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escape: beef up new systemd-escape tool

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Add various options for making it easy unescape, or mangle, or format as
template instance or append a suffix.
This commit is contained in:
Lennart Poettering 2014-07-07 22:23:00 +02:00
parent b1a5a9989a
commit a1948c7bfe
3 changed files with 208 additions and 13 deletions
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1
.gitignore vendored
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@ -64,6 +64,7 @@
/systemd-delta
/systemd-detect-virt
/systemd-efi-boot-generator
/systemd-escape
/systemd-firstboot
/systemd-fsck
/systemd-fstab-generator

1
src/escape/Makefile Symbolic link
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@ -0,0 +1 @@
../Makefile

219
src/escape/escape.c
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@ -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"
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 (optind >= argc) {
log_error("Not enough arguments.");
return -EINVAL;
}
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 *escaped_name = NULL;
char **i;
int r;
if (argc != 2) {
log_error("This program requires on argument.");
return EXIT_FAILURE;
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);
fputs(e, stdout);
}
escaped_name = unit_name_escape(argv[1]);
fputc('\n', stdout);
if (!escaped_name) {
log_error("Failed to escape name.");
return EXIT_FAILURE;
}
printf("%s", escaped_name);
return EXIT_SUCCESS;
finish:
return r ? EXIT_FAILURE : EXIT_SUCCESS;
}