external/ibm-public/postfix/dist/src/global/mail_task.c

   1 /*      $NetBSD$        */
   2
   3 /*++
   4 /* NAME
   5 /*      mail_task 3
   6 /* SUMMARY
   7 /*      set task name for logging purposes
   8 /* SYNOPSIS
   9 /*      #include <mail_task.h>
  10 /*
  11 /*      const char *mail_task(argv0)
  12 /*      const char *argv0;
  13 /* DESCRIPTION
  14 /*      mail_task() enforces consistent naming of mailer processes.
  15 /*      It strips pathname information from the process name, and
  16 /*      prepends the name of the mail system so that logfile entries
  17 /*      are easier to recognize. The mail system name is specified
  18 /*      with the "syslog_name" configuration parameter.
  19 /*
  20 /*      The result is volatile.  Make a copy of the result if it is
  21 /*      to be used for any appreciable amount of time.
  22 /* LICENSE
  23 /* .ad
  24 /* .fi
  25 /*      The Secure Mailer license must be distributed with this software.
  26 /* AUTHOR(S)
  27 /*      Wietse Venema
  28 /*      IBM T.J. Watson Research
  29 /*      P.O. Box 704
  30 /*      Yorktown Heights, NY 10598, USA
  31 /*--*/
  32
  33 /* System library. */
  34
  35 #include <sys_defs.h>
  36 #include <string.h>
  37
  38 /* Utility library. */
  39
  40 #include <vstring.h>
  41 #include <safe.h>
  42
  43 /* Global library. */
  44
  45 #include "mail_params.h"
  46 #include "mail_conf.h"
  47 #include "mail_task.h"
  48
  49 /* mail_task - clean up and decorate the process name */
  50
  51 const char *mail_task(const char *argv0)
  52 {
  53     static VSTRING *canon_name;
  54     const char *slash;
  55     const char *tag;
  56
  57     if (canon_name == 0)
  58         canon_name = vstring_alloc(10);
  59     if ((slash = strrchr(argv0, '/')) != 0 && slash[1])
  60         argv0 = slash + 1;
  61     /* Setenv()-ed from main.cf, or inherited from master. */
  62     if ((tag = safe_getenv(CONF_ENV_LOGTAG)) == 0)
  63         /* Check main.cf settings directly, in case set-gid. */
  64         tag = var_syslog_name ? var_syslog_name :
  65             mail_conf_eval(DEF_SYSLOG_NAME);
  66     vstring_sprintf(canon_name, "%s/%s", tag, argv0);
  67     return (vstring_str(canon_name));
  68 }