--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/dav/xattrtool.c Sat Oct 19 09:47:31 2019 +0200 @@ -0,0 +1,160 @@ +/* + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. + * + * Copyright 2019 Olaf Wintermann. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * small tool for accessing extended attributes + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> + +#include "libxattr.h" + +int attrtool_list(int argc, char **argv, int values); +int attrtool_get(int argc, char **argv, int raw); +int attrtool_set(int argc, char **argv); + +void print_usage(char *cmd) { + fprintf(stderr, "usage %s:\n", cmd); + fprintf(stderr, " list <file>\n"); + fprintf(stderr, " listvalues <file>\n"); + fprintf(stderr, " get <file> <name>\n"); + fprintf(stderr, " set <file> <name> <value>\n"); + fprintf(stderr, " getraw <file> <name>\n"); +} + +int main(int argc, char **argv) { + if(argc < 3) { + print_usage(argv[0]); + return 1; + } + + if(!strcmp(argv[1], "list") || !strcmp(argv[1], "ls")) { + return attrtool_list(argc, argv, 0); + } else if(!strcmp(argv[1], "listvalues") || !strcmp(argv[1], "lsv")) { + return attrtool_list(argc, argv, 1); + } else if(!strcmp(argv[1], "get")) { + return attrtool_get(argc, argv, 0); + } else if(!strcmp(argv[1], "getraw")) { + return attrtool_get(argc, argv, 1); + } else if(!strcmp(argv[1], "set")) { + return attrtool_set(argc, argv); + } else { + fprintf(stderr, "Unknown command\n"); + print_usage(argv[0]); + } + + return 1; +} + +int attrtool_list(int argc, char **argv, int values) { + ssize_t nelm = 0; + char **list = xattr_list(argv[2], &nelm); + if(nelm < 0) { + perror("xattr_list"); + return 3; + } + + for(int i=0;i<nelm;i++) { + char *attr = list[i]; + if(values) { + ssize_t valuelen = 0; + char *value = xattr_get(argv[2], attr, &valuelen); + if(valuelen < 0) { + printf("%s: #ERROR: %s\n", attr, strerror(errno)); + } else { + printf("%s: %.*s\n", attr, (int)valuelen, value); + } + + if(value) { + free(value); + } + } else { + printf("%s\n", attr); + } + + free(list[i]); + } + if(list) { + free(list); + } + + return 0; +} + +int attrtool_get(int argc, char **argv, int raw) { + if(argc < 4) { + fprintf(stderr, "Too few arguments\n"); + print_usage(argv[1]); + return 1; + } + + char *file = argv[2]; + char *attr = argv[3]; + int ret = 0; + + size_t valuelen = 0; + char *value = xattr_get(file, attr, &valuelen); + if(value) { + if(raw) { + fwrite(value, 1, valuelen, stdout); + } else { + printf("%.*s\n", (int)valuelen, value); + } + free(value); + } else { + perror("xattr_get"); + ret = 3; + } + + return ret; +} + +int attrtool_set(int argc, char **argv) { + if(argc < 4) { + fprintf(stderr, "Too few arguments\n"); + print_usage(argv[1]); + return 1; + } + + size_t len = strlen(argv[4]); + char *file = argv[2]; + char *attr = argv[3]; + char *value = argv[4]; + int ret = 0; + + if(xattr_set(file, attr, value, len)) { + perror("xattr_set"); + ret = 3; + } + + return ret; +} +