1 /* 2 ** Distributed under the terms of the Haiku License. 3 */ 4 #ifndef _FCNTL_H 5 #define _FCNTL_H 6 7 8 #include <sys/types.h> 9 #include <sys/stat.h> 10 #include <unistd.h> 11 12 13 /* commands that can be passed to fcntl() */ 14 #define F_DUPFD 0x0001 /* duplicate fd */ 15 #define F_GETFD 0x0002 /* get fd flags */ 16 #define F_SETFD 0x0004 /* set fd flags */ 17 #define F_GETFL 0x0008 /* get file status flags and access mode */ 18 #define F_SETFL 0x0010 /* set file status flags */ 19 #define F_GETLK 0x0020 /* get locking information */ 20 #define F_RDLCK 0x0040 /* read or shared lock */ 21 #define F_SETLK 0x0080 /* set locking information */ 22 #define F_SETLKW 0x0100 /* as above, but waits if blocked */ 23 #define F_UNLCK 0x0200 /* unlock */ 24 #define F_WRLCK 0x0400 /* write or exclusive lock */ 25 26 /* file descriptor flags for fcntl() */ 27 #define FD_CLOEXEC 1 /* close on exec */ 28 29 /* file access modes for open() */ 30 #define O_RDONLY 0x0000 /* read only */ 31 #define O_WRONLY 0x0001 /* write only */ 32 #define O_RDWR 0x0002 /* read and write */ 33 #define O_ACCMODE 0x0003 /* mask to get the access modes above */ 34 #define O_RWMASK O_ACCMODE 35 36 /* flags for open() */ 37 #define O_EXCL 0x0100 /* exclusive creat */ 38 #define O_CREAT 0x0200 /* create and open file */ 39 #define O_TRUNC 0x0400 /* open with truncation */ 40 #define O_NOCTTY 0x1000 /* currently unsupported */ 41 #define O_NOTRAVERSE 0x2000 /* do not traverse leaf link */ 42 43 /* flags for open() and fcntl() */ 44 #define O_CLOEXEC 0x00000040 /* close on exec */ 45 #define O_NONBLOCK 0x00000080 /* non blocking io */ 46 #define O_APPEND 0x00000800 /* to end of file */ 47 #define O_TEXT 0x00004000 /* CR-LF translation */ 48 #define O_BINARY 0x00008000 /* no translation */ 49 #define O_SYNC 0x00010000 /* write synchronized I/O file integrity */ 50 #define O_RSYNC 0x00020000 /* read synchronized I/O file integrity */ 51 #define O_DSYNC 0x00040000 /* write synchronized I/O data integrity */ 52 53 // ToDo: currently not implemented additions: 54 #define O_NOFOLLOW 0x00080000 55 /* should we implement this? it's similar to O_NOTRAVERSE but will fail on symlinks */ 56 #define O_NOCACHE 0x00100000 /* doesn't use the file system cache if possible */ 57 #define O_DIRECT O_NOCACHE 58 #define O_MOUNT 0x00200000 /* for file systems */ 59 #define O_TEMPORARY 0x00400000 /* used to avoid writing temporary files to disk */ 60 #define O_SHLOCK 0x01000000 /* obtain shared lock */ 61 #define O_EXLOCK 0x02000000 /* obtain exclusive lock */ 62 63 64 /* advisory file locking */ 65 66 struct flock { 67 short l_type; 68 short l_whence; 69 off_t l_start; 70 off_t l_len; 71 pid_t l_pid; 72 }; 73 74 #define LOCK_SH 0x01 /* shared file lock */ 75 #define LOCK_EX 0x02 /* exclusive file lock */ 76 #define LOCK_NB 0x04 /* don't block when locking */ 77 #define LOCK_UN 0x08 /* unlock file */ 78 79 #define S_IREAD 0x0100 /* owner may read */ 80 #define S_IWRITE 0x0080 /* owner may write */ 81 82 83 #ifdef __cplusplus 84 extern "C" { 85 #endif 86 87 extern int creat(const char *path, mode_t mode); 88 extern int open(const char *pathname, int oflags, ...); 89 /* the third argument is the permissions of the created file when O_CREAT 90 is passed in oflags */ 91 92 extern int fcntl(int fd, int op, ...); 93 94 #ifdef __cplusplus 95 } 96 #endif 97 98 #endif /* _FCNTL_H */ 99