function old new delta getfattr_main - 388 +388 print_attr - 204 +204 list_attr - 152 +152 .rodata 95358 95401 +43 applet_names 2766 2775 +9 e843419@0048_000003ed_14 - 8 +8 e843419@0047_000003d1_550 - 8 +8 applet_main 3216 3224 +8 packed_usage 34560 34567 +7 applet_install_loc 201 202 +1 ------------------------------------------------------------------------------ (add/remove: 6/0 grow/shrink: 5/0 up/down: 828/0) Total: 828 bytes text data bss dec hex filename 1127717 16889 1736 1146342 117de6 busybox_old 1157516 16937 1736 1176189 11f27d busybox_unstripped
Signed-off-by: LoveSy <[email protected]> --- Sorry for my duplicate emails. Please ignore my previous email with the same title, as I accidentially sent it without discription. I raise the patch because I notice there's setfattr in busybox but there's no getfattr. This patch adds the missing getfattr counterpart for setfattr. Note that this is a very simple implementation. miscutils/getfattr.c | 120 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 120 insertions(+) create mode 100644 miscutils/getfattr.c diff --git a/miscutils/getfattr.c b/miscutils/getfattr.c new file mode 100644 index 000000000..556241fb5 --- /dev/null +++ b/miscutils/getfattr.c @@ -0,0 +1,120 @@ +/* + * getfattr - get extended attributes of filesystem objects. + * + * Copyright (C) 2023 by LoveSy <[email protected]> + * + * Licensed under GPLv2, see file LICENSE in this source tree. + */ +//config:config GETFATTR +//config: bool "getfattr (12.3 kb)" +//config: default y +//config: help +//config: Get extended attributes on files + +//applet:IF_GETFATTR(APPLET_NOEXEC(getfattr, getfattr, BB_DIR_USR_BIN, BB_SUID_DROP, getfattr)) + +//kbuild:lib-$(CONFIG_GETFATTR) += getfattr.o + +#include <stdio.h> +#include <sys/xattr.h> +#include "libbb.h" + +//usage:#define getfattr_trivial_usage +//usage: "[-h] -n|-d ATTR FILE..." +//usage:#define getfattr_full_usage "\n\n" +//usage: "Get extended attributes" +//usage: "\n" +//usage: "\n -h Do not follow symlinks" +//usage: "\n -d Dump all attributes" +//usage: "\n -n ATTR Get attribute ATTR" +int getfattr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; + +int print_attr(const char *file, const char *name, int follow, char **buf, size_t *buflen) +{ + ssize_t vallen, gotlen; + vallen = (follow ? getxattr: lgetxattr)(file, name, NULL, 0); + if (vallen == -1) { + return -1; + } + vallen += 1; + if (*buflen < vallen) { + *buf = (char *)xrealloc(*buf, vallen); + *buflen = vallen; + } + vallen = (follow ? getxattr : lgetxattr)(file, name, *buf, vallen); + if (vallen == -1) { + return -1; + } + (*buf)[vallen] = '\0'; + printf("%s=\"%s\"\n", name, *buf); + return 0; +} + +ssize_t list_attr(const char *file, int follow, char **list, size_t *listlen) +{ + ssize_t len; + len = (follow ? listxattr : llistxattr)(file, NULL, 0); + if (len == -1) { + return -1; + } + if (*listlen < len) { + *list = (char *)xrealloc(*list, len); + *listlen = len; + } + len = (follow ? listxattr : llistxattr)(file, *list, len); + return len; +} + +int getfattr_main(int argc UNUSED_PARAM, char **argv) +{ + const char *name = NULL; + int status; + int opt; + char *buf = NULL; + size_t buflen = 0; + char *list = NULL; + size_t listlen = 0; + enum { + OPT_h = (1 << 0), + OPT_d = (1 << 1), + }; + + opt = getopt32(argv, "^" + "hdn:" + /* Min one arg, either -x or -n is a must, -d does not allow -n */ + "\0" "-1:dn:n--d:d--n" + , &name + ); + argv += optind; + status = EXIT_SUCCESS; + + do { + int r = 0; + printf("# file: %s\n", *argv); + if (opt & OPT_d) { + ssize_t len = list_attr(*argv, !(opt & OPT_h), &list, &listlen); + ssize_t keylen; + char *key = list; + while (len > 0 && !r) { + r = print_attr(*argv, key, !(opt & OPT_h), &buf, &buflen); + keylen = strlen(key) + 1; + key += keylen; + len -= keylen; + } + } + else { + r = print_attr(*argv, name, !(opt & OPT_h), &buf, &buflen); + } + printf("\n"); + + if (r) { + bb_simple_perror_msg(*argv); + status = EXIT_FAILURE; + } + } while (*++argv); + + free(buf); + free(list); + + return status; +} -- 2.34.1 _______________________________________________ busybox mailing list [email protected] http://lists.busybox.net/mailman/listinfo/busybox
