Mercurial > hg > nginx-quic
diff src/os/unix/ngx_files.c @ 182:3c49eaf3f522
nginx-0.0.1-2003-11-13-09:14:05 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Thu, 13 Nov 2003 06:14:05 +0000 |
parents | c42be4185301 |
children | c1f3a3c7c5db |
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line diff
--- a/src/os/unix/ngx_files.c +++ b/src/os/unix/ngx_files.c @@ -14,6 +14,8 @@ ssize_t ngx_read_file(ngx_file_t *file, ngx_log_debug(file->log, "read: %d, %x, %d, %qd" _ file->fd _ buf _ size _ offset); +#if (HAVE_PREAD) + n = pread(file->fd, buf, size, offset); if (n == -1) { @@ -21,6 +23,24 @@ ssize_t ngx_read_file(ngx_file_t *file, return NGX_ERROR; } +#else + + if (file->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; + } + } + + n = read(file->fd, buf, size); + + if (n == -1) { + ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "read() failed"); + return NGX_ERROR; + } + +#endif + file->offset += n; return n; @@ -31,6 +51,8 @@ ssize_t ngx_write_file(ngx_file_t *file, { ssize_t n; +#if (HAVE_PWRITE) + n = pwrite(file->fd, buf, size, offset); if (n == -1) { @@ -44,6 +66,30 @@ ssize_t ngx_write_file(ngx_file_t *file, return NGX_ERROR; } +#else + + if (file->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; + } + } + + 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; + } + +#endif + file->offset += n; return n;