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• File doc/markdown/Signal.md — part of check-in [a2dd66906f] at 2025-07-26 22:11:17 on branch tip-700 — - added remaining 28 section 3 manual pages in initial markdown versions - removed unusual use of a "typedef ..." line inside the synpsos of UTF.3 - unwrapped lines in Synopsis section of Encoding.3 (user: Torsten size: 905)

---
CommandName: Tcl_SignalId
ManualSection: 3
Version: 8.3
TclPart: Tcl
TclDescription: Tcl Library Procedures
Keywords:
 - signals
 - signal numbers
Copyright:
 - Copyright (c) 2001 ActiveState Tool Corp.
---

# Name

Tcl_SignalId, Tcl_SignalMsg - Convert signal codes

# Synopsis

::: {.synopsis} :::
**#include <tcl.h>**
[const char *]{.ret} [Tcl_SignalId]{.ccmd}[sig]{.cargs}
[const char *]{.ret} [Tcl_SignalMsg]{.ccmd}[sig]{.cargs}
:::

# Arguments

.AP int sig in A POSIX signal number such as **SIGPIPE**. 

# Description

**Tcl_SignalId** and **Tcl_SignalMsg** return a string representation of the provided signal number (*sig*). **Tcl_SignalId** returns a machine-readable textual identifier such as "SIGPIPE". **Tcl_SignalMsg** returns a human-readable string such as "bus error". The strings returned by these functions are statically allocated and the caller must not free or modify them.