ASSERT(3) Library Functions Manual ASSERT(3)
assert -- expression verification macro
The assert() macro tests the given expression and if it is false, the
calling process is terminated. A diagnostic message, consisting of the
text of the expression, the name of the source file, the line number and
the enclosing function, is written to stderr and the abort(3) function is
called, effectively terminating the program.
If expression is true, the assert() macro does nothing.
The assert() macro may be removed at compile time with the cc(1) option
The following diagnostic message is written to stderr if expression is
"assertion \"%s\" failed: file \"%s\", line %d, function \"%s\"\n", \
"expression", __FILE__, __LINE__, __func__);
cc(1), _DIAGASSERT(3), abort(3)
The assert() macro conforms to ISO/IEC 9899:1999 (``ISO C99'').
A assert macro appeared in Version 6 AT&T UNIX.
Information on the name of the enclosing function appeared in ISO/IEC
9899:1999 (``ISO C99'').
NetBSD 6.1.5 January 22, 2007 NetBSD 6.1.5