diff options
author | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-12 18:21:06 -0400 |
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committer | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-12 18:21:06 -0400 |
commit | ba0b7413cf3e34eac57de84043f6be2ed5025a84 (patch) | |
tree | 50c91fff0d7182eff31fa610de10b25242069bc0 /src/systemd-delta | |
parent | 519b1e985b2dec67522be81621b2ce2b6350ee70 (diff) |
./move.sh
Diffstat (limited to 'src/systemd-delta')
-rw-r--r-- | src/systemd-delta/Makefile | 33 | ||||
-rw-r--r-- | src/systemd-delta/delta.c | 635 |
2 files changed, 668 insertions, 0 deletions
diff --git a/src/systemd-delta/Makefile b/src/systemd-delta/Makefile new file mode 100644 index 0000000000..62c18cd8d4 --- /dev/null +++ b/src/systemd-delta/Makefile @@ -0,0 +1,33 @@ +# -*- Mode: makefile; indent-tabs-mode: t -*- +# +# This file is part of systemd. +# +# Copyright 2010-2012 Lennart Poettering +# Copyright 2010-2012 Kay Sievers +# Copyright 2013 Zbigniew Jędrzejewski-Szmek +# Copyright 2013 David Strauss +# Copyright 2016 Luke Shumaker +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. +# +# systemd 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 +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public License +# along with systemd; If not, see <http://www.gnu.org/licenses/>. +include $(dir $(lastword $(MAKEFILE_LIST)))/../../config.mk +include $(topsrcdir)/build-aux/Makefile.head.mk + +bin_PROGRAMS += systemd-delta +systemd_delta_SOURCES = \ + src/delta/delta.c + +systemd_delta_LDADD = \ + libshared.la + +include $(topsrcdir)/build-aux/Makefile.tail.mk diff --git a/src/systemd-delta/delta.c b/src/systemd-delta/delta.c new file mode 100644 index 0000000000..f32744def2 --- /dev/null +++ b/src/systemd-delta/delta.c @@ -0,0 +1,635 @@ +/*** + This file is part of systemd. + + Copyright 2012 Lennart Poettering + Copyright 2013 Zbigniew Jędrzejewski-Szmek + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <getopt.h> +#include <string.h> +#include <sys/prctl.h> +#include <unistd.h> + +#include "alloc-util.h" +#include "dirent-util.h" +#include "fd-util.h" +#include "fs-util.h" +#include "hashmap.h" +#include "locale-util.h" +#include "log.h" +#include "pager.h" +#include "parse-util.h" +#include "path-util.h" +#include "process-util.h" +#include "signal-util.h" +#include "stat-util.h" +#include "string-util.h" +#include "strv.h" +#include "terminal-util.h" +#include "util.h" + +static const char prefixes[] = + "/etc\0" + "/run\0" + "/usr/local/lib\0" + "/usr/local/share\0" + "/usr/lib\0" + "/usr/share\0" +#ifdef HAVE_SPLIT_USR + "/lib\0" +#endif + ; + +static const char suffixes[] = + "sysctl.d\0" + "tmpfiles.d\0" + "modules-load.d\0" + "binfmt.d\0" + "systemd/system\0" + "systemd/user\0" + "systemd/system-preset\0" + "systemd/user-preset\0" + "udev/rules.d\0" + "modprobe.d\0"; + +static const char have_dropins[] = + "systemd/system\0" + "systemd/user\0"; + +static bool arg_no_pager = false; +static int arg_diff = -1; + +static enum { + SHOW_MASKED = 1 << 0, + SHOW_EQUIVALENT = 1 << 1, + SHOW_REDIRECTED = 1 << 2, + SHOW_OVERRIDDEN = 1 << 3, + SHOW_UNCHANGED = 1 << 4, + SHOW_EXTENDED = 1 << 5, + + SHOW_DEFAULTS = + (SHOW_MASKED | SHOW_EQUIVALENT | SHOW_REDIRECTED | SHOW_OVERRIDDEN | SHOW_EXTENDED) +} arg_flags = 0; + +static int equivalent(const char *a, const char *b) { + _cleanup_free_ char *x = NULL, *y = NULL; + + x = canonicalize_file_name(a); + if (!x) + return -errno; + + y = canonicalize_file_name(b); + if (!y) + return -errno; + + return path_equal(x, y); +} + +static int notify_override_masked(const char *top, const char *bottom) { + if (!(arg_flags & SHOW_MASKED)) + return 0; + + printf("%s%s%s %s %s %s\n", + ansi_highlight_red(), "[MASKED]", ansi_normal(), + top, special_glyph(ARROW), bottom); + return 1; +} + +static int notify_override_equivalent(const char *top, const char *bottom) { + if (!(arg_flags & SHOW_EQUIVALENT)) + return 0; + + printf("%s%s%s %s %s %s\n", + ansi_highlight_green(), "[EQUIVALENT]", ansi_normal(), + top, special_glyph(ARROW), bottom); + return 1; +} + +static int notify_override_redirected(const char *top, const char *bottom) { + if (!(arg_flags & SHOW_REDIRECTED)) + return 0; + + printf("%s%s%s %s %s %s\n", + ansi_highlight(), "[REDIRECTED]", ansi_normal(), + top, special_glyph(ARROW), bottom); + return 1; +} + +static int notify_override_overridden(const char *top, const char *bottom) { + if (!(arg_flags & SHOW_OVERRIDDEN)) + return 0; + + printf("%s%s%s %s %s %s\n", + ansi_highlight(), "[OVERRIDDEN]", ansi_normal(), + top, special_glyph(ARROW), bottom); + return 1; +} + +static int notify_override_extended(const char *top, const char *bottom) { + if (!(arg_flags & SHOW_EXTENDED)) + return 0; + + printf("%s%s%s %s %s %s\n", + ansi_highlight(), "[EXTENDED]", ansi_normal(), + top, special_glyph(ARROW), bottom); + return 1; +} + +static int notify_override_unchanged(const char *f) { + if (!(arg_flags & SHOW_UNCHANGED)) + return 0; + + printf("[UNCHANGED] %s\n", f); + return 1; +} + +static int found_override(const char *top, const char *bottom) { + _cleanup_free_ char *dest = NULL; + int k; + pid_t pid; + + assert(top); + assert(bottom); + + if (null_or_empty_path(top) > 0) + return notify_override_masked(top, bottom); + + k = readlink_malloc(top, &dest); + if (k >= 0) { + if (equivalent(dest, bottom) > 0) + return notify_override_equivalent(top, bottom); + else + return notify_override_redirected(top, bottom); + } + + k = notify_override_overridden(top, bottom); + if (!arg_diff) + return k; + + putchar('\n'); + + fflush(stdout); + + pid = fork(); + if (pid < 0) + return log_error_errno(errno, "Failed to fork off diff: %m"); + else if (pid == 0) { + + (void) reset_all_signal_handlers(); + (void) reset_signal_mask(); + assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); + + execlp("diff", "diff", "-us", "--", bottom, top, NULL); + log_error_errno(errno, "Failed to execute diff: %m"); + _exit(EXIT_FAILURE); + } + + wait_for_terminate_and_warn("diff", pid, false); + putchar('\n'); + + return k; +} + +static int enumerate_dir_d(Hashmap *top, Hashmap *bottom, Hashmap *drops, const char *toppath, const char *drop) { + _cleanup_free_ char *unit = NULL; + _cleanup_free_ char *path = NULL; + _cleanup_strv_free_ char **list = NULL; + char **file; + char *c; + int r; + + assert(!endswith(drop, "/")); + + path = strjoin(toppath, "/", drop, NULL); + if (!path) + return -ENOMEM; + + log_debug("Looking at %s", path); + + unit = strdup(drop); + if (!unit) + return -ENOMEM; + + c = strrchr(unit, '.'); + if (!c) + return -EINVAL; + *c = 0; + + r = get_files_in_directory(path, &list); + if (r < 0) + return log_error_errno(r, "Failed to enumerate %s: %m", path); + + STRV_FOREACH(file, list) { + Hashmap *h; + int k; + char *p; + char *d; + + if (!endswith(*file, ".conf")) + continue; + + p = strjoin(path, "/", *file, NULL); + if (!p) + return -ENOMEM; + d = p + strlen(toppath) + 1; + + log_debug("Adding at top: %s %s %s", d, special_glyph(ARROW), p); + k = hashmap_put(top, d, p); + if (k >= 0) { + p = strdup(p); + if (!p) + return -ENOMEM; + d = p + strlen(toppath) + 1; + } else if (k != -EEXIST) { + free(p); + return k; + } + + log_debug("Adding at bottom: %s %s %s", d, special_glyph(ARROW), p); + free(hashmap_remove(bottom, d)); + k = hashmap_put(bottom, d, p); + if (k < 0) { + free(p); + return k; + } + + h = hashmap_get(drops, unit); + if (!h) { + h = hashmap_new(&string_hash_ops); + if (!h) + return -ENOMEM; + hashmap_put(drops, unit, h); + unit = strdup(unit); + if (!unit) + return -ENOMEM; + } + + p = strdup(p); + if (!p) + return -ENOMEM; + + log_debug("Adding to drops: %s %s %s %s %s", + unit, special_glyph(ARROW), basename(p), special_glyph(ARROW), p); + k = hashmap_put(h, basename(p), p); + if (k < 0) { + free(p); + if (k != -EEXIST) + return k; + } + } + return 0; +} + +static int enumerate_dir(Hashmap *top, Hashmap *bottom, Hashmap *drops, const char *path, bool dropins) { + _cleanup_closedir_ DIR *d; + + assert(top); + assert(bottom); + assert(drops); + assert(path); + + log_debug("Looking at %s", path); + + d = opendir(path); + if (!d) { + if (errno == ENOENT) + return 0; + + return log_error_errno(errno, "Failed to open %s: %m", path); + } + + for (;;) { + struct dirent *de; + int k; + char *p; + + errno = 0; + de = readdir(d); + if (!de) + return -errno; + + dirent_ensure_type(d, de); + + if (dropins && de->d_type == DT_DIR && endswith(de->d_name, ".d")) + enumerate_dir_d(top, bottom, drops, path, de->d_name); + + if (!dirent_is_file(de)) + continue; + + p = strjoin(path, "/", de->d_name, NULL); + if (!p) + return -ENOMEM; + + log_debug("Adding at top: %s %s %s", basename(p), special_glyph(ARROW), p); + k = hashmap_put(top, basename(p), p); + if (k >= 0) { + p = strdup(p); + if (!p) + return -ENOMEM; + } else if (k != -EEXIST) { + free(p); + return k; + } + + log_debug("Adding at bottom: %s %s %s", basename(p), special_glyph(ARROW), p); + free(hashmap_remove(bottom, basename(p))); + k = hashmap_put(bottom, basename(p), p); + if (k < 0) { + free(p); + return k; + } + } +} + +static int process_suffix(const char *suffix, const char *onlyprefix) { + const char *p; + char *f; + Hashmap *top, *bottom, *drops; + Hashmap *h; + char *key; + int r = 0, k; + Iterator i, j; + int n_found = 0; + bool dropins; + + assert(suffix); + assert(!startswith(suffix, "/")); + assert(!strstr(suffix, "//")); + + dropins = nulstr_contains(have_dropins, suffix); + + top = hashmap_new(&string_hash_ops); + bottom = hashmap_new(&string_hash_ops); + drops = hashmap_new(&string_hash_ops); + if (!top || !bottom || !drops) { + r = -ENOMEM; + goto finish; + } + + NULSTR_FOREACH(p, prefixes) { + _cleanup_free_ char *t = NULL; + + t = strjoin(p, "/", suffix, NULL); + if (!t) { + r = -ENOMEM; + goto finish; + } + + k = enumerate_dir(top, bottom, drops, t, dropins); + if (r == 0) + r = k; + } + + HASHMAP_FOREACH_KEY(f, key, top, i) { + char *o; + + o = hashmap_get(bottom, key); + assert(o); + + if (!onlyprefix || startswith(o, onlyprefix)) { + if (path_equal(o, f)) { + notify_override_unchanged(f); + } else { + k = found_override(f, o); + if (k < 0) + r = k; + else + n_found += k; + } + } + + h = hashmap_get(drops, key); + if (h) + HASHMAP_FOREACH(o, h, j) + if (!onlyprefix || startswith(o, onlyprefix)) + n_found += notify_override_extended(f, o); + } + +finish: + hashmap_free_free(top); + hashmap_free_free(bottom); + + HASHMAP_FOREACH_KEY(h, key, drops, i) { + hashmap_free_free(hashmap_remove(drops, key)); + hashmap_remove(drops, key); + free(key); + } + hashmap_free(drops); + + return r < 0 ? r : n_found; +} + +static int process_suffixes(const char *onlyprefix) { + const char *n; + int n_found = 0, r; + + NULSTR_FOREACH(n, suffixes) { + r = process_suffix(n, onlyprefix); + if (r < 0) + return r; + + n_found += r; + } + + return n_found; +} + +static int process_suffix_chop(const char *arg) { + const char *p; + + assert(arg); + + if (!path_is_absolute(arg)) + return process_suffix(arg, NULL); + + /* Strip prefix from the suffix */ + NULSTR_FOREACH(p, prefixes) { + const char *suffix; + + suffix = startswith(arg, p); + if (suffix) { + suffix += strspn(suffix, "/"); + if (*suffix) + return process_suffix(suffix, NULL); + else + return process_suffixes(arg); + } + } + + log_error("Invalid suffix specification %s.", arg); + return -EINVAL; +} + +static void help(void) { + printf("%s [OPTIONS...] [SUFFIX...]\n\n" + "Find overridden configuration files.\n\n" + " -h --help Show this help\n" + " --version Show package version\n" + " --no-pager Do not pipe output into a pager\n" + " --diff[=1|0] Show a diff when overridden files differ\n" + " -t --type=LIST... Only display a selected set of override types\n" + , program_invocation_short_name); +} + +static int parse_flags(const char *flag_str, int flags) { + const char *word, *state; + size_t l; + + FOREACH_WORD_SEPARATOR(word, l, flag_str, ",", state) { + if (strneq("masked", word, l)) + flags |= SHOW_MASKED; + else if (strneq ("equivalent", word, l)) + flags |= SHOW_EQUIVALENT; + else if (strneq("redirected", word, l)) + flags |= SHOW_REDIRECTED; + else if (strneq("overridden", word, l)) + flags |= SHOW_OVERRIDDEN; + else if (strneq("unchanged", word, l)) + flags |= SHOW_UNCHANGED; + else if (strneq("extended", word, l)) + flags |= SHOW_EXTENDED; + else if (strneq("default", word, l)) + flags |= SHOW_DEFAULTS; + else + return -EINVAL; + } + return flags; +} + +static int parse_argv(int argc, char *argv[]) { + + enum { + ARG_NO_PAGER = 0x100, + ARG_DIFF, + ARG_VERSION + }; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, ARG_VERSION }, + { "no-pager", no_argument, NULL, ARG_NO_PAGER }, + { "diff", optional_argument, NULL, ARG_DIFF }, + { "type", required_argument, NULL, 't' }, + {} + }; + + int c; + + assert(argc >= 1); + assert(argv); + + while ((c = getopt_long(argc, argv, "ht:", options, NULL)) >= 0) + + switch (c) { + + case 'h': + help(); + return 0; + + case ARG_VERSION: + return version(); + + case ARG_NO_PAGER: + arg_no_pager = true; + break; + + case 't': { + int f; + f = parse_flags(optarg, arg_flags); + if (f < 0) { + log_error("Failed to parse flags field."); + return -EINVAL; + } + arg_flags = f; + break; + } + + case ARG_DIFF: + if (!optarg) + arg_diff = 1; + else { + int b; + + b = parse_boolean(optarg); + if (b < 0) { + log_error("Failed to parse diff boolean."); + return -EINVAL; + } + + arg_diff = b; + } + break; + + case '?': + return -EINVAL; + + default: + assert_not_reached("Unhandled option"); + } + + return 1; +} + +int main(int argc, char *argv[]) { + int r, k, n_found = 0; + + log_parse_environment(); + log_open(); + + r = parse_argv(argc, argv); + if (r <= 0) + goto finish; + + if (arg_flags == 0) + arg_flags = SHOW_DEFAULTS; + + if (arg_diff < 0) + arg_diff = !!(arg_flags & SHOW_OVERRIDDEN); + else if (arg_diff) + arg_flags |= SHOW_OVERRIDDEN; + + pager_open(arg_no_pager, false); + + if (optind < argc) { + int i; + + for (i = optind; i < argc; i++) { + path_kill_slashes(argv[i]); + + k = process_suffix_chop(argv[i]); + if (k < 0) + r = k; + else + n_found += k; + } + + } else { + k = process_suffixes(NULL); + if (k < 0) + r = k; + else + n_found += k; + } + + if (r >= 0) + printf("%s%i overridden configuration files found.\n", n_found ? "\n" : "", n_found); + +finish: + pager_close(); + + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} |