2491302a04
All of the CloudABI system calls that operate on file descriptors of an arbitrary type are prefixed with fd_. This change adds wrappers for most of these system calls around their FreeBSD equivalents. The dup2() system call present on CloudABI deviates from POSIX, in the sense that it can only be used to replace existing file descriptor. It cannot be used to create new ones. The reason for this is that this is inherently thread-unsafe. Furthermore, there is no need on CloudABI to use fixed file descriptor numbers. File descriptors 0, 1 and 2 have no special meaning. This change exposes the kern_dup() through <sys/syscallsubr.h> and puts the FDDUP_* flags in <sys/filedesc.h>. It then adds a new flag, FDDUP_MUSTREPLACE to force that file descriptors are replaced -- not allocated. Differential Revision: https://reviews.freebsd.org/D3035 Reviewed by: mjg |
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| cloudabi | ||
| cloudabi64 | ||
| freebsd32 | ||
| ia32 | ||
| linprocfs | ||
| linsysfs | ||
| linux | ||
| ndis | ||
| netbsd | ||
| svr4 | ||
| x86bios | ||