Linux 2.6 - man page for re_comp (linux section 3)
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RE_COMP(3) Linux Programmer's Manual RE_COMP(3)
re_comp, re_exec - BSD regex functions
char *re_comp(char *regex);
int re_exec(char *string);
re_comp() is used to compile the null-terminated regular expression pointed to by regex.
The compiled pattern occupies a static area, the pattern buffer, which is overwritten by
subsequent use of re_comp(). If regex is NULL, no operation is performed and the pattern
buffer's contents are not altered.
re_exec() is used to assess whether the null-terminated string pointed to by string
matches the previously compiled regex.
re_comp() returns NULL on successful compilation of regex otherwise it returns a pointer
to an appropriate error message.
re_exec() returns 1 for a successful match, zero for failure.
Multithreading (see pthreads(7))
The re_comp() and re_exec() functions are not thread-safe.
These functions are obsolete; the functions documented in regcomp(3) should be used
regcomp(3), regex(7), GNU regex manual
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GNU 2013-06-21 RE_COMP(3)
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