Mercurial > hg > nginx-quic
view src/os/unix/ngx_files.c @ 330:377a955421dc
nginx-0.0.3-2004-04-29-20:34:26 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Thu, 29 Apr 2004 16:34:26 +0000 |
parents | 00c5660d2707 |
children | 6bdf858bff8c |
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#include <ngx_config.h> #include <ngx_core.h> 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, %X, %d, " OFF_T_FMT, file->fd, buf, size, offset); #if (HAVE_PREAD) n = pread(file->fd, buf, size, offset); if (n == -1) { ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "pread() failed, file \"%s\"", 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() failed"); 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() failed"); return NGX_ERROR; } file->sys_offset += n; #endif file->offset += n; return n; } ssize_t ngx_write_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) { ssize_t n; #if (HAVE_PWRITE) n = pwrite(file->fd, buf, size, offset); if (n == -1) { ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "pwrite() failed"); return NGX_ERROR; } if ((size_t) n != size) { ngx_log_error(NGX_LOG_CRIT, file->log, 0, "pwrite() has written only %d of %d", n, size); 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() failed"); return NGX_ERROR; } file->sys_offset = offset; } n = write(file->fd, buf, size); if (n == -1) { ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "write() failed"); return NGX_ERROR; } if ((size_t) n != size) { ngx_log_error(NGX_LOG_CRIT, file->log, 0, "write() has written only %d of %d", n, size); return NGX_ERROR; } file->sys_offset += n; #endif file->offset += n; return n; } int ngx_open_tempfile(u_char *name, ngx_uint_t persistent) { ngx_fd_t fd; fd = open((const char *) name, O_CREAT|O_EXCL|O_RDWR, 0600); if (fd != -1 && !persistent) { unlink((const char *) name); } return fd; } 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 n; struct iovec *iov; ngx_err_t err; ngx_array_t io; /* use pwrite() if there's the only hunk in a chain */ if (cl->next == NULL) { return ngx_write_file(file, cl->hunk->pos, (size_t) (cl->hunk->last - cl->hunk->pos), offset); } prev = NULL; iov = NULL; size = 0; ngx_init_array(io, pool, 10, sizeof(struct iovec), NGX_ERROR); /* create the iovec and coalesce the neighbouring hunks */ while (cl) { if (prev == cl->hunk->pos) { iov->iov_len += cl->hunk->last - cl->hunk->pos; } else { ngx_test_null(iov, ngx_push_array(&io), NGX_ERROR); iov->iov_base = (void *) cl->hunk->pos; iov->iov_len = cl->hunk->last - cl->hunk->pos; } size += cl->hunk->last - cl->hunk->pos; prev = cl->hunk->last; cl = cl->next; } /* use pwrite() if there's the only iovec buffer */ if (io.nelts == 1) { iov = io.elts; return ngx_write_file(file, (u_char *) iov[0].iov_base, iov[0].iov_len, offset); } if (file->sys_offset != offset) { if (lseek(file->fd, offset, SEEK_SET) == -1) { ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "lseek() failed"); return NGX_ERROR; } file->sys_offset = offset; } n = writev(file->fd, io.elts, io.nelts); if (n == -1) { ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "writev() failed"); return NGX_ERROR; } if ((size_t) n != size) { ngx_log_error(NGX_LOG_CRIT, file->log, 0, "writev() has written only %d of %d", n, size); return NGX_ERROR; } file->sys_offset += n; file->offset += n; return n; } int 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->info_valid = 0; return NGX_OK; } #if 0 ssize_t ngx_read_file(ngx_file_t *file, char *buf, size_t size, off_t offset) { if (!file->read->ready) { ngx_memzero(&file->iocb, sizeof(iocb)); file->iocb.aio_fildes = file->fd; file->iocb.aio_buf = buf; file->iocb.aio_nbytes = size; file->iocb.aio_offset = offset; #if (USE_AIO_KQUEUE) file->iocb.aio_sigevent.sigev_notify = SIGEV_KEVENT; file->iocb.aio_sigevent.sigev_notify_kqueue = tid->kq; file->iocb.aio_sigevent.sigev_value = (union sigval) file; #endif #if (USE_AIO_SIGNAL) file->iocb.aio_sigevent.sigev_notify = SIGEV_SIGNAL; file->iocb.aio_sigevent.sigev_signo = NGX_SIGAIO; #ifndef __FreeBSD__ file->iocb.aio_sigevent.sigev_value.sival_ptr = file; #endif #endif if (aio_read(&file->iocb) == -1) { ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno, "aio_read() failed"); return NGX_ERROR; n = aio_error(&file->iocb); if (n == EINPROGRESS) return NGX_AGAIN; if (n == -1) { ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno, "aio_read() failed"); return NGX_ERROR; } } ngx_assert(file->iocb.aio_buf == buf), return NGX_ERROR, "ngx_aio_read_file: another buffer is passed"); n = aio_return(&file->iocb); if (n == -1) { ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno, "aio_read() failed"); return NGX_ERROR; } return n; } #endif