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file: fd duping and related syscalls

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Matheus
2023-06-26 23:18:49 -03:00
parent e9f5dab300
commit 265d12f6b2
2 changed files with 115 additions and 17 deletions
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kernel-src/sys/syscalls/dup.c
+39
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@@ -0,0 +1,39 @@
#include <kernel/syscalls.h>
#include <kernel/file.h>
#include <errno.h>
syscallret_t syscall_dup(context_t *, int oldfd) {
syscallret_t ret;
int r = -1;
ret.errno = fd_dup(oldfd, 0, false, 0, &r);
ret.ret = r;
return ret;
}
syscallret_t syscall_dup2(context_t *, int oldfd, int newfd) {
syscallret_t ret;
if (oldfd == newfd) {
ret.errno = 0;
ret.ret = newfd;
} else {
int r = -1;
ret.errno = fd_dup(oldfd, newfd, true, 0, &r);
ret.ret = r;
}
return ret;
}
syscallret_t syscall_dup3(context_t *, int oldfd, int newfd, int flags) {
syscallret_t ret;
if (oldfd == newfd) {
ret.errno = EINVAL;
ret.ret = -1;
} else {
int r = -1;
ret.errno = fd_dup(oldfd, newfd, true, flags, &r);
ret.ret = r;
}
return ret;
}