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FMTMSG(3)                  Library Functions Manual                  FMTMSG(3)

     fmtmsg - format and display a message

     Standard C Library (libc, -lc)

     #include <fmtmsg.h>

     fmtmsg(long classification, const char *label, int severity,
         const char *text, const char *action, const char *tag);

     The fmtmsg() function can be used to display messages in the specified
     format.  Messages may be written either to standard error, to the
     console, or both.

     A formatted message consists of up to five components specified in label,
     severity, text, action and tag.  Further information such as the origin
     of the message, the recoverability from the condition causing the message
     and where to display the message is specified in classification.

     The classification argument consists of a major classification and
     several sub-classifications.  It has no effect on the content of the
     message displayed.  With the exception of the display sub-classification,
     only a single identifier may be specified for each (sub-)classification.
     The following classifications are available:

     Major classifications
          The source of the condition.  Available identifiers are: MM_HARD
          (hardware), MM_SOFT (software), and MM_FIRM (firmware).

     Message source sub-classifications
          The type of software detecting the condition.  Available identifiers
          are: MM_APPL (application), MM_UTIL (utility), and MM_OPSYS
          (operating system).

     Display sub-classifications
          The displays the formatted messages is to be written to.  Available
          identifiers are: MM_PRINT (standard error stream) and MM_CONSOLE
          (system console).

     Status sub-classifications
          The capability of the calling software to recover from the
          condition.  Available identifiers are: MM_RECOVER (recoverable) and
          MM_NRECOV (non-recoverable).

     If no classification is to be supplied, MM_NULLMC must be specified.

     The label argument identifies the source of the message.  It consists of
     two fields separated by a colon (:).  The first field is up to 10
     characters, the second is up to 14 characters.

     If no label is to be supplied, MM_NULLLBL must be specified.

     The seriousness of the condition causing the message.  The following
     severity levels are available:

           MM_HALT     The software has encountered a severe fault and is

           MM_ERROR    The software has encountered a fault.

           MM_WARNING  The software has encountered an unusual non-fault

           MM_INFO     The software informs about a non-error condition.

     If no severity level is to be supplied, MM_NOSEV must be specified.

     The description of the condition the software encountered.  The character
     string is not limited to a specific size.

     If no text is to be supplied, MM_NOTXT must be specified.

     The first step to be taken to recover from the condition the software
     encountered; it will be preceded by the prefix "TO FIX:".  The character
     string is not limited to a specific size.

     If no action is to be supplied, MM_NOACT must be specified.

     The on-line documentation which provides further information about the
     condition and the message, such as "fmtmsg(3)".  The character string is
     not limited to a specific size.

     If no tag is to be supplied, MM_NOTAG must be specified.

     Further effect on the formatting of the message as displayed on the
     standard error stream (but not on the system console!) may be taken by
     setting the MSGVERB environment variable, which selects the subset of
     message components to be printed.  It consists of a colon-separated list
     of the optional keywords label, severity, text, action, and tag, which
     correspond to the arguments to fmtmsg() with the same names.  If MSGVERB
     is either not set or malformed (containing empty or unknown keywords),
     its content is ignored an all message components will be selected.

     Note that displaying a message on the system console may fail due to
     inappropriate privileges or a non-permissive file mode of the console

     The fmtmsg() function returns one of the following values:

     MM_OK        The function succeeded.

     MM_NOTOK     The function failed completely.

     MM_NOMSG     The function was unable to generate a message on standard
                  error, but otherwise succeeded.

     MM_NOCOM     The function was unable to generate a message on the
                  console, but otherwise succeeded.

     printf(3), syslog(3)

     The fmtmsg() function conforms to X/Open System Interfaces and Headers
     Issue 5 ("XSH5").

NetBSD 9.99                     April 11, 2011                     NetBSD 9.99