diff options
Diffstat (limited to 'ports/linux/guts/openat.c')
-rw-r--r-- | ports/linux/guts/openat.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/ports/linux/guts/openat.c b/ports/linux/guts/openat.c new file mode 100644 index 0000000..c245796 --- /dev/null +++ b/ports/linux/guts/openat.c @@ -0,0 +1,67 @@ +/* + * Copyright (c) 2008-2010 Wind River Systems; see + * guts/COPYRIGHT for information. + * + * static int + * wrap_openat(int dirfd, const char *path, int flags, ...mode_t mode) { + * int rc = -1; + */ + struct stat64 buf; + int existed = 1; + int save_errno; + +#ifdef PSEUDO_NO_REAL_AT_FUNCTIONS + if (dirfd != AT_FDCWD) { + errno = ENOSYS; + return -1; + } +#endif + /* if a creation has been requested, check whether file exists */ + if (flags & O_CREAT) { + save_errno = errno; +#ifdef PSEUDO_NO_REAL_AT_FUNCTIONS + rc = real___xstat64(_STAT_VER, path, &buf); +#else + rc = real___fxstatat64(_STAT_VER, dirfd, path, &buf, 0); +#endif + existed = (rc != -1); + if (!existed) + pseudo_debug(2, "openat_creat: %s -> 0%o\n", path, mode); + errno = save_errno; + } + + /* because we are not actually root, secretly mask in 0700 to the + * underlying mode + */ +#ifdef PSEUDO_NO_REAL_AT_FUNCTIONS + rc = real_open(path, flags, PSEUDO_FS_MODE(mode)); +#else + rc = real_openat(dirfd, path, flags, PSEUDO_FS_MODE(mode)); +#endif + save_errno = errno; + + if (rc != -1) { + int stat_rc; +#ifdef PSEUDO_NO_REAL_AT_FUNCTIONS + stat_rc = real___xstat64(_STAT_VER, path, &buf); +#else + stat_rc = real___fxstatat64(_STAT_VER, dirfd, path, &buf, 0); +#endif + + if (stat_rc != -1) { + buf.st_mode = PSEUDO_DB_MODE(buf.st_mode, mode); + if (!existed) { + pseudo_client_op(OP_CREAT, 0, -1, dirfd, path, &buf); + } + pseudo_client_op(OP_OPEN, PSEUDO_ACCESS(flags), rc, dirfd, path, &buf); + } else { + pseudo_debug(1, "openat (fd %d, path %d/%s, flags %d) succeeded, but stat failed (%s).\n", + rc, dirfd, path, flags, strerror(errno)); + pseudo_client_op(OP_OPEN, PSEUDO_ACCESS(flags), rc, dirfd, path, 0); + } + errno = save_errno; + } + +/* return rc; + * } + */ |