diff options
author | P. J. McDermott <pjm@nac.net> | 2012-02-09 10:56:43 (EST) |
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committer | P. J. McDermott <pjm@nac.net> | 2012-02-09 10:56:43 (EST) |
commit | f431cd1a48a6a5186633bf5f16a2d21cb4399e8c (patch) | |
tree | 337e36fd9d7884fcf76ba769ab7b0039f52d9d31 /src/libbb/.svn/text-base/all_read.c.svn-base |
Initial commit.
TODO: Copyright information.
Including source code and a patch to add files generated by GNU Autoconf
is not very pretty... Running 'make dist' in the SVN trunk to generate
a source archive might be better.
Diffstat (limited to 'src/libbb/.svn/text-base/all_read.c.svn-base')
-rw-r--r-- | src/libbb/.svn/text-base/all_read.c.svn-base | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/libbb/.svn/text-base/all_read.c.svn-base b/src/libbb/.svn/text-base/all_read.c.svn-base new file mode 100644 index 0000000..6ec731a --- /dev/null +++ b/src/libbb/.svn/text-base/all_read.c.svn-base @@ -0,0 +1,83 @@ +/* vi: set sw=4 ts=4: */ +/* + * Utility routines. + * + * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> + * + * 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 of the License, 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 + */ + +#include <stdio.h> +#include <unistd.h> +#include <errno.h> +#include "libbb.h" + +extern void archive_xread_all(int fd , char *buf, size_t count) +{ + ssize_t size; + + size = full_read(fd, buf, count); + if (size != count) { + perror_msg_and_die("Short read"); + } + return; +} + +/* + * Read all of the supplied buffer from a file. + * This does multiple reads as necessary. + * Returns the amount read, or -1 on an error. + * A short read is returned on an end of file. + */ +ssize_t full_read(int fd, char *buf, int len) +{ + ssize_t cc; + ssize_t total; + + total = 0; + + while (len > 0) { + cc = safe_read(fd, buf, len); + + if (cc < 0) + return cc; /* read() returns -1 on failure. */ + + if (cc == 0) + break; + + buf = ((char *)buf) + cc; + total += cc; + len -= cc; + } + + return total; +} + + +ssize_t safe_read(int fd, void *buf, size_t count) +{ + ssize_t n; + + do { + n = read(fd, buf, count); + } while (n < 0 && errno == EINTR); + + return n; +} + + + +/* END CODE */ + |