FSFile_Open()

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FSFile_Open()

FS_FILE *FSFile_Open (CPU_CHAR *name_full,

FS_FLAGS mode

FS_ERR *p_err);

File

Called from

Code enabled by

fs_file.c

Application;

fs_fopen()

N/A

Open a file.

See fs_fopen() for more information.

Arguments

name_full

Name of the file. See section 4-3 “μC/FS File and Directory Names and Paths” on page 62 for information about file names.

mode

File access mode (see Notes #1 and #2).

p_err

Pointer to variable that will the receive return error code from this function:

FS_ERR_NONE

File opened.

FS_ERR_NAME_NULL

Argument name_full passed a NULL pointer.

Or entry error (see Section B.04).

Returned Value

None.

Notes/Warnings

The access mode should be the logical OR of one or more flags :

FS_FILE_ACCESS_MODE_RD

File opened for reads.

FS_FILE_ACCESS_MODE_WR

File opened for writes.

FS_FILE_ACCESS_MODE_CREATE

File will be created, if necessary.

FS_FILE_ACCESS_MODE_TRUNC

File length will be truncated to 0.

FS_FILE_ACCESS_MODE_APPEND

All writes will be performed at EOF.

FS_FILE_ACCESS_MODE_EXCL

File will be opened if and only if it does not already exist.

FS_FILE_ACCESS_MODE_CACHED

File data will be cached.

If FS_FILE_ACCESS_MODE_TRUNC is set, then FS_FILE_ACCESS_MODE_WR must also be set.

If FS_FILE_ACCESS_MODE_EXCL is set, then FS_FILE_ACCESS_MODE_CREATE must also be set.

FS_FILE_ACCESS_MODE_RD and/or FS_FILE_ACCESS_MODE_WR must be set.

The mode string argument of fs_fopen() function can specify a subset of the possible valid modes for this function. The equivalent modes of fs_fopen() mode strings are shown in Table 5-4.

fopen() Mode String	mode Equivalent
“r” or “rb”	FS_FILE_ACCESS_MODE_RD
“w” or “wb”	FS_FILE_ACCESS_MODE_WR \| FS_FILE_ACCESS_MODE_CREATE \| FS_FILE_ACCESS_MODE_TRUNC
“a” or “ab”	FS_FILE_ACCESS_MODE_WR \| FS_FILE_ACCESS_MODE_CREATE \| FS_FILE_ACCESS_MODE_APPEND
“r+” or “rb+” or “r+b”	FS_FILE_ACCESS_MODE_RD \| FS_FILE_ACCESS_MODE_WR
“w+” or “wb+” or “w+b”	FS_FILE_ACCESS_MODE_RD \| FS_FILE_ACCESS_MODE_WR \| FS_FILE_ACCESS_MODE_CREATE \| FS_FILE_ACCESS_MODE_TRUNC
“a+” or “ab+” or “a+b”	FS_FILE_ACCESS_MODE_RD \| FS_FILE_ACCESS_MODE_WR \| FS_FILE_ACCESS_MODE_CREATE \| FS_FILE_ACCESS_MODE_APPEND

1. fs_fopen() mode strings and mode equivalents.