This source file includes following definitions.
- ngx_read_file
- ngx_thread_read
- ngx_thread_read_handler
- ngx_write_file
- ngx_open_tempfile
- ngx_write_chain_to_file
- ngx_set_file_time
- ngx_create_file_mapping
- ngx_close_file_mapping
- ngx_open_dir
- ngx_read_dir
- ngx_open_glob
- ngx_read_glob
- ngx_close_glob
- ngx_trylock_fd
- ngx_lock_fd
- ngx_unlock_fd
- ngx_read_ahead
- ngx_directio_on
- ngx_directio_off
- ngx_fs_bsize
- ngx_fs_bsize
- ngx_fs_bsize
#include <ngx_config.h>
#include <ngx_core.h>
#if (NGX_THREADS)
#include <ngx_thread_pool.h>
static void ngx_thread_read_handler(void *data, ngx_log_t *log);
#endif
#if (NGX_HAVE_FILE_AIO)
ngx_uint_t ngx_file_aio = 1;
#endif
ssize_t
ngx_read_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset)
{
ssize_t n;
ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0,
"read: %d, %p, %uz, %O", file->fd, buf, size, offset);
#if (NGX_HAVE_PREAD)
n = pread(file->fd, buf, size, offset);
if (n == -1) {
ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
"pread() \"%s\" failed", file->name.data);
return NGX_ERROR;
}
#else
if (file->sys_offset != offset) {
if (lseek(file->fd, offset, SEEK_SET) == -1) {
ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
"lseek() \"%s\" failed", file->name.data);
return NGX_ERROR;
}
file->sys_offset = offset;
}
n = read(file->fd, buf, size);
if (n == -1) {
ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
"read() \"%s\" failed", file->name.data);
return NGX_ERROR;
}
file->sys_offset += n;
#endif
file->offset += n;
return n;
}
#if (NGX_THREADS)
typedef struct {
ngx_fd_t fd;
u_char *buf;
size_t size;
off_t offset;
size_t read;
ngx_err_t err;
} ngx_thread_read_ctx_t;
ssize_t
ngx_thread_read(ngx_thread_task_t **taskp, ngx_file_t *file, u_char *buf,
size_t size, off_t offset, ngx_pool_t *pool)
{
ngx_thread_task_t *task;
ngx_thread_read_ctx_t *ctx;
ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0,
"thread read: %d, %p, %uz, %O",
file->fd, buf, size, offset);
task = *taskp;
if (task == NULL) {
task = ngx_thread_task_alloc(pool, sizeof(ngx_thread_read_ctx_t));
if (task == NULL) {
return NGX_ERROR;
}
task->handler = ngx_thread_read_handler;
*taskp = task;
}
ctx = task->ctx;
if (task->event.complete) {
task->event.complete = 0;
if (ctx->err) {
ngx_log_error(NGX_LOG_CRIT, file->log, ctx->err,
"pread() \"%s\" failed", file->name.data);
return NGX_ERROR;
}
return ctx->read;
}
ctx->fd = file->fd;
ctx->buf = buf;
ctx->size = size;
ctx->offset = offset;
if (file->thread_handler(task, file) != NGX_OK) {
return NGX_ERROR;
}
return NGX_AGAIN;
}
#if (NGX_HAVE_PREAD)
static void
ngx_thread_read_handler(void *data, ngx_log_t *log)
{
ngx_thread_read_ctx_t *ctx = data;
ssize_t n;
ngx_log_debug0(NGX_LOG_DEBUG_CORE, log, 0, "thread read handler");
n = pread(ctx->fd, ctx->buf, ctx->size, ctx->offset);
if (n == -1) {
ctx->err = ngx_errno;
} else {
ctx->read = n;
ctx->err = 0;
}
#if 0
ngx_time_update();
#endif
ngx_log_debug4(NGX_LOG_DEBUG_CORE, log, 0,
"pread: %z (err: %i) of %uz @%O",
n, ctx->err, ctx->size, ctx->offset);
}
#else
#error pread() is required!
#endif
#endif
ssize_t
ngx_write_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset)
{
ssize_t n, written;
ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0,
"write: %d, %p, %uz, %O", file->fd, buf, size, offset);
written = 0;
#if (NGX_HAVE_PWRITE)
for ( ;; ) {
n = pwrite(file->fd, buf + written, size, offset);
if (n == -1) {
ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
"pwrite() \"%s\" failed", file->name.data);
return NGX_ERROR;
}
file->offset += n;
written += n;
if ((size_t) n == size) {
return written;
}
offset += n;
size -= n;
}
#else
if (file->sys_offset != offset) {
if (lseek(file->fd, offset, SEEK_SET) == -1) {
ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
"lseek() \"%s\" failed", file->name.data);
return NGX_ERROR;
}
file->sys_offset = offset;
}
for ( ;; ) {
n = write(file->fd, buf + written, size);
if (n == -1) {
ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
"write() \"%s\" failed", file->name.data);
return NGX_ERROR;
}
file->offset += n;
written += n;
if ((size_t) n == size) {
return written;
}
size -= n;
}
#endif
}
ngx_fd_t
ngx_open_tempfile(u_char *name, ngx_uint_t persistent, ngx_uint_t access)
{
ngx_fd_t fd;
fd = open((const char *) name, O_CREAT|O_EXCL|O_RDWR,
access ? access : 0600);
if (fd != -1 && !persistent) {
(void) unlink((const char *) name);
}
return fd;
}
#define NGX_IOVS 8
ssize_t
ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *cl, off_t offset,
ngx_pool_t *pool)
{
u_char *prev;
size_t size;
ssize_t total, n;
ngx_array_t vec;
struct iovec *iov, iovs[NGX_IOVS];
if (cl->next == NULL) {
return ngx_write_file(file, cl->buf->pos,
(size_t) (cl->buf->last - cl->buf->pos),
offset);
}
total = 0;
vec.elts = iovs;
vec.size = sizeof(struct iovec);
vec.nalloc = NGX_IOVS;
vec.pool = pool;
do {
prev = NULL;
iov = NULL;
size = 0;
vec.nelts = 0;
while (cl && vec.nelts < IOV_MAX) {
if (prev == cl->buf->pos) {
iov->iov_len += cl->buf->last - cl->buf->pos;
} else {
iov = ngx_array_push(&vec);
if (iov == NULL) {
return NGX_ERROR;
}
iov->iov_base = (void *) cl->buf->pos;
iov->iov_len = cl->buf->last - cl->buf->pos;
}
size += cl->buf->last - cl->buf->pos;
prev = cl->buf->last;
cl = cl->next;
}
if (vec.nelts == 1) {
iov = vec.elts;
n = ngx_write_file(file, (u_char *) iov[0].iov_base,
iov[0].iov_len, offset);
if (n == NGX_ERROR) {
return n;
}
return total + n;
}
if (file->sys_offset != offset) {
if (lseek(file->fd, offset, SEEK_SET) == -1) {
ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
"lseek() \"%s\" failed", file->name.data);
return NGX_ERROR;
}
file->sys_offset = offset;
}
n = writev(file->fd, vec.elts, vec.nelts);
if (n == -1) {
ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno,
"writev() \"%s\" failed", file->name.data);
return NGX_ERROR;
}
if ((size_t) n != size) {
ngx_log_error(NGX_LOG_CRIT, file->log, 0,
"writev() \"%s\" has written only %z of %uz",
file->name.data, n, size);
return NGX_ERROR;
}
ngx_log_debug2(NGX_LOG_DEBUG_CORE, file->log, 0,
"writev: %d, %z", file->fd, n);
file->sys_offset += n;
file->offset += n;
offset += n;
total += n;
} while (cl);
return total;
}
ngx_int_t
ngx_set_file_time(u_char *name, ngx_fd_t fd, time_t s)
{
struct timeval tv[2];
tv[0].tv_sec = ngx_time();
tv[0].tv_usec = 0;
tv[1].tv_sec = s;
tv[1].tv_usec = 0;
if (utimes((char *) name, tv) != -1) {
return NGX_OK;
}
return NGX_ERROR;
}
ngx_int_t
ngx_create_file_mapping(ngx_file_mapping_t *fm)
{
fm->fd = ngx_open_file(fm->name, NGX_FILE_RDWR, NGX_FILE_TRUNCATE,
NGX_FILE_DEFAULT_ACCESS);
if (fm->fd == NGX_INVALID_FILE) {
ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno,
ngx_open_file_n " \"%s\" failed", fm->name);
return NGX_ERROR;
}
if (ftruncate(fm->fd, fm->size) == -1) {
ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno,
"ftruncate() \"%s\" failed", fm->name);
goto failed;
}
fm->addr = mmap(NULL, fm->size, PROT_READ|PROT_WRITE, MAP_SHARED,
fm->fd, 0);
if (fm->addr != MAP_FAILED) {
return NGX_OK;
}
ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno,
"mmap(%uz) \"%s\" failed", fm->size, fm->name);
failed:
if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno,
ngx_close_file_n " \"%s\" failed", fm->name);
}
return NGX_ERROR;
}
void
ngx_close_file_mapping(ngx_file_mapping_t *fm)
{
if (munmap(fm->addr, fm->size) == -1) {
ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno,
"munmap(%uz) \"%s\" failed", fm->size, fm->name);
}
if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) {
ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno,
ngx_close_file_n " \"%s\" failed", fm->name);
}
}
ngx_int_t
ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir)
{
dir->dir = opendir((const char *) name->data);
if (dir->dir == NULL) {
return NGX_ERROR;
}
dir->valid_info = 0;
return NGX_OK;
}
ngx_int_t
ngx_read_dir(ngx_dir_t *dir)
{
dir->de = readdir(dir->dir);
if (dir->de) {
#if (NGX_HAVE_D_TYPE)
dir->type = dir->de->d_type;
#else
dir->type = 0;
#endif
return NGX_OK;
}
return NGX_ERROR;
}
ngx_int_t
ngx_open_glob(ngx_glob_t *gl)
{
int n;
n = glob((char *) gl->pattern, 0, NULL, &gl->pglob);
if (n == 0) {
return NGX_OK;
}
#ifdef GLOB_NOMATCH
if (n == GLOB_NOMATCH && gl->test) {
return NGX_OK;
}
#endif
return NGX_ERROR;
}
ngx_int_t
ngx_read_glob(ngx_glob_t *gl, ngx_str_t *name)
{
size_t count;
#ifdef GLOB_NOMATCH
count = (size_t) gl->pglob.gl_pathc;
#else
count = (size_t) gl->pglob.gl_matchc;
#endif
if (gl->n < count) {
name->len = (size_t) ngx_strlen(gl->pglob.gl_pathv[gl->n]);
name->data = (u_char *) gl->pglob.gl_pathv[gl->n];
gl->n++;
return NGX_OK;
}
return NGX_DONE;
}
void
ngx_close_glob(ngx_glob_t *gl)
{
globfree(&gl->pglob);
}
ngx_err_t
ngx_trylock_fd(ngx_fd_t fd)
{
struct flock fl;
ngx_memzero(&fl, sizeof(struct flock));
fl.l_type = F_WRLCK;
fl.l_whence = SEEK_SET;
if (fcntl(fd, F_SETLK, &fl) == -1) {
return ngx_errno;
}
return 0;
}
ngx_err_t
ngx_lock_fd(ngx_fd_t fd)
{
struct flock fl;
ngx_memzero(&fl, sizeof(struct flock));
fl.l_type = F_WRLCK;
fl.l_whence = SEEK_SET;
if (fcntl(fd, F_SETLKW, &fl) == -1) {
return ngx_errno;
}
return 0;
}
ngx_err_t
ngx_unlock_fd(ngx_fd_t fd)
{
struct flock fl;
ngx_memzero(&fl, sizeof(struct flock));
fl.l_type = F_UNLCK;
fl.l_whence = SEEK_SET;
if (fcntl(fd, F_SETLK, &fl) == -1) {
return ngx_errno;
}
return 0;
}
#if (NGX_HAVE_POSIX_FADVISE) && !(NGX_HAVE_F_READAHEAD)
ngx_int_t
ngx_read_ahead(ngx_fd_t fd, size_t n)
{
int err;
err = posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL);
if (err == 0) {
return 0;
}
ngx_set_errno(err);
return NGX_FILE_ERROR;
}
#endif
#if (NGX_HAVE_O_DIRECT)
ngx_int_t
ngx_directio_on(ngx_fd_t fd)
{
int flags;
flags = fcntl(fd, F_GETFL);
if (flags == -1) {
return NGX_FILE_ERROR;
}
return fcntl(fd, F_SETFL, flags | O_DIRECT);
}
ngx_int_t
ngx_directio_off(ngx_fd_t fd)
{
int flags;
flags = fcntl(fd, F_GETFL);
if (flags == -1) {
return NGX_FILE_ERROR;
}
return fcntl(fd, F_SETFL, flags & ~O_DIRECT);
}
#endif
#if (NGX_HAVE_STATFS)
size_t
ngx_fs_bsize(u_char *name)
{
struct statfs fs;
if (statfs((char *) name, &fs) == -1) {
return 512;
}
if ((fs.f_bsize % 512) != 0) {
return 512;
}
return (size_t) fs.f_bsize;
}
#elif (NGX_HAVE_STATVFS)
size_t
ngx_fs_bsize(u_char *name)
{
struct statvfs fs;
if (statvfs((char *) name, &fs) == -1) {
return 512;
}
if ((fs.f_frsize % 512) != 0) {
return 512;
}
return (size_t) fs.f_frsize;
}
#else
size_t
ngx_fs_bsize(u_char *name)
{
return 512;
}
#endif