Differences between open and fopen in Linux

Differences between open and fopen in Linux: the path and name of the file to be opened in intopen (constchar * path, intaccess, intmode) path www.2cto. comaccess access mode. the macro definition and meaning are as follows :... differences between open and fopen in Linux int open (const char * path, int access, int mode) path specifies the file path to open and the name www.2cto.com access mode. the macro definition and meaning are as follows: o_RDONLY 1 read-only open O_WRONLY 2 write only open O_RDWR 4 read and write Open also can select the following mode and the above three basic mode phase: o_CREAT 0x0100 create a file and open O_TRUNC 0x0200 open an existing file and set the file length to 0, other attributes keep O_EXCL 0x0400 not using O_APPEND 0x0800 Open file O_TEXT 0x4000 open text file translation CR-LF control character O_BINARY 0x8000 open binary character, do not translate CR-LF www.2cto.com mode this parameter is only used in access = O_CREAT mode, the value is as follows: s_IFMT 0xF000 file type mask S_IFDIR 0x4000 directory S_IFIFO 0x1000 FIFO dedicated S_IFCHR 0x2000 character dedicated S_IFBLK 0x3000 block dedicated S_IFREG 0x8000 only 0x0000 S_IREAD 0x0100 readable S_IWRITE 0x0080 writable S_IEXEC 0x0040 executable FILE * fopen (char * filename, char * mode) filename File Name mode open mode: r read-only mode to open a text file rb read-only mode to open a binary file W. open a text file in write-only mode wb open a binary file a append open a text file AB append open a binary file r + read/write open a text file rb + read/write: open a binary file w + read/write create a text file wb + read/write generate a binary file a + read/write append open a text file AB + read/write method to append a binary file www.2cto.com open and fopen: the former is a low-level IO, and the latter is a high-level IO. The former returns a file descriptor, and the latter returns a file pointer. The former has no buffer, and the latter has a buffer. The former works with read and write, and the latter works with fread and fwrite. The latter is expanded based on the former. In most cases, the latter is used.