2) {
  64                 ret = -1;
  65                 goto out;
  66         }
  67
  68         clen = convert_string(CH_UNIX, CH_DISPLAY, p, ret, p2, maxlen, True);
  69         if (clen == -1) {
  70                 ret = -1;
  71                 goto out;
  72         }
  73
  74         if (clen >= maxlen) {
  75                 /* it didn't fit - try a larger buffer */
  76                 maxlen *= 2;
  77                 SAFE_FREE(p2);
  78                 goto again;
  79         }
  80
  81         /* good, its converted OK */
  82         ret = fwrite(p2, 1, clen, f);
  83 out:
  84
  85         SAFE_FREE(p);
  86         SAFE_FREE(p2);
  87         va_end(ap2);
  88
  89         return ret;
  90 }
  91
  92
  93  int d_fprintf(FILE *f, const char *format, ...)
  94 {
  95         int ret;
  96         va_list ap;
  97
  98         va_start(ap, format);
  99         ret = d_vfprintf(f, format, ap);
 100         va_end(ap);
 101
 102         return ret;
 103 }
 104
 105 static FILE *outfile;
 106
 107  int d_printf(const char *format, ...)
 108 {
 109         int ret;
 110         va_list ap;
 111
 112         if (!outfile) outfile = stdout;
 113
 114         va_start(ap, format);
 115         ret = d_vfprintf(outfile, format, ap);
 116         va_end(ap);
 117
 118         return ret;
 119 }
 120
 121 /* interactive programs need a way of tell d_*() to write to stderr instead
 122    of stdout */
 123 void display_set_stderr(void)
 124 {
 125         outfile = stderr;
 126 }