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systemd/0030-escape-beef-up-new-systemd-escape-tool.patch
Zbigniew Jędrzejewski-Szmek 43ff24caab Pull bugfixes and some small features from upstream
2014-07-19 15:47:59 -04:00

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From ee228789816679b6fff19c7c2f637eb0a1a3fcc4 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 7 Jul 2014 22:23:00 +0200
Subject: [PATCH] escape: beef up new systemd-escape tool
Add various options for making it easy unescape, or mangle, or format as
template instance or append a suffix.
(cherry picked from commit a1948c7bfeb87b54bc7715a44490c01593ee6e23)
Conflicts:
.gitignore
---
.gitignore | 1 +
src/escape/Makefile | 1 +
src/escape/escape.c | 215 +++++++++++++++++++++++++++++++++++++++++++++++++---
3 files changed, 206 insertions(+), 11 deletions(-)
create mode 120000 src/escape/Makefile
diff --git a/.gitignore b/.gitignore
index 9523ea027e..e08aa52aee 100644
--- a/.gitignore
+++ b/.gitignore
@@ -64,6 +64,7 @@
/systemd-delta
/systemd-detect-virt
/systemd-efi-boot-generator
+/systemd-escape
/systemd-fsck
/systemd-fstab-generator
/systemd-getty-generator
diff --git a/src/escape/Makefile b/src/escape/Makefile
new file mode 120000
index 0000000000..d0b0e8e008
--- /dev/null
+++ b/src/escape/Makefile
@@ -0,0 +1 @@
+../Makefile
\ No newline at end of file
diff --git a/src/escape/escape.c b/src/escape/escape.c
index 0a59a05e28..ae0c183eca 100644
--- a/src/escape/escape.c
+++ b/src/escape/escape.c
@@ -21,26 +21,219 @@
#include <stdio.h>
#include <stdlib.h>
+#include <getopt.h>
#include "log.h"
#include "unit-name.h"
+#include "build.h"
+#include "strv.h"
-int main(int argc, char *argv[]) {
- char *escaped_name = NULL;
+static enum {
+ ACTION_ESCAPE,
+ ACTION_UNESCAPE,
+ ACTION_MANGLE
+} arg_action = ACTION_ESCAPE;
+static const char *arg_suffix = NULL;
+static const char *arg_template = NULL;
+static bool arg_path = false;
+
+static int help(void) {
+
+ printf("%s [OPTIONS...] [NAME...]\n\n"
+ "Show system and user paths.\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " --suffix=SUFFIX Unit suffix to append to escaped strings\n"
+ " --template=TEMPLATE Insert strings as instance into template\n"
+ " -u --unescape Unescape strings\n"
+ " -m --mangle Mangle strings\n"
+ " -p --path When escaping/unescaping assume the string is a path\n",
+ program_invocation_short_name);
+
+ return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_SUFFIX,
+ ARG_TEMPLATE
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "suffix", required_argument, NULL, ARG_SUFFIX },
+ { "template", required_argument, NULL, ARG_TEMPLATE },
+ { "unescape", no_argument, NULL, 'u' },
+ { "mangle", no_argument, NULL, 'm' },
+ { "path", no_argument, NULL, 'p' },
+ {}
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "hump", options, NULL)) >= 0) {
+
+ switch (c) {
+
+ case 'h':
+ return help();
+
+ case ARG_VERSION:
+ puts(PACKAGE_STRING);
+ puts(SYSTEMD_FEATURES);
+ return 0;
+
+ case ARG_SUFFIX:
+
+ if (unit_type_from_string(optarg) < 0) {
+ log_error("Invalid unit suffix type %s.", optarg);
+ return -EINVAL;
+ }
+
+ arg_suffix = optarg;
+ break;
+
+ case ARG_TEMPLATE:
+
+ if (!unit_name_is_valid(optarg, true) || !unit_name_is_template(optarg)) {
+ log_error("Template name %s is not valid.", optarg);
+ return -EINVAL;
+ }
+
+ arg_template = optarg;
+ break;
+
+ case 'u':
+ arg_action = ACTION_UNESCAPE;
+ break;
+
+ case 'm':
+ arg_action = ACTION_MANGLE;
+ break;
+
+ case 'p':
+ arg_path = true;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached("Unhandled option");
+ }
+ }
- if (argc != 2) {
- log_error("This program requires on argument.");
- return EXIT_FAILURE;
+ if (optind >= argc) {
+ log_error("Not enough arguments.");
+ return -EINVAL;
}
- escaped_name = unit_name_escape(argv[1]);
+ if (arg_template && arg_suffix) {
+ log_error("--suffix= and --template= may not be combined.");
+ return -EINVAL;
+ }
+
+ if ((arg_template || arg_suffix) && arg_action != ACTION_ESCAPE) {
+ log_error("--suffix= and --template= are not compatible with --unescape or --mangle.");
+ return -EINVAL;
+ }
+
+ if (arg_path && !IN_SET(arg_action, ACTION_ESCAPE, ACTION_UNESCAPE)) {
+ log_error("--path may not be combined with --mangle.");
+ return -EINVAL;
+ }
+
+ return 1;
+}
+
+int main(int argc, char *argv[]) {
+ char **i;
+ int r;
+
+ log_parse_environment();
+ log_open();
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ goto finish;
+
+ STRV_FOREACH(i, argv + optind) {
+ _cleanup_free_ char *e = NULL;
+
+ switch (arg_action) {
+
+ case ACTION_ESCAPE:
+ if (arg_path)
+ e = unit_name_path_escape(*i);
+ else
+ e = unit_name_escape(*i);
+
+ if (!e) {
+ r = log_oom();
+ goto finish;
+ }
+
+ if (arg_template) {
+ char *x;
+
+ x = unit_name_replace_instance(arg_template, e);
+ if (!x) {
+ r = log_oom();
+ goto finish;
+ }
+
+ free(e);
+ e = x;
+ } else if (arg_suffix) {
+ char *x;
+
+ x = strjoin(e, ".", arg_suffix, NULL);
+ if (!x) {
+ r = log_oom();
+ goto finish;
+ }
+
+ free(e);
+ e = x;
+ }
+
+ break;
+
+ case ACTION_UNESCAPE:
+ if (arg_path)
+ e = unit_name_path_unescape(*i);
+ else
+ e = unit_name_unescape(*i);
+
+ if (!e) {
+ r = log_oom();
+ goto finish;
+ }
+ break;
+
+ case ACTION_MANGLE:
+ e = unit_name_mangle(*i, MANGLE_NOGLOB);
+ if (!e) {
+ r = log_oom();
+ goto finish;
+ }
+ break;
+ }
+
+ if (i != argv+optind)
+ fputc(' ', stdout);
- if (!escaped_name) {
- log_error("Failed to escape name.");
- return EXIT_FAILURE;
+ fputs(e, stdout);
}
- printf("%s", escaped_name);
+ fputc('\n', stdout);
- return EXIT_SUCCESS;
+finish:
+ return r ? EXIT_FAILURE : EXIT_SUCCESS;
}
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