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Add O_NONBLOCK.

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This commit is contained in:
Jonas 'Sortie' Termansen 2013-03-31 17:18:42 +02:00
parent ed5f14878d
commit 1052f2c47a
4 changed files with 11 additions and 4 deletions
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7
sortix/descriptor.cpp
View file

@ -31,7 +31,6 @@
#include <sortix/kernel/descriptor.h>
#include <sortix/kernel/fsfunc.h>
#include <sortix/kernel/string.h>
#include <sortix/kernel/copy.h> // DEBUG
#include <sortix/dirent.h>
#include <sortix/fcntl.h>
#include <sortix/seek.h>
@ -50,7 +49,7 @@ const int ACCESS_FLAGS = O_READ | O_WRITE | O_EXEC | O_SEARCH;
const int OPEN_FLAGS = O_CREAT | O_DIRECTORY | O_EXCL | O_TRUNC;
// Flags that only make sense for descriptors.
const int DESCRIPTOR_FLAGS = O_APPEND;
const int DESCRIPTOR_FLAGS = O_APPEND | O_NONBLOCK;
bool LinkInodeInDir(ioctx_t* ctx, Ref<Descriptor> dir, const char* name,
Ref<Inode> inode)
@ -218,6 +217,7 @@ ssize_t Descriptor::read(ioctx_t* ctx, uint8_t* buf, size_t count)
return errno = EPERM, -1;
if ( !count ) { return 0; }
if ( (size_t) SSIZE_MAX < count ) { count = SSIZE_MAX; }
ctx->dflags = dflags;
if ( !IsSeekable() )
return vnode->read(ctx, buf, count);
// TODO: Locking here only allows one task to read/write at once.
@ -235,6 +235,7 @@ ssize_t Descriptor::pread(ioctx_t* ctx, uint8_t* buf, size_t count, off_t off)
if ( off < 0 ) { errno = EINVAL; return -1; }
if ( !count ) { return 0; }
if ( SSIZE_MAX < count ) { count = SSIZE_MAX; }
ctx->dflags = dflags;
return vnode->pread(ctx, buf, count, off);
}
@ -244,6 +245,7 @@ ssize_t Descriptor::write(ioctx_t* ctx, const uint8_t* buf, size_t count)
return errno = EPERM, -1;
if ( !count ) { return 0; }
if ( SSIZE_MAX < count ) { count = SSIZE_MAX; }
ctx->dflags = dflags;
if ( !IsSeekable() )
return vnode->write(ctx, buf, count);
// TODO: Locking here only allows one task to read/write at once.
@ -265,6 +267,7 @@ ssize_t Descriptor::pwrite(ioctx_t* ctx, const uint8_t* buf, size_t count, off_t
if ( off < 0 ) { errno = EINVAL; return -1; }
if ( !count ) { return 0; }
if ( SSIZE_MAX < count ) { count = SSIZE_MAX; }
ctx->dflags = dflags;
return vnode->pwrite(ctx, buf, count, off);
}

5
sortix/include/sortix/fcntl.h
View file

@ -22,8 +22,8 @@
*******************************************************************************/
#ifndef SORTIX_FCNTL_H
#define SORTIX_FCNTL_H
#ifndef INCLUDE_SORTIX_FCNTL_H
#define INCLUDE_SORTIX_FCNTL_H
#include <features.h>
@ -42,6 +42,7 @@ __BEGIN_DECLS
#define O_TRUNC (1<<8)
#define O_CLOFORK (1<<9)
#define O_SEARCH (1<<10)
#define O_NONBLOCK (1<<11)
// TODO: O_NOFOLLOW.
#define FD_CLOEXEC (1<<0)

1
sortix/include/sortix/kernel/ioctx.h
View file

@ -37,6 +37,7 @@ struct ioctx_struct
gid_t gid, auth_gid;
bool (*copy_to_dest)(void* dest, const void* src, size_t n);
bool (*copy_from_src)(void* dest, const void* src, size_t n);
int dflags;
};
typedef struct ioctx_struct ioctx_t;

2
sortix/ioctx.cpp
View file

@ -38,6 +38,7 @@ void SetupUserIOCtx(ioctx_t* ctx)
ctx->gid = ctx->auth_gid = process->gid;
ctx->copy_to_dest = CopyToUser;
ctx->copy_from_src = CopyFromUser;
ctx->dflags = 0;
}
void SetupKernelIOCtx(ioctx_t* ctx)
@ -48,6 +49,7 @@ void SetupKernelIOCtx(ioctx_t* ctx)
ctx->gid = ctx->auth_gid = process->gid;
ctx->copy_to_dest = CopyToKernel;
ctx->copy_from_src = CopyFromKernel;
ctx->dflags = 0;
}
} // namespace Sortix