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jehanne: implement open_translator according to the new specification in libposix

This commit is contained in:
Giacomo Tesio 2017-08-22 03:15:55 +02:00
parent 075dc184a0
commit 9daa35f217
1 changed files with 76 additions and 23 deletions
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99
newlib/libc/sys/jehanne/libposix_conf.c
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@ -77,6 +77,16 @@ struct Dir {
#define ORCLOSE 0x10 /* or'ed in, remove on close */
#define OTRUNC 0x0100 /* or'ed in (except for exec), truncate file first */
#define DMDIR 0x80000000 /* mode bit for directories */
#define DMAPPEND 0x40000000 /* mode bit for append only files */
#define DMEXCL 0x20000000 /* mode bit for exclusive use files */
#define DMMOUNT 0x10000000 /* mode bit for mounted channel */
#define DMAUTH 0x08000000 /* mode bit for authentication file */
#define DMTMP 0x04000000 /* mode bit for non-backed-up files */
#define DMREAD 0x4 /* mode bit for read permission */
#define DMWRITE 0x2 /* mode bit for write permission */
#define DMEXEC 0x1 /* mode bit for execute permission */
s
extern void jehanne_sysfatal(const char*, ...);
#include <posix.h>
@ -116,38 +126,81 @@ stat_reader(void *statp, const Dir *dir)
static PosixError
open_translator(int flag, int mode, long *omode, long *cperm)
{
*omode = 0;
*cperm = 0;
switch(flag & O_ACCMODE){
case O_RDONLY:
*omode |= OREAD;
break;
case O_WRONLY:
*omode |= OWRITE;
break;
case O_RDWR:
*omode |= ORDWR;
break;
if(omode != nil){
*omode = 0;
switch(flag & O_ACCMODE){
case O_RDONLY:
*omode |= OREAD;
break;
case O_WRONLY:
*omode |= OWRITE;
break;
case O_RDWR:
*omode |= ORDWR;
break;
}
if(flag & O_EXEC)
*omode = OEXEC;
else if(flag & O_SEARCH){
/* POSIX_open will fail if the file is
* not a directory
*/
*omode |= (OEXEC|DMDIR);
}
if(flag & O_TRUNC)
*omode |= OTRUNC;
if(flag & O_CLOEXEC)
*omode |= OCEXEC;
}
if(flag & O_EXEC)
*omode = OEXEC;
else if(flag & O_SEARCH)
*omode |= OREAD;
/* translate permissions */
if(mode & S_IRUSR)
*cperm |= OREAD << 6;
if(mode & S_IWUSR)
*cperm |= OWRITE << 6;
if(mode & S_IXUSR)
*cperm |= OEXEC << 6;
if(mode & S_IRGRP)
*cperm |= OREAD << 3;
if(mode & S_IWGRP)
*cperm |= OWRITE << 3;
if(mode & S_IXGRP)
*cperm |= OEXEC << 3;
if(mode & S_IROTH)
*cperm |= OREAD;
if(mode & S_IWOTH)
*cperm |= OWRITE;
if(mode & S_IXOTH)
*cperm |= OEXEC;
if(flag & O_CREAT){
if(flag & O_DIRECTORY){
/* let's copy NetBSD's behaviour
* see hhttps://stackoverflow.com/questions/45818628/
*/
return PosixEINVAL;
}
if(flag & O_EXCL)
*cperm = ~mode;
else
*cperm = mode;
*cperm |= DMEXCL;
} else {
if(flag & O_APPEND)
return PosixENOTSUP;
if(flag & O_EXCL)
return PosixENOTSUP;
if(omode != nil){
if(flag & O_DIRECTORY){
/* POSIX_open will fail if the file is
* not a directory
*/
*omode |= DMDIR;
}
}
}
if(flag & O_TRUNC)
*omode |= OTRUNC;
if(flag & O_CLOEXEC)
*omode |= OCEXEC;
return 0;
}