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Comment to explain not opening directories in open()

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def 2016-03-17 22:22:52 +01:00
commit d5c332ffa8
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lib/system/sysio.nim
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@ -289,6 +289,9 @@ proc open(f: var File, filename: string,
var p: pointer = fopen(filename, FormatOpen[mode]) var p: pointer = fopen(filename, FormatOpen[mode])
if p != nil: if p != nil:
when defined(posix) and not defined(nimscript): when defined(posix) and not defined(nimscript):
# How `fopen` handles opening a directory is not specified in ISO C and
# POSIX. We do not want to handle directories as regular files that can
# be opened.
var f2 = cast[File](p) var f2 = cast[File](p)
var res: Stat var res: Stat
if fstat(getFileHandle(f2), res) >= 0'i32 and S_ISDIR(res.st_mode): if fstat(getFileHandle(f2), res) >= 0'i32 and S_ISDIR(res.st_mode):