diff options
Diffstat (limited to 'src/shared/install-printf.c')
| -rw-r--r-- | src/shared/install-printf.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/src/shared/install-printf.c b/src/shared/install-printf.c new file mode 100644 index 0000000000..c44459b4e0 --- /dev/null +++ b/src/shared/install-printf.c @@ -0,0 +1,132 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of systemd. + + 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 <assert.h> +#include <stdlib.h> + +#include "specifier.h" +#include "unit-name.h" +#include "util.h" +#include "install-printf.h" + +static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) { + InstallInfo *i = userdata; + assert(i); + + return unit_name_to_prefix_and_instance(i->name); +} + +static char *specifier_prefix(char specifier, void *data, void *userdata) { + InstallInfo *i = userdata; + assert(i); + + return unit_name_to_prefix(i->name); +} + +static char *specifier_instance(char specifier, void *data, void *userdata) { + InstallInfo *i = userdata; + char *instance; + int r; + + assert(i); + + r = unit_name_to_instance(i->name, &instance); + if (r < 0) + return NULL; + if (instance != NULL) + return instance; + else + return strdup(""); +} + +static char *specifier_user_name(char specifier, void *data, void *userdata) { + InstallInfo *i = userdata; + const char *username; + _cleanup_free_ char *tmp = NULL; + char *printed = NULL; + + assert(i); + + if (i->user) + username = i->user; + else + /* get USER env from env or our own uid */ + username = tmp = getusername_malloc(); + + switch (specifier) { + case 'u': + printed = strdup(username); + break; + case 'U': { + /* fish username from passwd */ + uid_t uid; + int r; + + r = get_user_creds(&username, &uid, NULL, NULL, NULL); + if (r < 0) + return NULL; + + if (asprintf(&printed, "%d", uid) < 0) + return NULL; + break; + }} + + return printed; +} + + +char *install_full_printf(InstallInfo *i, const char *format) { + + /* This is similar to unit_full_printf() but does not support + * anything path-related. + * + * %n: the full id of the unit (foo@bar.waldo) + * %N: the id of the unit without the suffix (foo@bar) + * %p: the prefix (foo) + * %i: the instance (bar) + + * %U the UID of the configured user or running user + * %u the username of the configured user or running user + * %m the machine ID of the running system + * %H the host name of the running system + * %b the boot ID of the running system + */ + + const Specifier table[] = { + { 'n', specifier_string, i->name }, + { 'N', specifier_prefix_and_instance, NULL }, + { 'p', specifier_prefix, NULL }, + { 'i', specifier_instance, NULL }, + + { 'U', specifier_user_name, NULL }, + { 'u', specifier_user_name, NULL }, + + { 'm', specifier_machine_id, NULL }, + { 'H', specifier_host_name, NULL }, + { 'b', specifier_boot_id, NULL }, + { 0, NULL, NULL } + }; + + assert(i); + assert(format); + + return specifier_printf(format, table, i); +} |