Execute a regular expression
Synopsis:
#include <unix.h>
int re_exec( char *s );
Arguments:
- s
- A pointer to the string that you want to compare to the current regular expression.
This string must end with a null byte and may include newline characters.
Library:
libregex
Use the -l regex option to
qcc
to link against this library.
Description:
The re_exec() function compares the string pointed to by the
string argument with the last regular expression passed to
re_comp().
The re_comp() and re_exec() functions support
simple regular expressions.
The regular expressions of the form \{m\},
\{m,\}, or \{m,n\} aren't supported.
Returns:
- 1
- The string matches the last compiled regular expression.
- 0
- The string doesn't match the last compiled regular expression.
- -1
- The compiled regular expression is invalid (indicating an internal error).
Classification:
Legacy Unix
| Safety: |
|
|---|
| Cancellation point |
No |
| Interrupt handler |
No |
| Signal handler |
Yes |
| Thread |
Yes |