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libposix: drafted getdents

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This commit is contained in:
Giacomo Tesio 2017-08-21 01:05:40 +02:00
parent 3916b222b5
commit f7c3a41b11
2 changed files with 50 additions and 1 deletions
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45
sys/include/posix.h
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@ -24,11 +24,51 @@
* POSIX_* functions provide a facade between the Jehanne's libc and * POSIX_* functions provide a facade between the Jehanne's libc and
* the POSIX 1-2008 semantics. * the POSIX 1-2008 semantics.
* *
* libposix_* functions provide the configuration point. * libposix_* functions provide non-standard widely used functions
* (eg. libposix_getdents) and configuration points.
* *
* #include <u.h> * #include <u.h>
* #include <posix.h> * #include <posix.h>
*
* Defining _LIBPOSIX_H before the include allow you to just get dirent
* definition.
*/ */
#ifndef _LIBPOSIX_DIRENT
#define _LIBPOSIX_DIRENT
/* dirent alias of stat(5) message.
* We (ab)use the fact that both 9P and Jehanne are little endian.
* With the new file protocol this might change.
*/
struct __attribute__((__packed__)) dirent
{
unsigned short d_reclen;
unsigned short __pad1__; /* don't use */
unsigned int __pad2__; /* don't use */
unsigned char d_type;
unsigned int d_version;
unsigned long d_ino;
unsigned int d_mode;
unsigned int __pad3__; /* don't use */
unsigned int __pad4__; /* don't use */
unsigned long d_filesize;
unsigned short d_namlen;
char* d_name;
};
#define _DIRENT_HAVE_D_RECLEN
#define _DIRENT_HAVE_D_TYPE
#define _DIRENT_HAVE_D_VERSION
#define _DIRENT_HAVE_D_MODE
#define _DIRENT_HAVE_D_FILESIZE
#define _DIRENT_HAVE_D_NAMLEN
#undef _DIRENT_HAVE_D_OFF
#endif /* _LIBPOSIX_DIRENT */
#ifndef _LIBPOSIX_H
#define _LIBPOSIX_H
typedef unsigned long clock_t; typedef unsigned long clock_t;
#define __POSIX_EXIT_PREFIX "posix error " #define __POSIX_EXIT_PREFIX "posix error "
@ -70,6 +110,7 @@ extern void POSIX_free(void *ptr);
extern unsigned int POSIX_sleep(unsigned int seconds); extern unsigned int POSIX_sleep(unsigned int seconds);
extern int POSIX_pipe(int *errnop, int fildes[2]); extern int POSIX_pipe(int *errnop, int fildes[2]);
extern int libposix_getdents(int *errnop, int fd, struct dirent *buf, int buf_bytes);
/* Library initialization /* Library initialization
*/ */
@ -245,3 +286,5 @@ extern int libposix_emulate_SIGCHLD(void);
* and thus defining them cause an error. * and thus defining them cause an error.
*/ */
int libposix_set_wait_options(int wcontinued, int wnohang, int wuntraced); int libposix_set_wait_options(int wcontinued, int wnohang, int wuntraced);
#endif /* _LIBPOSIX_H */

6
sys/src/lib/posix/files.c
View File

@ -358,3 +358,9 @@ POSIX_stat(int *errnop, const char *file, void *pstat)
*errnop = __libposix_get_errno(e); *errnop = __libposix_get_errno(e);
return -1; return -1;
} }
int
libposix_getdents(int *errnop, int fd, struct dirent *buf, int buf_bytes)
{
return 0;
}