вернуть последний компонент имени пути (return the last component of a pathname)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
basename — return the last component of a pathname
Синопсис (Synopsis)
#include <libgen.h>
char *basename(char *path);
Описание (Description)
The basename() function shall take the pathname pointed to by
path and return a pointer to the final component of the pathname,
deleting any trailing '/' characters.
If the string pointed to by path consists entirely of the '/'
character, basename() shall return a pointer to the string "/".
If the string pointed to by path is exactly "//", it is
implementation-defined whether '/' or "//" is returned.
If path is a null pointer or points to an empty string,
basename() shall return a pointer to the string ".".
The basename() function may modify the string pointed to by path,
and may return a pointer to internal storage. The returned
pointer might be invalidated or the storage might be overwritten
by a subsequent call to basename(). The returned pointer might
also be invalidated if the calling thread is terminated.
The basename() function need not be thread-safe.
Возвращаемое значение (Return value)
The basename() function shall return a pointer to the final
component of path.
Ошибки (Error)
No errors are defined.
The following sections are informative.
Примеры (Examples)
Using basename()
The following program fragment returns a pointer to the value
lib, which is the base name of /usr/lib.
#include <libgen.h>
...
char name[] = "/usr/lib";
char *base;
base = basename(name);
...
Sample Input and Output Strings for the basename() and dirname()
Functions and the basename and dirname Utilities
.TS
┌──────────────┬───────────┬────────────┬──────────────┬─────────────────┬───────────┐
│ basename() │ │ │ basename │ Output │ Output │
│and dirname() │ String │ String │ and dirname │ Written by │Written by │
│Functions path│Returned by│Returned by │ Utilities │ basename │ dirname │
│ Argument │basename() │ dirname() │string Operand│ Utility │ Utility │
├──────────────┼───────────┼────────────┼──────────────┼─────────────────┼───────────┤
│"usr" │"usr" │"." │usr │usr │. │
├──────────────┼───────────┼────────────┼──────────────┼─────────────────┼───────────┤
│"usr/" │"usr" │"." │usr/ │usr │. │
├──────────────┼───────────┼────────────┼──────────────┼─────────────────┼───────────┤
│"" │"." │"." │"" │. or empty string│. │
├──────────────┼───────────┼────────────┼──────────────┼─────────────────┼───────────┤
│"/" │"/" │"/" │/ │/ │/ │
├──────────────┼───────────┼────────────┼──────────────┼─────────────────┼───────────┤
│"//" │"/" or "//"│"/" or "//" │// │/ or // │/ or // │
├──────────────┼───────────┼────────────┼──────────────┼─────────────────┼───────────┤
│"///" │"/" │"/" │/// │/ │/ │
├──────────────┼───────────┼────────────┼──────────────┼─────────────────┼───────────┤
│"/usr/" │"usr" │"/" │/usr/ │usr │/ │
├──────────────┼───────────┼────────────┼──────────────┼─────────────────┼───────────┤
│"/usr/lib" │"lib" │"/usr" │/usr/lib │lib │/usr │
├──────────────┼───────────┼────────────┼──────────────┼─────────────────┼───────────┤
│"//usr//lib//"│"lib" │"//usr" │//usr//lib// │lib │//usr │
├──────────────┼───────────┼────────────┼──────────────┼─────────────────┼───────────┤
│"/home//dwc// │"test" │"/home//dwc"│/home//dwc// │test │/home//dwc │
│test" │ │ │test │ │ │
└───────.─S─H──"─A─P─P┴L─I─C─A─T─I─O─N──U─S─A┴G─E─"──%─%─%─S─H─%─%─%─┴N─o─n─e─.──────────┴─────────────────┴───────────┘
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
dirname(3p)
The Base Definitions volume of POSIX.1‐2017, libgen.h(0p)
The Shell and Utilities volume of POSIX.1‐2017, basename(1p)
