1 #ifndef _FCNTL_H
2 #define _FCNTL_H
3
4 #include <sys/types.h> // 绫诲瀷澶存枃浠躲�傚畾涔変簡鍩烘湰鐨勭郴缁熸暟鎹被鍨嬨��
5
6 /* open/fcntl - NOCTTY, NDELAY isn't implemented yet */
/* open/fcntl - NOCTTY鍜�NDELAY鐜板湪杩樻病鏈夊疄鐜� */
7 #define O_ACCMODE 00003 // 鏂囦欢璁块棶妯″紡灞忚斀鐮併��
// 鎵撳紑鏂囦欢open()鍜屾枃浠舵帶鍒跺嚱鏁�fcntl()浣跨敤鐨勬枃浠惰闂ā寮忋�傚悓鏃跺彧鑳戒娇鐢ㄤ笁鑰呬箣涓�銆�
8 #define O_RDONLY 00 // 浠ュ彧璇绘柟寮忔墦寮�鏂囦欢銆�
9 #define O_WRONLY 01 // 浠ュ彧鍐欐柟寮忔墦寮�鏂囦欢銆�
10 #define O_RDWR 02 // 浠ヨ鍐欐柟寮忔墦寮�鏂囦欢銆�
// 涓嬮潰鏄枃浠跺垱寤哄拰鎿嶄綔鏍囧織锛岀敤浜�open()銆傚彲涓庝笂闈㈣闂ā寮忕敤'浣嶆垨'鐨勬柟寮忎竴璧蜂娇鐢ㄣ��
11 #define O_CREAT 00100 /* not fcntl */ // 濡傛灉鏂囦欢涓嶅瓨鍦ㄥ氨鍒涘缓銆�fcntl鍑芥暟涓嶇敤銆�
12 #define O_EXCL 00200 /* not fcntl */ // 鐙崰浣跨敤鏂囦欢鏍囧織銆�
13 #define O_NOCTTY 00400 /* not fcntl */ // 涓嶅垎閰嶆帶鍒剁粓绔��
14 #define O_TRUNC 01000 /* not fcntl */ // 鑻ユ枃浠跺凡瀛樺湪涓旀槸鍐欐搷浣滐紝鍒欓暱搴︽埅涓�0銆�
15 #define O_APPEND 02000 // 浠ユ坊鍔犳柟寮忔墦寮�锛屾枃浠舵寚閽堢疆涓烘枃浠跺熬銆�
16 #define O_NONBLOCK 04000 /* not fcntl */ // 闈為樆濉炴柟寮忔墦寮�鍜屾搷浣滄枃浠躲��
17 #define O_NDELAY O_NONBLOCK // 闈為樆濉炴柟寮忔墦寮�鍜屾搷浣滄枃浠躲��
18
19 /* Defines for fcntl-commands. Note that currently
20 * locking isn't supported, and other things aren't really
21 * tested.
22 */
/* 涓嬮潰瀹氫箟浜�fcntl鐨勫懡浠ゃ�傛敞鎰忕洰鍓嶉攣瀹氬懡浠よ繕娌℃湁鏀寔锛岃�屽叾浠�
* 鍛戒护瀹為檯涓婅繕娌℃湁娴嬭瘯杩囥��
*/
// 鏂囦欢鍙ユ焺(鎻忚堪绗�)鎿嶄綔鍑芥暟fcntl()鐨勫懡浠わ紙cmd锛夈��
23 #define F_DUPFD 0 /* dup */ // 鎷疯礉鏂囦欢鍙ユ焺涓烘渶灏忔暟鍊肩殑鍙ユ焺銆�
24 #define F_GETFD 1 /* get f_flags */ // 鍙栧彞鏌勬爣蹇椼�備粎1涓爣蹇�FD_CLOEXEC銆�
25 #define F_SETFD 2 /* set f_flags */ // 璁剧疆鏂囦欢鍙ユ焺鏍囧織銆�
26 #define F_GETFL 3 /* more flags (cloexec) */ // 鍙栨枃浠剁姸鎬佹爣蹇楀拰璁块棶妯″紡銆�
27 #define F_SETFL 4 // 璁剧疆鏂囦欢鐘舵�佹爣蹇楀拰璁块棶妯″紡銆�
// 涓嬮潰鏄枃浠堕攣瀹氬懡浠ゃ��fcntl()鐨勭涓変釜鍙傛暟lock鏄寚鍚�flock缁撴瀯鐨勬寚閽堛��
28 #define F_GETLK 5 /* not implemented */ // 杩斿洖闃绘閿佸畾鐨�flock缁撴瀯銆�
29 #define F_SETLK 6 // 璁剧疆(F_RDLCK鎴�F_WRLCK)鎴栨竻闄�(F_UNLCK)閿佸畾銆�
30 #define F_SETLKW 7 // 绛夊緟璁剧疆鎴栨竻闄ら攣瀹氥��
31
32 /* for F_[GET|SET]FL */
/* 鐢ㄤ簬 F_GETFL鎴�F_SETFL */
// 鍦ㄦ墽琛�exec()绨囧嚱鏁版椂闇�瑕佸叧闂殑鏂囦欢鍙ユ焺銆�(鎵ц鏃跺叧闂� - Close On EXECution)
33 #define FD_CLOEXEC 1 /* actually anything with low bit set goes */
/* 瀹為檯涓婂彧瑕佷綆浣嶄负1鍗冲彲 */
34
35 /* Ok, these are locking features, and aren't implemented at any
36 * level. POSIX wants them.
37 */
/* OK锛屼互涓嬫槸閿佸畾绫诲瀷锛屼换浣曞嚱鏁颁腑閮借繕娌℃湁瀹炵幇銆�POSIX鏍囧噯瑕佹眰杩欎簺绫诲瀷銆�
*/
38 #define F_RDLCK 0 // 鍏变韩鎴栬鏂囦欢閿佸畾銆�
39 #define F_WRLCK 1 // 鐙崰鎴栧啓鏂囦欢閿佸畾銆�
40 #define F_UNLCK 2 // 鏂囦欢瑙ｉ攣銆�
41
42 /* Once again - not implemented, but ... */
/* 鍚屾牱 - 涔熻繕娌℃湁瀹炵幇锛屼絾鏄�... */
// 鏂囦欢閿佸畾鎿嶄綔鏁版嵁缁撴瀯銆傛弿杩颁簡鍙楀奖鍝嶆枃浠舵鐨勭被鍨�(l_type)銆佸紑濮嬪亸绉�(l_whence)銆�
// 鐩稿鍋忕Щ(l_start)銆侀攣瀹氶暱搴�(l_len)鍜屽疄鏂介攣瀹氱殑杩涚▼id銆�
43 struct flock {
44 short l_type; // 閿佸畾绫诲瀷锛�F_RDLCK锛�F_WRLCK锛�F_UNLCK锛夈��
45 short l_whence; // 寮�濮嬪亸绉�(SEEK_SET锛�SEEK_CUR鎴�SEEK_END)銆�
46 off_t l_start; // 闃诲閿佸畾鐨勫紑濮嬪銆傜浉瀵瑰亸绉伙紙瀛楄妭鏁帮級銆�
47 off_t l_len; // 闃诲閿佸畾鐨勫ぇ灏忥紱濡傛灉鏄�0鍒欎负鍒版枃浠舵湯灏俱��
48 pid_t l_pid; // 鍔犻攣鐨勮繘绋�id銆�
49 };
50
// 浠ヤ笅鏄娇鐢ㄤ笂杩版爣蹇楁垨鍛戒护鐨勫嚱鏁板師鍨嬨��
// 鍒涘缓鏂版枃浠舵垨閲嶅啓涓�涓凡瀛樺湪鏂囦欢銆�
// 鍙傛暟filename鏄鍒涘缓鏂囦欢鐨勬枃浠跺悕锛�mode鏄垱寤烘枃浠剁殑灞炴�э紙瑙�include/sys/stat.h锛夈��
51 extern int creat(const char * filename,mode_t mode);
// 鏂囦欢鍙ユ焺鎿嶄綔锛屼細褰卞搷鏂囦欢鐨勬墦寮�銆�
// 鍙傛暟fildes鏄枃浠跺彞鏌勶紝cmd鏄搷浣滃懡浠わ紝瑙佷笂闈�23--30琛屻�傝鍑芥暟鍙湁浠ヤ笅鍑犵褰㈠紡锛�
// int fcntl(int fildes, int cmd);
// int fcntl(int fildes, int cmd, long arg);
// int fcntl(int fildes, int cmd, struct flock *lock);
52 extern int fcntl(int fildes,int cmd, ...);
// 鎵撳紑鏂囦欢銆傚湪鏂囦欢涓庢枃浠跺彞鏌勪箣闂村缓绔嬭仈绯汇��
// 鍙傛暟filename鏄鎵撳紑鏂囦欢鐨勬枃浠跺悕锛�flags鏄笂闈�7-17琛屼笂鐨勬爣蹇楃殑缁勫悎銆�
53 extern int open(const char * filename, int flags, ...);
54
55 #endif
56