fnmatch(3) -- Linux man page
NAMEfnmatch - match filename or pathname
#include <fnmatch.h> int fnmatch(const char *pattern, const char *string, int flags);
DESCRIPTIONThe fnmatch() function checks whether the string argument matches the pattern argument, which is a shell wildcard pattern.
The flags argument modifies the behaviour; it is the bitwise OR of zero or more of the following flags:
- If this flag is set, treat backslash as an ordinary character, instead of an escape character.
- If this flag is set, match a slash in string only with a slash in pattern and not, for example, with a  - sequence containing a slash.
- If this flag is set, a leading period in string has to be matched exactly by a period in pattern. A period is considered to be leading if it is the first character in string, or if both FNM_PATHNAME is set and the period immediately follows a slash.
- This is a GNU synonym for FNM_PATHNAME.
- If this flag (a GNU extension) is set, the pattern is considered to be matched if it matches an initial segment of string which is followed by a slash. This flag is mainly for the internal use of glibc and is only implemented in certain cases.
- If this flag (a GNU extension) is set, the pattern is matched case-insensitively.
RETURN VALUEZero if string matches pattern, FNM_NOMATCH if there is no match or another non-zero value if there is an error.
CONFORMING TOISO/IEC 9945-2: 1993 (POSIX.2). The FNM_FILE_NAME, FNM_LEADING_DIR, and FNM_CASEFOLD flags are GNU extensions.
SEE ALSOsh(1), glob(3), scandir(3), glob(7)