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https://github.com/Mathewnd/Astral.git
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Matheus
31 lines
590 B
C
31 lines
590 B
C
#include <kernel/syscalls.h>
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#include <mutex.h>
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syscallret_t syscall_ftruncate(int fd, size_t size) {
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syscallret_t ret = {
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.ret = -1
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};
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file_t *file = fd_get(fd);
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if (file == NULL) {
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ret.errno = EBADF;
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return ret;
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}
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if ((file->flags & FILE_WRITE) == 0 || file->vnode->type != V_TYPE_REGULAR) {
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ret.errno = EINVAL;
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goto cleanup;
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}
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MUTEX_ACQUIRE(&file->vnode->sizelock, false);
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ret.errno = VOP_RESIZE(file->vnode, size, &_cpu()->thread->proc->cred);
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MUTEX_RELEASE(&file->vnode->sizelock);
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ret.ret = ret.errno ? -1 : 0;
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cleanup:
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fd_release(file);
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return ret;
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}
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