This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

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Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html . Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html . IEEE/The Open Group 2017 fmtmsg.h(7POSIX)

The <fmtmsg.h> header shall define the following symbolic constants: MM_HARD Source of the condition is hardware. MM_SOFT Source of the condition is software. MM_FIRM Source of the condition is firmware. MM_APPL Condition detected by application. MM_UTIL Condition detected by utility. MM_OPSYS Condition detected by operating system. MM_RECOVER Recoverable error. MM_NRECOV Non-recoverable error. MM_HALT Error causing application to halt. MM_ERROR Application has encountered a non-fatal fault. MM_WARNING Application has detected unusual non-error condition. MM_INFO Informative message. MM_NOSEV No severity level provided for the message. MM_PRINT Display message on standard error. MM_CONSOLE Display message on system console. The table below indicates the null values and identifiers for fmtmsg() arguments. The <fmtmsg.h> header shall define the symbolic constants in the Identifier column, which shall have the type indicated in the Type column: ┌──────────┬────────┬────────────┬────────────┐ │ Argument │ Type │ Null-Value │ Identifier │ ├──────────┼────────┼────────────┼────────────┤ │ label │ char* │ (char*)0 │ MM_NULLLBL │ │ severity │ int │ 0 │ MM_NULLSEV │ │ class │ long │ 0L │ MM_NULLMC │ │ text │ char* │ (char*)0 │ MM_NULLTXT │ │ action │ char* │ (char*)0 │ MM_NULLACT │ │ tag │ char* │ (char*)0 │ MM_NULLTAG │ └──────────┴────────┴────────────┴────────────┘ The <fmtmsg.h> header shall also define the following symbolic constants for use as return values for fmtmsg(): 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_NOCON The function was unable to generate a console message, but otherwise succeeded. The following shall be declared as a function and may also be defined as a macro. A function prototype shall be provided. int fmtmsg(long, const char *, int, const char *, const char *, const char *); Thefollowingsectionsareinformative.

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fmtmsg.h — message display structures

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

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The System Interfaces volume of POSIX.1‐2017, fmtmsg()

#include <fmtmsg.h>