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-rw-r--r--setfattr/setfattr.c221
1 files changed, 127 insertions, 94 deletions
diff --git a/setfattr/setfattr.c b/setfattr/setfattr.c
index 1cc6150..f38e98f 100644
--- a/setfattr/setfattr.c
+++ b/setfattr/setfattr.c
@@ -1,9 +1,24 @@
/*
- * Original setfattr.c:
- * Copyright (C) 2001 by Andreas Gruenbacher <a.gruenbacher@computer.org>
- * Changes to use revised EA syscall interface:
- * Copyright (C) 2001 by SGI XFS development <linux-xfs@oss.sgi.com>
- */
+ File: setfattr.c
+ (Linux Extended Attributes)
+
+ Copyright (C) 2001-2002 Andreas Gruenbacher <a.gruenbacher@computer.org>
+ Copyright (C) 2001-2002 SGI XFS development <linux-xfs@oss.sgi.com>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
#include <limits.h>
#include <stdio.h>
@@ -18,31 +33,72 @@
#include <libintl.h>
#define _(String) gettext (String)
-#define CMD_LINE_OPTIONS "n:lv:x:B:Vh"
-#define CMD_LINE_SPEC1 "{-n name|-x name} [-v value] [-lVh] file..."
-#define CMD_LINE_SPEC2 "{-B filename} [-lVh] file..."
-
-char *opt_name;
-char *opt_remove;
-char *opt_value;
-int opt_restore;
-int opt_symlink;
+#define CMD_LINE_OPTIONS "n:x:v:hB:HV"
+#define CMD_LINE_SPEC "{-n name|-x name} [-v value] [-h] file..."
+
+struct option long_options[] = {
+ { "name", 1, 0, 'n' },
+ { "remove", 1, 0, 'x' },
+ { "value", 1, 0, 'v' },
+ { "no-dereference", 0, 0, 'h' },
+ { "restore", 1, 0, 'B' },
+ { "version", 0, 0, 'V' },
+ { "help", 0, 0, 'H' },
+ { NULL, 0, 0, 0 }
+};
+
+char *opt_name; /* attribute name to set */
+char *opt_value; /* attribute value */
+int opt_set; /* set an attribute */
+int opt_remove; /* remove an attribute */
+int opt_restore; /* restore has been run */
+int opt_deref = 1; /* dereference symbolic links */
int had_errors;
const char *progname;
-int do_set(const char *name, const char *value, const char *path);
+int do_set(const char *path, const char *name, const char *value);
const char *decode(const char *value, size_t *size);
-int restore(FILE *file, const char *filename);
+int restore(const char *filename);
char *next_line(FILE *file);
int hex_digit(char c);
int base64_digit(char c);
-int restore(FILE *file, const char *filename)
+const char *strerror_ea(int err)
{
- char *path_p = NULL, *l;
+ if (err == ENOATTR)
+ return _("No such attribute");
+ return strerror(err);
+}
+
+int do_setxattr(const char *path, const char *name,
+ const void *value, size_t size)
+{
+ return (opt_deref ? setxattr : lsetxattr)(path, name, value, size, 0);
+}
+
+int do_removexattr(const char *path, const char *name)
+{
+ return (opt_deref ? removexattr : lremovexattr)(path, name);
+}
+
+int restore(const char *filename)
+{
+ FILE *file;
+ char *path = NULL, *l;
int line = 0, backup_line, status = 0;
+ if (strcmp(filename, "-") == 0)
+ file = stdin;
+ else {
+ file = fopen(filename, "r");
+ if (file == NULL) {
+ fprintf(stderr, "%s: %s: %s\n",
+ progname, filename, strerror_ea(errno));
+ return 1;
+ }
+ }
+
for(;;) {
backup_line = line;
while ((l = next_line(file)) != NULL && *l == '\0')
@@ -65,45 +121,48 @@ int restore(FILE *file, const char *filename)
goto cleanup;
} else
l += 8;
- if (path_p)
- free(path_p);
- path_p = (char *)malloc(strlen(l) + 1);
- if (!path_p) {
+ if (path)
+ free(path);
+ path = (char *)malloc(strlen(l) + 1);
+ if (!path) {
status = 1;
goto cleanup;
}
- strcpy(path_p, l);
+ strcpy(path, l);
while ((l = next_line(file)) != NULL && *l != '\0') {
char *name = l, *value = strchr(l, '=');
line++;
if (value)
*value++ = '\0';
- status = do_set(name, value, path_p);
+ status = do_set(path, name, value);
}
if (l != NULL)
line++;
}
cleanup:
- if (path_p)
- free(path_p);
+ if (path)
+ free(path);
+ if (file != stdin)
+ fclose(file);
+ if (status)
+ had_errors++;
return status;
}
void help(void)
{
printf(_("%s %s -- set extended attributes\n"), progname, VERSION);
- printf(_("Usage: %s %s\n"), progname, CMD_LINE_SPEC1);
- printf(_(" %s %s\n"), progname, CMD_LINE_SPEC2);
- printf(_("Options:\n"));
- printf(_("\t-n name\tset value of extended attribute `name'\n"
- "\t-l\tset extended attribute values of a symlink\n"
- "\t-x name\tremove extended attribute `name'\n"
- "\t-v value\n\t\tvalue for extended attribute `name'\n"
- "\t-B filename\n\t\trestore extended attributes (inverse of `getfattr -sdlR')\n"
- "\t-V\tprint version and exit\n"
- "\t-h\tthis help text\n"));
+ printf(_("Usage: %s %s\n"), progname, CMD_LINE_SPEC);
+ printf(_(
+" -n, --name=name set the value of the named extended attribute\n"
+" -x, --remove=name remove the named extended attribute\n"
+" -v, --value=value use value as the attribute value\n"
+" -h, --no-dereference do not dereference symbolic links\n"
+" --restore=file restore extended attributes\n"
+" --version print version and exit\n"
+" --help this help text\n"));
}
char *next_line(FILE *file)
@@ -123,21 +182,22 @@ char *next_line(FILE *file)
int main(int argc, char *argv[])
{
- FILE *file;
- int status;
+ int opt;
progname = basename(argv[0]);
- while ((optopt = getopt(argc, argv, CMD_LINE_OPTIONS)) != -1) {
- switch(optopt) {
+ while ((opt = getopt_long(argc, argv, CMD_LINE_OPTIONS,
+ long_options, NULL)) != -1) {
+ switch(opt) {
case 'n': /* attribute name */
- if (opt_remove)
+ if (opt_name || opt_remove)
goto synopsis;
opt_name = optarg;
+ opt_set = 1;
break;
- case 'l': /* set attribute on symlink itself */
- opt_symlink = 1;
+ case 'h': /* set attribute on symlink itself */
+ opt_deref = 0;
break;
case 'v': /* attribute value */
@@ -147,37 +207,22 @@ int main(int argc, char *argv[])
break;
case 'x': /* remove attribute */
- if (opt_name)
+ if (opt_name || opt_set)
goto synopsis;
- opt_remove = optarg;
+ opt_name = optarg;
+ opt_remove = 1;
break;
case 'B': /* restore */
opt_restore = 1;
- if (strcmp(optarg, "-") == 0)
- file = stdin;
- else {
- file = fopen(optarg, "r");
- if (file == NULL) {
- fprintf(stderr, "%s: %s: %s\n",
- progname, optarg,
- strerror(errno));
- return 1;
- }
- }
- status = restore(file,
- (file == stdin) ? NULL : optarg);
- if (file != stdin)
- fclose(file);
- if (status != 0)
- return 1;
+ restore(optarg);
break;
case 'V':
printf("%s " VERSION "\n", progname);
return 0;
- case 'h':
+ case 'H':
help();
return 0;
@@ -185,15 +230,11 @@ int main(int argc, char *argv[])
goto synopsis;
}
}
- if (((opt_name && opt_remove) || (!opt_name && !opt_remove) ||
- optind >= argc) && !opt_restore)
+ if (!(((opt_remove || opt_set) && optind < argc) || opt_restore))
goto synopsis;
- if (!opt_name) {
- opt_name = opt_remove;
- opt_value = NULL;
- }
+
while (optind < argc) {
- do_set(opt_name, opt_value, argv[optind]);
+ do_set(argv[optind], opt_name, opt_value);
optind++;
}
@@ -201,27 +242,12 @@ int main(int argc, char *argv[])
synopsis:
fprintf(stderr, _("Usage: %s %s\n"
- " %s %s\n"
- "Try `%s -h' for more information.\n"),
- progname, CMD_LINE_SPEC1, progname, CMD_LINE_SPEC2, progname);
+ "Try `%s --help' for more information.\n"),
+ progname, CMD_LINE_SPEC, progname);
return 2;
}
-int do_setxattr(const char *path, const char *name, void *value, size_t size)
-{
- if (opt_symlink)
- return lsetxattr(path, name, value, size, 0);
- return setxattr(path, name, value, size, 0);
-}
-
-int do_removexattr(const char *path, const char *name)
-{
- if (opt_symlink)
- return lremovexattr(path, name);
- return removexattr(path, name);
-}
-
-int do_set(const char *name, const char *value, const char *path)
+int do_set(const char *path, const char *name, const char *value)
{
size_t size = 0;
int error;
@@ -232,10 +258,14 @@ int do_set(const char *name, const char *value, const char *path)
if (!value)
return 1;
}
- error = opt_remove? do_removexattr(path, name):
- do_setxattr(path, name, (void *)value, size);
+ if (opt_set)
+ error = do_setxattr(path, name, value, size);
+ else
+ error = do_removexattr(path, name);
+
if (error < 0) {
- perror(path);
+ fprintf(stderr, "%s: %s: %s\n",
+ progname, path, strerror_ea(errno));
had_errors++;
return 1;
}
@@ -256,7 +286,8 @@ const char *decode(const char *value, size_t *size)
decoded = d = (char *)malloc(*size / 2);
if (!decoded) {
- perror("");
+ fprintf(stderr, "%s: %s\n",
+ progname, strerror_ea(errno));
had_errors++;
return NULL;
}
@@ -289,7 +320,8 @@ const char *decode(const char *value, size_t *size)
decoded = d = (char *)malloc(*size / 4 * 3);
if (!decoded) {
- perror("");
+ fprintf(stderr, "%s: %s\n",
+ progname, strerror_ea(errno));
had_errors++;
return NULL;
}
@@ -360,7 +392,8 @@ const char *decode(const char *value, size_t *size)
decoded = d = (char *)malloc(*size);
if (!decoded) {
- perror("");
+ fprintf(stderr, "%s: %s\n",
+ progname, strerror_ea(errno));
had_errors++;
return NULL;
}
generated by cgit v1.2.3 (git 2.39.1) at 2025-03-02 19:29:41 +0000