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ERRNO

Section: Library functions (3)
Updated: 30 March 1998
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errno - ºÇ¸å¤ËȯÀ¸¤·¤¿¥¨¥é¡¼¤ÎÈÖ¹æ  

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#include <errno.h>

extern int errno;  

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int ÊÑ¿ô errno ¤Ë¤Ï¡¢¥·¥¹¥Æ¥à¥³¡¼¥ë(µÚ¤Ó¤¤¤¯¤Ä¤«¤Î¥é¥¤¥Ö¥é¥ê´Ø¿ô)¤Ë¤è¤Ã¤Æ ¥¨¥é¡¼¤Î¸¶°ø¤¬¥»¥Ã¥È¤µ¤ì¤ë¡£ ¤³¤ÎÃͤϥ³¡¼¥ë¤¬¥¨¥é¡¼(Ä̾ï -1)¤òÊÖ¤·¤¿»þ¤Ë¤Î¤ß°ÕÌ£¤ò»ý¤Ä¤¬¡¢ ¥é¥¤¥Ö¥é¥ê´Ø¿ô¤ÏÀ®¸ù¤·¤¿¾ì¹ç¤â errno ¤òÊѹ¹¤¹¤ë¤³¤È¤¬µö¤µ¤ì¤Æ¤¤¤ë¡£

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ISO C standard ¤Ç¤Ï¡¢ errno ¤ÏÊѹ¹²Äǽ¤Êº¸ÊÕÃͤΠint ·¿ ¤È¤·¤ÆÄêµÁ¤µ¤ì¤Æ¤ª¤ê¡¢ÌÀ¼¨Åª¤ÊÄêµÁ¤ò¹Ô¤ï¤Ê¤¯¤Æ¤âÎɤ¤¤³¤È¤Ë¤Ê¤Ã¤Æ¤¤¤ë¡£ ¤Þ¤¿ errno ¤Ï¥Þ¥¯¥í¤Ç¤â¤è¤¤¡£ errno ¤Ï¥¹¥ì¥Ã¥É¤´¤È¤Ë ¥í¡¼¥«¥ë¤Ç¤¢¤ë¡£¤Ä¤Þ¤ê¤¢¤ë¥¹¥ì¥Ã¥É¤Ç errno ¤¬ÀßÄꤵ¤ì¤Æ¤â¡¢ ¤½¤ì¤Ï¾¤Î¥¹¥ì¥Ã¥É¤Ç¤Î errno ¤Ë¤Ï±Æ¶Á¤·¤Ê¤¤¡£

Àµ¤·¤¤¥¨¥é¡¼ÈÖ¹æ¤Ï¤¹¤Ù¤Æ¥¼¥í°Ê³°¤ÎÃͤǤ¢¤ë¡£ errno ¤Ï ¤É¤ó¤Ê¥é¥¤¥Ö¥é¥ê´Ø¿ô¤Ë¤è¤Ã¤Æ¤â 0 ¤Ë¤ÏÀßÄꤵ¤ì¤Ê¤¤¡£ POSIX.1 ¤ÇÄêµÁ¤µ¤ì¤Æ¤¤¤ë¤¹¤Ù¤Æ¤Î¥¨¥é¡¼Ì¾¤Ï¡¢¤¹¤Ù¤ÆÊÌ¡¹¤Î ÈÖ¹æ¤ò»ý¤¿¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£

POSIX.1 (1996 ǯÈÇ) ¤Ç¤Ï°Ê²¼¤Î¥¨¥é¡¼Ì¾¥·¥ó¥Ü¥ë¤¬¥ê¥¹¥È¤µ¤ì¤Æ¤¤¤ë¡£ ¤³¤ì¤é¤Î¤¦¤Á¡¢ EDOM ¤È ERANGE ¤Ï ISO C standard ¤Ë¤¢¤ë¡£ ISO C Amendment 1 ¤Ç¤Ï¡¢¤³¤ì¤é¤Ë²Ã¤¨¤Æ EILSEQ ¤¬ÄêµÁ¤µ¤ì¤Æ¤ª¤ê¡¢ ¥Þ¥ë¥Á¥Ð¥¤¥Èʸ»ú¤ä¥ï¥¤¥Éʸ»ú¤Ç¤Î¥³¡¼¥Ç¥£¥ó¥°¥¨¥é¡¼¤ËÍѤ¤¤é¤ì¤ë¤³¤È¤Ë ¤Ê¤Ã¤Æ¤¤¤ë¡£

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perror(3), strerror(3)


 

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