Am 28.08.2016 06:43, schrieb Michael Kerrisk (man-pages): > On 08/27/2016 11:07 PM, walter harms wrote: >> >> >> Am 24.08.2016 02:11, schrieb enh: >>> On Tue, Aug 23, 2016 at 4:52 PM, Michael Kerrisk (man-pages) >>> <mtk.manpages@xxxxxxxxx> wrote: >>>> Hello Elliott >>>> >> >> >> Just one note: >> People are terrible bad at negation. So i would suggest: >> >> If CLONE_FILES is set, the child process share >> all file descriptors opened in the calling process >> at the time of clone(). >> Subsequent operations that open or close file descriptors, >> or change file descriptor flags, performed by either >> the calling process or the child >> process do also affect the other process. >> Note, however, >> that the duplicated file descriptors in the child refer to >> the same open file descriptions as the corresponding file >> descriptors in the calling process, and thus share file >> offsets and files status flags (see open(2)). > > Hi Walter, > > I am having trouble to see what you find wrong, and what you want to change, > since the text comparison is difficult. Could you formulate this as a patch? > > Thanks, > > Michael > > Most people are bad at negations. The patch attempts to reword the description of the CLONE_FILES without describing "what is not does when not set". This changes not the whole file but it should give an idea how it could be done. re, wh ---- diff --git a/man2/clone.2 b/man2/clone.2 index b867961..fd25e38 100644 --- a/man2/clone.2 +++ b/man2/clone.2 @@ -172,6 +172,17 @@ Store the child thread ID at the location in the child's memory. .TP .BR CLONE_FILES " (since Linux 2.0)" + +By default the child process still inherits a copy of all file descriptors +opened in the calling process at the time of +.BR clone (). +The child and parent process can close or change +file descriptors independently. +The duplicated file descriptors in the child refer to the same open file +descriptions as the corresponding file descriptors in the calling process, +and thus share file offsets and files status flags (see +.BR open (2)). + If .B CLONE_FILES is set, the calling process and the child process share the same file @@ -187,20 +198,6 @@ If a process sharing a file descriptor table calls .BR execve (2), its file descriptor table is duplicated (unshared). -If -.B CLONE_FILES -is not set, the child process inherits a copy of all file descriptors -opened in the calling process at the time of -.BR clone (). -Subsequent operations that open or close file descriptors, -or change file descriptor flags, -performed by either the calling -process or the child process do not affect the other process. -Note, however, -that the duplicated file descriptors in the child refer to the same open file -descriptions as the corresponding file descriptors in the calling process, -and thus share file offsets and files status flags (see -.BR open (2)). .TP .BR CLONE_FS " (since Linux 2.0)" If -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
