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Kernel, libc: Add O_EXCL

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This commit is contained in:
apio 2022-10-27 07:55:59 +02:00
parent 211c76f920
commit 9b0f6b6595
2 changed files with 14 additions and 0 deletions
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12
kernel/src/sys/stdio.cpp
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@ -21,6 +21,7 @@
#define OPEN_TRUNCATED 32 #define OPEN_TRUNCATED 32
#define OPEN_CREATE 64 #define OPEN_CREATE 64
#define OPEN_APPEND 128 #define OPEN_APPEND 128
#define OPEN_EXCL 256
#define SEEK_SET 0 #define SEEK_SET 0
#define SEEK_CUR 1 #define SEEK_CUR 1
@ -164,6 +165,17 @@ void sys_open(Context* context, const char* filename, int flags, mode_t) // FIXM
context->rax = -ENOENT; context->rax = -ENOENT;
return; return;
} }
else
{
bool excl = (flags & OPEN_EXCL) > 0;
if (excl)
{
kfree(kfilename);
context->rax = -EEXIST;
return;
}
}
bool can_read = (flags & OPEN_READ) > 0; bool can_read = (flags & OPEN_READ) > 0;
bool can_write = (flags & OPEN_WRITE) > 0; bool can_write = (flags & OPEN_WRITE) > 0;

2
libs/libc/include/fcntl.h
View File

@ -19,6 +19,8 @@
#define O_CREAT 64 #define O_CREAT 64
/* Open the file for appending. */ /* Open the file for appending. */
#define O_APPEND 128 #define O_APPEND 128
/* Fail to open the file if it already exists. */
#define O_EXCL 256
/* Duplicate a file descriptor. */ /* Duplicate a file descriptor. */
#define F_DUPFD 0 #define F_DUPFD 0