mail_task.c

[詳解]

/*++
/* NAME
/*  mail_task 3
/* SUMMARY
/*  set task name for logging purposes
/* SYNOPSIS
/*  #include <mail_task.h>
/*
/*  const char *mail_task(argv0)
/*  const char *argv0;
/* DESCRIPTION
/*  mail_task() enforces consistent naming of mailer processes.
/*  It strips pathname information from the process name, and
/*  prepends the name of the mail system so that logfile entries
/*  are easier to recognize. The mail system name is specified
/*  with the "syslog_name" configuration parameter.
/*
/*  The result is volatile.  Make a copy of the result if it is
/*  to be used for any appreciable amount of time.
/* LICENSE
/* .ad
/* .fi
/*  The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/*  Wietse Venema
/*  IBM T.J. Watson Research
/*  P.O. Box 704
/*  Yorktown Heights, NY 10598, USA
/*--*/

/* System library. */

#include <sys_defs.h>
#include <string.h>

/* Utility library. */

#include <vstring.h>
#include <safe.h>

/* Global library. */

#include "mail_params.h"
#include "mail_conf.h"
#include "mail_task.h"

/* mail_task - clean up and decorate the process name */

const char *mail_task(const char *argv0)
{
    static VSTRING *canon_name;
    const char *slash;
    const char *tag;

    if (canon_name == 0)
    canon_name = vstring_alloc(10);
    if ((slash = strrchr(argv0, '/')) != 0 && slash[1])
    argv0 = slash + 1;
    /* Setenv()-ed from main.cf, or inherited from master. */
    if ((tag = safe_getenv(CONF_ENV_LOGTAG)) == 0)
    /* Check main.cf settings directly, in case set-gid. */
    tag = var_syslog_name ? var_syslog_name :
        mail_conf_eval(DEF_SYSLOG_NAME);
    vstring_sprintf(canon_name, "%s/%s", tag, argv0);
    return (vstring_str(canon_name));
}