From c845cbfc0d3b726794f95723a7a1105d98e8725d Mon Sep 17 00:00:00 2001 From: Bruno Haible Date: Fri, 28 Mar 2003 21:53:34 +0000 Subject: [PATCH] New module copy-file. --- ChangeLog | 5 +++ lib/ChangeLog | 5 +++ lib/copy-file.c | 116 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ lib/copy-file.h | 24 +++++++++++ m4/ChangeLog | 4 ++ m4/copy-file.m4 | 13 ++++++ modules/copy-file | 28 +++++++++++++ 7 files changed, 195 insertions(+) create mode 100644 lib/copy-file.c create mode 100644 lib/copy-file.h create mode 100644 m4/copy-file.m4 create mode 100644 modules/copy-file diff --git a/ChangeLog b/ChangeLog index 45120a157..645f24e87 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +2003-03-28 Bruno Haible + + * modules/copy-file: New file. + * MODULES.html.sh (func_all_modules): Add it. + 2003-02-20 Bruno Haible * MODULES.html.sh (func_all_modules): Add poll. diff --git a/lib/ChangeLog b/lib/ChangeLog index b7c7b9884..57dc361bf 100644 --- a/lib/ChangeLog +++ b/lib/ChangeLog @@ -1,3 +1,8 @@ +2003-03-28 Bruno Haible + + * copy-file.h: New file, from GNU gettext. + * copy-file.c: New file, from GNU gettext. + 2003-03-18 Jim Meyering * quote.c (quote_n): Fix typo in comment. diff --git a/lib/copy-file.c b/lib/copy-file.c new file mode 100644 index 000000000..a03047b58 --- /dev/null +++ b/lib/copy-file.c @@ -0,0 +1,116 @@ +/* Copying of files. + Copyright (C) 2001-2003 Free Software Foundation, Inc. + Written by Bruno Haible , 2001. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +/* Specification. */ +#include "copy-file.h" + +#include +#include +#include + +#ifdef HAVE_UNISTD_H +# include +#endif + +#if HAVE_UTIME || HAVE_UTIMES +# if HAVE_UTIME_H +# include +# else +# include +# endif +#endif + +#include "error.h" +#include "safe-read.h" +#include "full-write.h" +#include "binary-io.h" +#include "exit.h" +#include "gettext.h" + +#define _(str) gettext (str) + +void +copy_file_preserving (const char *src_filename, const char *dest_filename) +{ + int src_fd; + struct stat statbuf; + int mode; + int dest_fd; + char buf[4096]; + const int buf_size = sizeof (buf); + + src_fd = open (src_filename, O_RDONLY | O_BINARY); + if (src_fd < 0 || fstat (src_fd, &statbuf) < 0) + error (EXIT_FAILURE, errno, _("error while opening \"%s\" for reading"), + src_filename); + + mode = statbuf.st_mode & 07777; + + dest_fd = open (dest_filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0600); + if (dest_fd < 0) + error (EXIT_FAILURE, errno, _("cannot open backup file \"%s\" for writing"), + dest_filename); + + /* Copy the file contents. */ + for (;;) + { + size_t n_read = safe_read (src_fd, buf, buf_size); + if (n_read == SAFE_READ_ERROR) + error (EXIT_FAILURE, errno, _("error reading \"%s\""), src_filename); + if (n_read == 0) + break; + + if (full_write (dest_fd, buf, n_read) < n_read) + error (EXIT_FAILURE, errno, _("error writing \"%s\""), dest_filename); + } + + if (close (dest_fd) < 0) + error (EXIT_FAILURE, errno, _("error writing \"%s\""), dest_filename); + if (close (src_fd) < 0) + error (EXIT_FAILURE, errno, _("error after reading \"%s\""), src_filename); + + /* Preserve the access and modification times. */ +#if HAVE_UTIME + { + struct utimbuf ut; + + ut.actime = statbuf.st_atime; + ut.modtime = statbuf.st_mtime; + utime (dest_filename, &ut); + } +#elif HAVE_UTIMES + { + struct timeval ut[2]; + + ut[0].tv_sec = statbuf.st_atime; ut[0].tv_usec = 0; + ut[1].tv_sec = statbuf.st_mtime; ut[1].tv_usec = 0; + utimes (dest_filename, &ut); + } +#endif + + /* Preserve the owner and group. */ + chown (dest_filename, statbuf.st_uid, statbuf.st_gid); + + /* Preserve the access permissions. */ + chmod (dest_filename, mode); +} diff --git a/lib/copy-file.h b/lib/copy-file.h new file mode 100644 index 000000000..3efda34b8 --- /dev/null +++ b/lib/copy-file.h @@ -0,0 +1,24 @@ +/* Copying of files. + Copyright (C) 2001-2003 Free Software Foundation, Inc. + Written by Bruno Haible , 2001. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +/* Copy a regular file: from src_filename to dest_filename. + The destination file is assumed to be a backup file. + Modification times, owner, group and access permissions are preserved as + far as possible. + Exit upon failure. */ +extern void copy_file_preserving (const char *src_filename, const char *dest_filename); diff --git a/m4/ChangeLog b/m4/ChangeLog index b312a27ea..2ad1e1969 100644 --- a/m4/ChangeLog +++ b/m4/ChangeLog @@ -1,3 +1,7 @@ +2003-03-28 Bruno Haible + + * copy-file.m4: New file. + 2003-03-18 Bruno Haible * onceonly.m4: Use m4_defn instead of defn, for better error checking. diff --git a/m4/copy-file.m4 b/m4/copy-file.m4 new file mode 100644 index 000000000..8bc15360d --- /dev/null +++ b/m4/copy-file.m4 @@ -0,0 +1,13 @@ +# copy-file.m4 serial 1 +dnl Copyright (C) 2003 Free Software Foundation, Inc. +dnl This file is free software, distributed under the terms of the GNU +dnl General Public License. As a special exception to the GNU General +dnl Public License, this file may be distributed as part of a program +dnl that contains a configuration script generated by Autoconf, under +dnl the same distribution terms as the rest of that program. + +AC_DEFUN([gl_COPY_FILE], +[ + AC_CHECK_HEADERS_ONCE(unistd.h utime.h) + AC_CHECK_FUNCS(utime utimes) +]) diff --git a/modules/copy-file b/modules/copy-file new file mode 100644 index 000000000..99fc3bfc3 --- /dev/null +++ b/modules/copy-file @@ -0,0 +1,28 @@ +Description: +Copying of files. + +Files: +lib/copy-file.h +lib/copy-file.c +m4/copy-file.m4 + +Depends-on: +error +safe-read +full-write +binary-io +exit +gettext + +configure.ac: +gl_COPY_FILE + +Makefile.am: +lib_SOURCES += copy-file.h copy-file.c + +Include: +"copy-file.h" + +Maintainer: +Bruno Haible + -- 2.11.0