--- /dev/null
+**** Licensing information ****
+
+Author: Alain D D Williams <addw@phcomp.co.uk> of
+Parliament Hill Computers http://www.phcomp.co.uk.
+
+Copyright (C) the Author 2011.
+
+This software is released under the following license.
+If you do not like the choices below you may attempt to negotiate another license with the author.
+
+**** GNU General Public License, Version 2, June 1991:
+
+ GNU GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+ 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Software: Copyright (c) 2006 Alain D D Williams <addw@phcomp.co.uk> under this GPL.
+
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+
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+ NO WARRANTY
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+ 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
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+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
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+
+
+SCCS: @(#)License 1.1 11/14/11 12:28:23
+
--- /dev/null
+/* /\
+ * / \ (C) Copyright 2009 Parliament Hill Computers Ltd.
+ * \ / All rights reserved.
+ * \/
+ * . Author: Alain Williams, <addw@phcomp.co.uk> 2009
+ * .
+ * . SCCS: @(#)fsync.c 1.3 11/14/11 22:46:01
+ * .
+ *
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <string.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+
+extern int optind;
+extern char* optarg;
+
+char* progname; /* What this program is called - name of binary */
+int exit_c; /* Exit status to return to O/S */
+int datasync; /* Use fdatasync */
+int quiet; /* Do not report errors */
+int verbose; /* Chatty mode */
+char* flushname; /* Name of how we flush */
+int (*flushfn)(int); /* Pointer to system call to use */
+
+/* Usage message.
+ */
+char* usagem[] = {
+ "Ensure that named files are flushed to disk",
+ "Usage: %s [options] file ...",
+ "-d do not flush metadata (fdatasync())",
+ "-q do not report errors (eg file open fails), still set exit code",
+ "-v verbose",
+ "-x eXplain",
+ "Version: 1.3 11/14/11",
+ (char*)NULL /* Must end the list */
+};
+
+/* Functions defined in this module, in alphabetic order */
+void read_opts(int argc, char* argv[]);
+void usage(int exitc);
+void process(const char* file);
+
+int main(int argc, char* argv[])
+{
+ read_opts(argc, argv);
+
+ flushname = datasync ? "fdatasync" : "fsync";
+ flushfn = datasync ? fdatasync : fsync;
+
+ argv += optind;
+ while(*argv)
+ process(*argv++);
+
+ return(exit_c);
+}
+
+/* Interpret '-' arguments -options.
+ * If there is an error in the arguments, print the options list and exit.
+ */
+void read_opts(int argc, char* argv[])
+{
+ register int c;
+ register int error;
+
+ error = 0;
+ progname = argv[0];
+
+ while((c = getopt(argc, argv, "dqvx")) != EOF)
+ switch(c) {
+ case 'd': /* Use fdatasync() */
+ datasync = 1;
+ break;
+ case 'q': /* Quiet */
+ quiet = 1;
+ break;
+ case 'v': /* Verbose */
+ verbose = 1;
+ break;
+ case 'x': /* eXplain */
+ usage(0);
+ /*NOTREACHED*/
+ case '?':
+ error = 1;
+ break;
+ }
+
+ if(error)
+ usage(2);
+}
+
+/* Output a usage message and end with exit status exitc.
+ */
+void usage(int exitc)
+{
+ register char** mes;
+
+ for(mes = usagem; *mes != (char*)NULL; mes++) {
+ (void) fprintf(stderr, *mes, progname);
+ fputc('\n', stderr);
+ }
+
+ exit(exitc);
+ /*NOTREACHED*/
+}
+
+/* Flush the named file to disk -- use the fsync or fdatasync system call
+ */
+void process(const char* file)
+{
+ int fd;
+
+ if(verbose)
+ fprintf(stderr, "%s: about to %s '%s'\n", progname,
+ flushname, file);
+
+ /* Need to open read/write for fsync to work.
+ * But we can't open directories to write to, so try to open one read only.
+ * Linux (2.6.18 anyway) doesn't seem to check that the fd to fsync is for
+ * writing - but that is what the manual says it must be.
+ */
+ if((fd = open(file, O_WRONLY)) == -1 &&
+ (errno == EISDIR && (fd = open(file, O_RDONLY)) == -1)) {
+ if( ! quiet)
+ fprintf(stderr, "%s: Cannot open '%s' as: %s\n", progname, file,
+ strerror(errno));
+ exit_c = 1;
+ return;
+ }
+
+ if((*flushfn)(fd) == -1) {
+ if( ! quiet)
+ fprintf(stderr, "%s: Cannot %s '%s' as: %s\n", progname, flushname, file,
+ strerror(errno));
+ exit_c = 1;
+ }
+
+ if(close(fd)) {
+ if( ! quiet)
+ fprintf(stderr, "%s: Error on close of '%s' as: %s\n", progname, file,
+ strerror(errno));
+ exit_c = 1;
+ }
+}
+
+/* end */
projects / platform / upstream / fsync.git / commitdiff