b6d285faba
. add non-internal aliases for stat, lstat, fstat Change-Id: I87e025b2bf073ff56a5742fc1dcf5badb2b7b321
141 lines
3.2 KiB
C
141 lines
3.2 KiB
C
#include <sys/cdefs.h>
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#include "namespace.h"
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#include <lib.h>
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#include <sys/stat.h>
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#include <string.h>
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/* XXX until that st_Xtime macroses used, we have to undefine them,
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* because of minix_prev_stat
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*/
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#undef st_atime
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#undef st_ctime
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#undef st_mtime
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static void prev_stat2new_stat(struct stat *new, struct minix_prev_stat *prev)
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{
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/* Copy field by field because of st_gid type mismath and
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* difference in order after atime.
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*/
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new->st_dev = prev->st_dev;
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new->st_ino = prev->st_ino;
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new->st_mode = prev->st_mode;
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new->st_nlink = prev->st_nlink;
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new->st_uid = prev->st_uid;
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new->st_gid = prev->st_gid;
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new->st_rdev = prev->st_rdev;
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new->st_size = prev->st_size;
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new->st_atimespec.tv_sec = prev->st_atime;
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new->st_mtimespec.tv_sec = prev->st_mtime;
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new->st_ctimespec.tv_sec = prev->st_ctime;
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}
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int _stat(const char *name, struct stat *buffer);
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int _lstat(const char *name, struct stat *buffer);
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int _fstat(int fd, struct stat *buffer);
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#ifdef __weak_alias
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__weak_alias(_stat, __stat50);
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__weak_alias(_lstat, __lstat50);
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__weak_alias(_fstat, __fstat50);
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__weak_alias(stat, __stat50);
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__weak_alias(lstat, __lstat50);
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__weak_alias(fstat, __fstat50);
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#endif
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int stat(const char *name, struct stat *buffer)
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{
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message m;
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int r;
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struct minix_prev_stat old_sb;
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m.m1_i1 = strlen(name) + 1;
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m.m1_p1 = (char *) __UNCONST(name);
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m.m1_p2 = (char *) buffer;
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if((r = _syscall(VFS_PROC_NR, STAT, &m)) >= 0 || errno != ENOSYS)
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return r;
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errno = 0;
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/* ENOSYS: new binary and old VFS, fallback to PREV_STAT.
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* User has struct stat (buffer), VFS still fills minix_prev_stat.
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*/
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m.m1_i1 = strlen(name) + 1;
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m.m1_p1 = (char *) __UNCONST(name);
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m.m1_p2 = (char *) &old_sb;
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if((r = _syscall(VFS_PROC_NR, PREV_STAT, &m)) < 0)
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return r;
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memset(buffer, 0, sizeof(struct stat));
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prev_stat2new_stat(buffer, &old_sb);
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return r;
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}
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int _fstat(int fd, struct stat *buffer) { return fstat(fd, buffer); }
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int fstat(int fd, struct stat *buffer)
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{
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message m;
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int r;
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struct minix_prev_stat old_sb;
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m.m1_i1 = fd;
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m.m1_p1 = (char *) buffer;
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if((r = _syscall(VFS_PROC_NR, FSTAT, &m)) >= 0 || errno != ENOSYS)
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return r;
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errno = 0;
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/* ENOSYS: new binary and old VFS, fallback to PREV_STAT.
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* User has struct stat (buffer), VFS still fills minix_prev_stat.
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*/
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m.m1_i1 = fd;
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m.m1_p1 = (char *) &old_sb;
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if((r = _syscall(VFS_PROC_NR, PREV_FSTAT, &m)) < 0)
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return r;
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memset(buffer, 0, sizeof(struct stat));
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prev_stat2new_stat(buffer, &old_sb);
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return r;
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}
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int _lstat(const char *name, struct stat *buffer) { return lstat(name, buffer); }
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int lstat(const char *name, struct stat *buffer)
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{
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message m;
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int r;
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struct minix_prev_stat old_sb;
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m.m1_i1 = strlen(name) + 1;
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m.m1_p1 = (char *) __UNCONST(name);
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m.m1_p2 = (char *) buffer;
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if((r = _syscall(VFS_PROC_NR, LSTAT, &m)) >= 0 || errno != ENOSYS)
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return r;
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errno = 0;
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/* ENOSYS: new binary and old VFS, fallback to PREV_STAT.
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* User has struct stat (buffer), VFS still fills minix_prev_stat.
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*/
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m.m1_i1 = strlen(name) + 1;
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m.m1_p1 = (char *) __UNCONST(name);
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m.m1_p2 = (char *) &old_sb;
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if((r = _syscall(VFS_PROC_NR, PREV_LSTAT, &m)) < 0)
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return r;
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memset(buffer, 0, sizeof(struct stat));
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prev_stat2new_stat(buffer, &old_sb);
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return r;
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}
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