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wutdevoptab: Add support for opening files with more flag combinations (#322)

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Maschell 2023-06-20 21:36:41 +02:00 committed by GitHub
parent 071345feb2
commit 8df8e18e76
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1 changed files with 10 additions and 0 deletions
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10
libraries/wutdevoptab/devoptab_fsa_open.cpp
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@ -35,6 +35,12 @@ __wut_fsa_open(struct _reent *r,
fsMode = "w";
} else if (((flags & O_ACCMODE) == O_RDWR) && ((flags & commonFlagMask) == (O_CREAT | O_TRUNC))) {
fsMode = "w+";
} else if (((flags & O_ACCMODE) == O_WRONLY) && ((flags & commonFlagMask) == O_CREAT) && (flags & O_EXCL) == O_EXCL) {
// if O_EXCL is set, we don't need O_TRUNC
fsMode = "w";
} else if (((flags & O_ACCMODE) == O_RDWR) && ((flags & commonFlagMask) == O_CREAT) && (flags & O_EXCL) == O_EXCL) {
// if O_EXCL is set, we don't need O_TRUNC
fsMode = "w+";
} else if (((flags & O_ACCMODE) == O_WRONLY) && ((flags & commonFlagMask) == (O_CREAT | O_APPEND))) {
fsMode = "a";
} else if (((flags & O_ACCMODE) == O_RDWR) && ((flags & commonFlagMask) == (O_CREAT | O_APPEND))) {
@ -45,6 +51,10 @@ __wut_fsa_open(struct _reent *r,
// It's not possible to open a file with write only mode which doesn't truncate the file
// Technically we could read from the file, but our read implementation is blocking this.
fsMode = "r+";
} else if (((flags & O_ACCMODE) == O_RDWR) && ((flags & commonFlagMask) == (O_CREAT))) {
// Cafe OS doesn't have a matching mode for this, so we have to be creative and create the file.
createFileIfNotFound = true;
fsMode = "r+";
} else if (((flags & O_ACCMODE) == O_WRONLY) && ((flags & commonFlagMask) == (O_APPEND))) {
// Cafe OS doesn't have a matching mode for this, so we have to check if the file exists.
failIfFileNotFound = true;