diff options
Diffstat (limited to 'src/delta')
| l--------- | src/delta/Makefile | 1 | ||||
| -rw-r--r-- | src/delta/delta.c | 490 |
2 files changed, 491 insertions, 0 deletions
diff --git a/src/delta/Makefile b/src/delta/Makefile new file mode 120000 index 0000000000..d0b0e8e008 --- /dev/null +++ b/src/delta/Makefile @@ -0,0 +1 @@ +../Makefile
\ No newline at end of file diff --git a/src/delta/delta.c b/src/delta/delta.c new file mode 100644 index 0000000000..a65cea51bc --- /dev/null +++ b/src/delta/delta.c @@ -0,0 +1,490 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of systemd. + + Copyright 2012 Lennart Poettering + + 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 <assert.h> +#include <string.h> +#include <unistd.h> +#include <getopt.h> + +#include "hashmap.h" +#include "util.h" +#include "path-util.h" +#include "log.h" +#include "pager.h" +#include "build.h" + +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_DEFAULTS = + (SHOW_MASKED | SHOW_EQUIVALENT | SHOW_REDIRECTED | SHOW_OVERRIDDEN) +} 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(ANSI_HIGHLIGHT_RED_ON "[MASKED]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom); + return 1; +} + +static int notify_override_equivalent(const char *top, const char *bottom) { + if (!(arg_flags & SHOW_EQUIVALENT)) + return 0; + + printf(ANSI_HIGHLIGHT_GREEN_ON "[EQUIVALENT]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom); + return 1; +} + +static int notify_override_redirected(const char *top, const char *bottom) { + if (!(arg_flags & SHOW_REDIRECTED)) + return 0; + + printf(ANSI_HIGHLIGHT_ON "[REDIRECTED]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, bottom); + return 1; +} + +static int notify_override_overridden(const char *top, const char *bottom) { + if (!(arg_flags & SHOW_OVERRIDDEN)) + return 0; + + printf(ANSI_HIGHLIGHT_ON "[OVERRIDDEN]" ANSI_HIGHLIGHT_OFF " %s → %s\n", top, 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) { + notify_override_masked(top, bottom); + return 0; + } + + k = readlink_malloc(top, &dest); + if (k >= 0) { + if (equivalent(dest, bottom) > 0) + notify_override_equivalent(top, bottom); + else + notify_override_redirected(top, bottom); + + return 0; + } + + notify_override_overridden(top, bottom); + if (!arg_diff) + return 0; + + putchar('\n'); + + fflush(stdout); + + pid = fork(); + if (pid < 0) { + log_error("Failed to fork off diff: %m"); + return -errno; + } else if (pid == 0) { + execlp("diff", "diff", "-us", "--", bottom, top, NULL); + log_error("Failed to execute diff: %m"); + _exit(1); + } + + wait_for_terminate(pid, NULL); + + putchar('\n'); + + return 0; +} + +static int enumerate_dir(Hashmap *top, Hashmap *bottom, const char *path) { + _cleanup_closedir_ DIR *d; + + assert(top); + assert(bottom); + assert(path); + + d = opendir(path); + if (!d) { + if (errno == ENOENT) + return 0; + + log_error("Failed to enumerate %s: %m", path); + return -errno; + } + + for (;;) { + struct dirent *de; + union dirent_storage buf; + int k; + char *p; + + k = readdir_r(d, &buf.de, &de); + if (k != 0) + return -k; + + if (!de) + break; + + if (!dirent_is_file(de)) + continue; + + p = strjoin(path, "/", de->d_name, NULL); + if (!p) + return -ENOMEM; + + path_kill_slashes(p); + + k = hashmap_put(top, path_get_file_name(p), p); + if (k >= 0) { + p = strdup(p); + if (!p) + return -ENOMEM; + } else if (k != -EEXIST) { + free(p); + return k; + } + + free(hashmap_remove(bottom, path_get_file_name(p))); + k = hashmap_put(bottom, path_get_file_name(p), p); + if (k < 0) { + free(p); + return k; + } + } + + return 0; +} + +static int process_suffix(const char *prefixes, const char *suffix) { + const char *p; + char *f; + Hashmap *top, *bottom=NULL; + int r = 0, k; + Iterator i; + int n_found = 0; + + assert(prefixes); + assert(suffix); + + top = hashmap_new(string_hash_func, string_compare_func); + if (!top) { + r = -ENOMEM; + goto finish; + } + + bottom = hashmap_new(string_hash_func, string_compare_func); + if (!bottom) { + 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, t); + if (k < 0) + r = k; + + log_debug("Looking at %s", t); + } + + HASHMAP_FOREACH(f, top, i) { + char *o; + + o = hashmap_get(bottom, path_get_file_name(f)); + assert(o); + + if (path_equal(o, f)) { + notify_override_unchanged(f); + continue; + } + + k = found_override(f, o); + if (k < 0) + r = k; + + n_found ++; + } + +finish: + if (top) + hashmap_free_free(top); + if (bottom) + hashmap_free_free(bottom); + + return r < 0 ? r : n_found; +} + +static int process_suffix_chop(const char *prefixes, const char *suffix) { + const char *p; + + assert(prefixes); + assert(suffix); + + if (!path_is_absolute(suffix)) + return process_suffix(prefixes, suffix); + + /* Strip prefix from the suffix */ + NULSTR_FOREACH(p, prefixes) { + if (startswith(suffix, p)) { + suffix += strlen(p); + suffix += strspn(suffix, "/"); + return process_suffix(prefixes, suffix); + } + } + + log_error("Invalid suffix specification %s.", suffix); + 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) { + char *w, *state; + size_t l; + + FOREACH_WORD(w, l, flag_str, state) { + if (strncmp("masked", w, l) == 0) + flags |= SHOW_MASKED; + else if (strncmp ("equivalent", w, l) == 0) + flags |= SHOW_EQUIVALENT; + else if (strncmp("redirected", w, l) == 0) + flags |= SHOW_REDIRECTED; + else if (strncmp("overridden", w, l) == 0) + flags |= SHOW_OVERRIDDEN; + else if (strncmp("unchanged", w, l) == 0) + flags |= SHOW_UNCHANGED; + else if (strncmp("default", w, l) == 0) + 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' }, + { NULL, 0, NULL, 0 } + }; + + 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: + puts(PACKAGE_STRING); + puts(DISTRIBUTION); + puts(SYSTEMD_FEATURES); + return 0; + + case ARG_NO_PAGER: + arg_no_pager = true; + break; + + case '?': + return -EINVAL; + + 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; + } else if (b) + arg_diff = 1; + else + arg_diff = 0; + } + break; + + default: + log_error("Unknown option code %c", c); + return -EINVAL; + } + } + + return 1; +} + +int main(int argc, char *argv[]) { + + 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 + ; + + 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"; + + int r = 0, k; + int 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; + + if (!arg_no_pager) + pager_open(); + + if (optind < argc) { + int i; + + for (i = optind; i < argc; i++) { + k = process_suffix_chop(prefixes, argv[i]); + if (k < 0) + r = k; + else + n_found += k; + } + + } else { + const char *n; + + NULSTR_FOREACH(n, suffixes) { + k = process_suffix(prefixes, n); + if (k < 0) + r = k; + else + n_found += k; + } + } + + if (r >= 0) + printf("\n%i overridden configuration files found.\n", n_found); + +finish: + pager_close(); + + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} |