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fs/dup/dup2: don't add O_CLOEXEC for new file descriptor

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refs: https://man7.org/linux/man-pages/man2/dup.2.html

The two file descriptors do not share file descriptor flags (the
close-on-exec flag).  The close-on-exec flag (FD_CLOEXEC; see
fcntl(2)) for the duplicate descriptor is off.

Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
This commit is contained in:
dongjiuzhu1
2023-10-21 21:46:54 +08:00
committed by Xiang Xiao
parent 5c98649a7a
commit dc2dac2377
1 changed files with 4 additions and 1 deletions
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fs/vfs/fs_dup2.c
+4 -1
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@@ -83,7 +83,10 @@ int file_dup2(FAR struct file *filep1, FAR struct file *filep2)
/* Then clone the file structure */ /* Then clone the file structure */
memset(&temp, 0, sizeof(temp)); memset(&temp, 0, sizeof(temp));
temp.f_oflags = filep1->f_oflags;
/* The two filep don't share flags (the close-on-exec flag). */
temp.f_oflags = filep1->f_oflags & ~O_CLOEXEC;
temp.f_pos = filep1->f_pos; temp.f_pos = filep1->f_pos;
temp.f_inode = inode; temp.f_inode = inode;