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Implement basic chmod() syscall and /bin/chmod helper.

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Only raw octal modes are supported right now.
This patch also changes mode_t from 32-bit to 16-bit to match the on-disk
type used by Ext2FS.

I also ran into EPERM being errno=0 which was confusing, so I inserted an
ESUCCESS in its place.
This commit is contained in:
Andreas Kling 2019-01-29 04:55:08 +01:00
parent ad53f6afd3
commit c30e2c8d44
22 changed files with 156 additions and 4 deletions
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1
LibC/errno_numbers.h
View file

@ -1,6 +1,7 @@
#pragma once
#define __ENUMERATE_ALL_ERRORS \
__ERROR(ESUCCESS, "Success (not an error)") \
__ERROR(EPERM, "Operation not permitted") \
__ERROR(ENOENT, "No such file or directory") \
__ERROR(ESRCH, "No such process") \

6
LibC/stat.cpp
View file

@ -15,5 +15,11 @@ int mkdir(const char* pathname, mode_t mode)
__RETURN_WITH_ERRNO(rc, rc, -1);
}
int chmod(const char* pathname, mode_t mode)
{
int rc = syscall(SC_chmod, pathname, mode);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
}

2
LibC/sys/types.h
View file

@ -24,7 +24,7 @@ typedef uint32_t ino_t;
typedef int32_t off_t;
typedef uint32_t dev_t;
typedef uint32_t mode_t;
typedef uint16_t mode_t;
typedef uint32_t nlink_t;
typedef uint32_t blksize_t;
typedef uint32_t blkcnt_t;

2
LibC/unistd.cpp
View file

@ -97,7 +97,7 @@ int open(const char* path, int options, ...)
{
va_list ap;
va_start(ap, options);
int rc = syscall(SC_open, path, options, va_arg(ap, mode_t));
int rc = syscall(SC_open, path, options, (mode_t)va_arg(ap, unsigned));
va_end(ap);
__RETURN_WITH_ERRNO(rc, rc, -1);
}