diff options
Diffstat (limited to 'src/escape/escape.c')
| -rw-r--r-- | src/escape/escape.c | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/src/escape/escape.c b/src/escape/escape.c new file mode 100644 index 0000000..8b38d9f --- /dev/null +++ b/src/escape/escape.c @@ -0,0 +1,258 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ + +#include <getopt.h> +#include <stdio.h> +#include <stdlib.h> + +#include "alloc-util.h" +#include "log.h" +#include "main-func.h" +#include "pretty-print.h" +#include "string-util.h" +#include "strv.h" +#include "unit-name.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 bool arg_instance = false; + +static int help(void) { + _cleanup_free_ char *link = NULL; + int r; + + r = terminal_urlify_man("systemd-escape", "1", &link); + if (r < 0) + return log_oom(); + + printf("%s [OPTIONS...] [NAME...]\n\n" + "Escape strings for usage in systemd unit names.\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" + " --instance With --unescape, show just the instance part\n" + " -u --unescape Unescape strings\n" + " -m --mangle Mangle strings\n" + " -p --path When escaping/unescaping assume the string is a path\n" + "\nSee the %s for details.\n" + , program_invocation_short_name + , link + ); + + 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' }, + { "instance", no_argument, NULL, 'i' }, + {} + }; + + 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: + return version(); + + case ARG_SUFFIX: + + if (unit_type_from_string(optarg) < 0) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Invalid unit suffix type %s.", optarg); + + arg_suffix = optarg; + break; + + case ARG_TEMPLATE: + + if (!unit_name_is_valid(optarg, UNIT_NAME_TEMPLATE)) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Template name %s is not valid.", optarg); + + 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 'i': + arg_instance = true; + break; + + case '?': + return -EINVAL; + + default: + assert_not_reached("Unhandled option"); + } + + if (optind >= argc) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Not enough arguments."); + + if (arg_template && arg_suffix) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "--suffix= and --template= may not be combined."); + + if ((arg_template || arg_suffix) && arg_action == ACTION_MANGLE) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "--suffix= and --template= are not compatible with --mangle."); + + if (arg_suffix && arg_action == ACTION_UNESCAPE) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "--suffix is not compatible with --unescape."); + + if (arg_path && !IN_SET(arg_action, ACTION_ESCAPE, ACTION_UNESCAPE)) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "--path may not be combined with --mangle."); + + if (arg_instance && arg_action != ACTION_UNESCAPE) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "--instance must be used in conjunction with --unescape."); + + if (arg_instance && arg_template) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "--instance may not be combined with --template."); + + return 1; +} + +static int run(int argc, char *argv[]) { + char **i; + int r; + + log_parse_environment(); + log_open(); + + r = parse_argv(argc, argv); + if (r <= 0) + return r; + + STRV_FOREACH(i, argv + optind) { + _cleanup_free_ char *e = NULL; + + switch (arg_action) { + + case ACTION_ESCAPE: + if (arg_path) { + r = unit_name_path_escape(*i, &e); + if (r < 0) + return log_error_errno(r, "Failed to escape string: %m"); + } else { + e = unit_name_escape(*i); + if (!e) + return log_oom(); + } + + if (arg_template) { + char *x; + + r = unit_name_replace_instance(arg_template, e, &x); + if (r < 0) + return log_error_errno(r, "Failed to replace instance: %m"); + + free_and_replace(e, x); + } else if (arg_suffix) { + char *x; + + x = strjoin(e, ".", arg_suffix); + if (!x) + return log_oom(); + + free_and_replace(e, x); + } + + break; + + case ACTION_UNESCAPE: { + _cleanup_free_ char *name = NULL; + + if (arg_template || arg_instance) { + _cleanup_free_ char *template = NULL; + + r = unit_name_to_instance(*i, &name); + if (r < 0) + return log_error_errno(r, "Failed to extract instance: %m"); + if (isempty(name)) + return log_error("Unit %s is missing the instance name.", *i); + + r = unit_name_template(*i, &template); + if (r < 0) + return log_error_errno(r, "Failed to extract template: %m"); + if (arg_template && !streq(arg_template, template)) + return log_error("Unit %s template %s does not match specified template %s.", + *i, template, arg_template); + } else { + name = strdup(*i); + if (!name) + return log_oom(); + } + + if (arg_path) + r = unit_name_path_unescape(name, &e); + else + r = unit_name_unescape(name, &e); + if (r < 0) + return log_error_errno(r, "Failed to unescape string: %m"); + + break; + } + + case ACTION_MANGLE: + r = unit_name_mangle(*i, 0, &e); + if (r < 0) + return log_error_errno(r, "Failed to mangle name: %m"); + + break; + } + + if (i != argv + optind) + fputc(' ', stdout); + + fputs(e, stdout); + } + + fputc('\n', stdout); + + return 0; +} + +DEFINE_MAIN_FUNCTION(run); |