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https://github.com/freebsd/freebsd-src
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o Add a 'showattr' function the extattrctl, allowing a backing file to
be inspected to show the maximum attribute size and file.
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parent
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=88740
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@ -50,6 +50,9 @@
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.Ar attrsize
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.Ar attrfile
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.Nm
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.Cm showattr
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.Ar attrfile
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.Nm
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.Cm enable
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.Ar path
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.Ar attrnamespace
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@ -109,6 +112,9 @@ from denying attribute service.
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.Pp
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This file should not exist before running
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.Cm initattr .
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.It Cm showattr Ar attrfile
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Show the attribute header values in the attribute file named by
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.Ar attrfile .
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.It Cm enable Ar path attrnamespace attrname attrfile
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Enable an attribute named
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.Ar attrname
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@ -49,6 +49,7 @@
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#include <unistd.h>
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int initattr(int argc, char *argv[]);
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int showattr(int argc, char *argv[]);
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long num_inodes_by_path(char *path);
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void usage(void);
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@ -61,6 +62,7 @@ usage()
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" extattrctl start [path]\n"
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" extattrctl stop [path]\n"
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" extattrctl initattr [-f] [-p path] [attrsize] [attrfile]\n"
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" extattrctl showattr [attrfile]\n"
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" extattrctl enable [path] [attrnamespace] [attrname] [attrfile]\n"
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" extattrctl disable [path] [attrnamespace] [attrname]\n");
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exit(-1);
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@ -160,6 +162,42 @@ initattr(int argc, char *argv[])
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return (0);
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}
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int
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showattr(int argc, char *argv[])
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{
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struct ufs_extattr_fileheader uef;
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int i, fd;
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if (argc != 1)
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usage();
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fd = open(argv[0], O_RDONLY);
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if (fd == -1) {
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perror(argv[0]);
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return (-1);
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}
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i = read(fd, &uef, sizeof(uef));
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if (i == -1) {
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perror(argv[0]);
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return (-1);
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}
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if (i != sizeof(uef)) {
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fprintf(stderr, "%s: invalid file header\n", argv[0]);
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return (-1);
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}
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if (uef.uef_magic != UFS_EXTATTR_MAGIC) {
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fprintf(stderr, "%s: bad magic\n", argv[0]);
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return (-1);
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}
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printf("%s: version %d, size %d\n", argv[0], uef.uef_version,
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uef.uef_size);
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return (0);
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}
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int
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main(int argc, char *argv[])
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{
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@ -220,6 +258,12 @@ main(int argc, char *argv[])
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error = initattr(argc, argv);
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if (error)
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return (-1);
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} else if (!strcmp(argv[1], "showattr")) {
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argc -= 2;
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argv += 2;
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error = showattr(argc, argv);
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if (error)
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return (-1);
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} else
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usage();
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