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basename

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dirname, basename - ¥Ñ¥¹Ì¾¤ò²òÀϤ·¤Æ³ÆÉôʬ¤ò¼è¤ê½Ð¤¹

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#include <libgen.h>



char *dirname(char *path);




char *basename(char *path);

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path            dirname         basename

"/usr/lib"      "/usr"          "lib"

"/usr/"         "/"             "usr"

"usr"           "."             "usr"

"/"             "/"             "/"

"."             "."             "."

".."            "."             ".."

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dirname() ¤È basename() ¤Ï¡¢¤¤¤º¤ì¤â NULL ¤Ç½ªÃ¼¤µ¤ì¤¿Ê¸»úÎó¤Ø¤Î¥Ý¥¤¥ó¥¿¤òÊÖ¤¹¡£

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POSIX.1-2001

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basename() ¤Ë¤Ï 2¼ïÎà¤Î°Û¤Ê¤ë¥Ð¡¼¥¸¥ç¥ó¤¬¤¢¤ë¡£ °ì¤Ä¤Ï¤¹¤Ç¤ËÀâÌÀ¤·¤¿ POSIX ¥Ð¡¼¥¸¥ç¥ó¤Ç¤¢¤ê¡¢ ¤â¤¦°ì¤Ä¤Ï GNU ¥Ð¡¼¥¸¥ç¥ó¤Ç¤¢¤ë¡£ GNU ¥Ð¡¼¥¸¥ç¥ó¤ò»ÈÍѤ¹¤ë¤Ë¤Ï°Ê²¼¤Î¤è¤¦¤Ë¤¹¤ë¡£

    #define _GNU_SOURCE




    #include <string.h>

GNU ¥Ð¡¼¥¸¥ç¥ó¤Ï°ú¤­¿ô¤òÊѹ¹¤¹¤ë¤³¤È¤Ï¤Ê¤¯¡¢ path ¤ÎËöÈø¤¬ '/'¤Î¾ì¹ç¤Ï¶õ¤Îʸ»úÎó¤òÊÖ¤¹¡£ ÆÃ¤Ë path ¤¬ "/" ¤Î¾ì¹ç¤â¶õʸ»úÎó¤òÊÖ¤¹¡£ dirname() ¤Ë¤Ï GNU ¥Ð¡¼¥¸¥ç¥ó¤Ï¤Ê¤¤¡£

glibc ¤Ç¤Ï¡¢ <libgen.h> ¤ò¥¤¥ó¥¯¥ë¡¼¥É¤¹¤ë¤È POSIX ¥Ð¡¼¥¸¥ç¥ó¤Î basename() ¤¬»ÈÍѤµ¤ì¡¢¤½¤ì°Ê³°¤Î¾ì¹ç¤Ï GNU ¥Ð¡¼¥¸¥ç¥ó¤È¤Ê¤ë¡£

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char *dirc, *basec, *bname, *dname;

char *path = "/etc/passwd";



dirc = strdup(path);

basec = strdup(path);

dname = dirname(dirc);

bname = basename(basec);

printf("dirname=%s, basename=%s\n", dname, bname);

´ØÏ¢¹àÌÜ

basename(1), dirname(1), feature_test_macros(7)