external/ibm-public/postfix/dist/src/util/msg_vstream.c

   1 /*      $NetBSD$        */
   2
   3 /*++
   4 /* NAME
   5 /*      msg_vstream 3
   6 /* SUMMARY
   7 /*      report diagnostics to VSTREAM
   8 /* SYNOPSIS
   9 /*      #include <msg_vstream.h>
  10 /*
  11 /*      void    msg_vstream_init(progname, stream)
  12 /*      const char *progname;
  13 /*      VSTREAM *stream;
  14 /* DESCRIPTION
  15 /*      This module implements support to report msg(3) diagnostics
  16 /*      to a VSTREAM.
  17 /*
  18 /*      msg_vstream_init() sets the program name that appears in each output
  19 /*      record, and directs diagnostics (see msg(3)) to the specified
  20 /*      VSTREAM. The \fIprogname\fR argument is not copied.
  21 /* SEE ALSO
  22 /*      msg(3)
  23 /* BUGS
  24 /*      No guarantee that long records are written atomically.
  25 /*      Only the last msg_vstream_init() call takes effect.
  26 /* LICENSE
  27 /* .ad
  28 /* .fi
  29 /*      The Secure Mailer license must be distributed with this software.
  30 /* AUTHOR(S)
  31 /*      Wietse Venema
  32 /*      IBM T.J. Watson Research
  33 /*      P.O. Box 704
  34 /*      Yorktown Heights, NY 10598, USA
  35 /*--*/
  36
  37 /* System libraries. */
  38
  39 #include <sys_defs.h>
  40 #include <errno.h>
  41 #include <stdlib.h>                     /* 44BSD stdarg.h uses abort() */
  42 #include <stdarg.h>
  43
  44 /* Utility library. */
  45
  46 #include "vstream.h"
  47 #include "msg.h"
  48 #include "msg_output.h"
  49 #include "msg_vstream.h"
  50
  51  /*
  52   * Private state.
  53   */
  54 static const char *msg_tag;
  55 static VSTREAM *msg_stream;
  56
  57 /* msg_vstream_print - log diagnostic to VSTREAM */
  58
  59 static void msg_vstream_print(int level, const char *text)
  60 {
  61     static const char *level_text[] = {
  62         "info", "warning", "error", "fatal", "panic",
  63     };
  64
  65     if (level < 0 || level >= (int) (sizeof(level_text) / sizeof(level_text[0])))
  66         msg_panic("invalid severity level: %d", level);
  67     if (level == MSG_INFO) {
  68         vstream_fprintf(msg_stream, "%s: %s\n",
  69                         msg_tag, text);
  70     } else {
  71         vstream_fprintf(msg_stream, "%s: %s: %s\n",
  72                         msg_tag, level_text[level], text);
  73     }
  74     vstream_fflush(msg_stream);
  75 }
  76
  77 /* msg_vstream_init - initialize */
  78
  79 void    msg_vstream_init(const char *name, VSTREAM *vp)
  80 {
  81     static int first_call = 1;
  82
  83     msg_tag = name;
  84     msg_stream = vp;
  85     if (first_call) {
  86         first_call = 0;
  87         msg_output(msg_vstream_print);
  88     }
  89 }