X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fcore%2Funit-printf.c;fp=src%2Fcore%2Funit-printf.c;h=0000000000000000000000000000000000000000;hp=90cb5040c19f7a88d3ef1e5881b8f7da68f7c0f4;hb=9ad77dd132a43bcb42ec391d0f7acee8935bde6c;hpb=f48dd74a8d39b6074f820f904953f5cece03b9b0 diff --git a/src/core/unit-printf.c b/src/core/unit-printf.c deleted file mode 100644 index 90cb5040c..000000000 --- a/src/core/unit-printf.c +++ /dev/null @@ -1,446 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2010 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 . -***/ - -#include "unit.h" -#include "specifier.h" -#include "strv.h" -#include "unit-name.h" -#include "unit-printf.h" -#include "macro.h" -#include "cgroup-util.h" - -static int specifier_prefix_and_instance(char specifier, void *data, void *userdata, char **ret) { - Unit *u = userdata; - char *n; - - assert(u); - - n = unit_name_to_prefix_and_instance(u->id); - if (!n) - return -ENOMEM; - - *ret = n; - return 0; -} - -static int specifier_prefix(char specifier, void *data, void *userdata, char **ret) { - Unit *u = userdata; - char *n; - - assert(u); - - n = unit_name_to_prefix(u->id); - if (!n) - return -ENOMEM; - - *ret = n; - return 0; -} - -static int specifier_prefix_unescaped(char specifier, void *data, void *userdata, char **ret) { - Unit *u = userdata; - _cleanup_free_ char *p = NULL; - char *n; - - assert(u); - - p = unit_name_to_prefix(u->id); - if (!p) - return -ENOMEM; - - n = unit_name_unescape(p); - if (!n) - return -ENOMEM; - - *ret = n; - return 0; -} - -static int specifier_instance_unescaped(char specifier, void *data, void *userdata, char **ret) { - Unit *u = userdata; - char *n; - - assert(u); - - if (!u->instance) - return -EOPNOTSUPP; - - n = unit_name_unescape(u->instance); - if (!n) - return -ENOMEM; - - *ret = n; - return 0; -} - -static int specifier_filename(char specifier, void *data, void *userdata, char **ret) { - Unit *u = userdata; - char *n; - - assert(u); - - if (u->instance) - n = unit_name_path_unescape(u->instance); - else - n = unit_name_to_path(u->id); - if (!n) - return -ENOMEM; - - *ret = n; - return 0; -} - -static int specifier_cgroup(char specifier, void *data, void *userdata, char **ret) { - Unit *u = userdata; - char *n; - - assert(u); - - if (u->cgroup_path) - n = strdup(u->cgroup_path); - else - n = unit_default_cgroup_path(u); - if (!n) - return -ENOMEM; - - *ret = n; - return 0; -} - -static int specifier_cgroup_root(char specifier, void *data, void *userdata, char **ret) { - Unit *u = userdata; - const char *slice; - char *n; - int r; - - assert(u); - - slice = unit_slice_name(u); - if (specifier == 'R' || !slice) - n = strdup(u->manager->cgroup_root); - else { - _cleanup_free_ char *p = NULL; - - r = cg_slice_to_path(slice, &p); - if (r < 0) - return r; - - n = strjoin(u->manager->cgroup_root, "/", p, NULL); - if (!n) - return -ENOMEM; - } - - *ret = n; - return 0; -} - -static int specifier_runtime(char specifier, void *data, void *userdata, char **ret) { - Unit *u = userdata; - const char *e; - char *n = NULL; - - assert(u); - - if (u->manager->running_as == SYSTEMD_SYSTEM) - e = "/run"; - else { - e = getenv("XDG_RUNTIME_DIR"); - if (!e) - return -EOPNOTSUPP; - } - - n = strdup(e); - if (!n) - return -ENOMEM; - - *ret = n; - return 0; -} - -static int specifier_user_name(char specifier, void *data, void *userdata, char **ret) { - char *printed = NULL; - Unit *u = userdata; - ExecContext *c; - int r = 0; - - assert(u); - - c = unit_get_exec_context(u); - if (!c) - return -EOPNOTSUPP; - - if (u->manager->running_as == SYSTEMD_SYSTEM) { - - /* We cannot use NSS from PID 1, hence try to make the - * best of it in that case, and fail if we can't help - * it */ - - if (!c->user || streq(c->user, "root") || streq(c->user, "0")) - printed = strdup(specifier == 'u' ? "root" : "0"); - else { - if (specifier == 'u') - printed = strdup(c->user); - else { - uid_t uid; - - r = parse_uid(c->user, &uid); - if (r < 0) - return -ENODATA; - - r = asprintf(&printed, UID_FMT, uid); - } - } - - } else { - _cleanup_free_ char *tmp = NULL; - const char *username = NULL; - uid_t uid; - - if (c->user) - username = c->user; - else - /* get USER env from env or our own uid */ - username = tmp = getusername_malloc(); - - /* fish username from passwd */ - r = get_user_creds(&username, &uid, NULL, NULL, NULL); - if (r < 0) - return r; - - if (specifier == 'u') - printed = strdup(username); - else - r = asprintf(&printed, UID_FMT, uid); - } - - if (r < 0 || !printed) - return -ENOMEM; - - *ret = printed; - return 0; -} - -static int specifier_user_home(char specifier, void *data, void *userdata, char **ret) { - Unit *u = userdata; - ExecContext *c; - char *n; - int r; - - assert(u); - - c = unit_get_exec_context(u); - if (!c) - return -EOPNOTSUPP; - - if (u->manager->running_as == SYSTEMD_SYSTEM) { - - /* We cannot use NSS from PID 1, hence try to make the - * best of it if we can, but fail if we can't */ - - if (!c->user || streq(c->user, "root") || streq(c->user, "0")) - n = strdup("/root"); - else - return -EOPNOTSUPP; - - } else { - - /* return HOME if set, otherwise from passwd */ - if (!c || !c->user) { - r = get_home_dir(&n); - if (r < 0) - return r; - } else { - const char *username, *home; - - username = c->user; - r = get_user_creds(&username, NULL, NULL, &home, NULL); - if (r < 0) - return r; - - n = strdup(home); - } - } - - if (!n) - return -ENOMEM; - - *ret = n; - return 0; -} - -static int specifier_user_shell(char specifier, void *data, void *userdata, char **ret) { - Unit *u = userdata; - ExecContext *c; - char *n; - int r; - - assert(u); - - c = unit_get_exec_context(u); - if (!c) - return -EOPNOTSUPP; - - if (u->manager->running_as == SYSTEMD_SYSTEM) { - - /* We cannot use NSS from PID 1, hence try to make the - * best of it if we can, but fail if we can't */ - - if (!c->user || streq(c->user, "root") || streq(c->user, "0")) - n = strdup("/bin/sh"); - else - return -EOPNOTSUPP; - - } else { - - /* return /bin/sh for root, otherwise the value from passwd */ - if (!c->user) { - r = get_shell(&n); - if (r < 0) - return r; - } else { - const char *username, *shell; - - username = c->user; - r = get_user_creds(&username, NULL, NULL, NULL, &shell); - if (r < 0) - return r; - - n = strdup(shell); - } - } - - if (!n) - return -ENOMEM; - - *ret = n; - return 0; -} - -int unit_name_printf(Unit *u, const char* format, char **ret) { - - /* - * This will use the passed string as format string and - * replace the following specifiers: - * - * %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) - */ - - const Specifier table[] = { - { 'n', specifier_string, u->id }, - { 'N', specifier_prefix_and_instance, NULL }, - { 'p', specifier_prefix, NULL }, - { 'i', specifier_string, u->instance }, - { 0, NULL, NULL } - }; - - assert(u); - assert(format); - assert(ret); - - return specifier_printf(format, table, u, ret); -} - -int unit_full_printf(Unit *u, const char *format, char **ret) { - - /* This is similar to unit_name_printf() but also supports - * unescaping. Also, adds a couple of additional codes: - * - * %f the instance if set, otherwise the id - * %c cgroup path of unit - * %r where units in this slice are placed in the cgroup tree - * %R the root of this systemd's instance tree - * %t the runtime directory to place sockets in (e.g. "/run" or $XDG_RUNTIME_DIR) - * %U the UID of the configured user or running user - * %u the username of the configured user or running user - * %h the homedir of the configured user or running user - * %s the shell 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 - * %v `uname -r` of the running system - */ - - const Specifier table[] = { - { 'n', specifier_string, u->id }, - { 'N', specifier_prefix_and_instance, NULL }, - { 'p', specifier_prefix, NULL }, - { 'P', specifier_prefix_unescaped, NULL }, - { 'i', specifier_string, u->instance }, - { 'I', specifier_instance_unescaped, NULL }, - - { 'f', specifier_filename, NULL }, - { 'c', specifier_cgroup, NULL }, - { 'r', specifier_cgroup_root, NULL }, - { 'R', specifier_cgroup_root, NULL }, - { 't', specifier_runtime, NULL }, - { 'U', specifier_user_name, NULL }, - { 'u', specifier_user_name, NULL }, - { 'h', specifier_user_home, NULL }, - { 's', specifier_user_shell, NULL }, - - { 'm', specifier_machine_id, NULL }, - { 'H', specifier_host_name, NULL }, - { 'b', specifier_boot_id, NULL }, - { 'v', specifier_kernel_release, NULL }, - {} - }; - - assert(u); - assert(format); - assert(ret); - - return specifier_printf(format, table, u, ret); -} - -int unit_full_printf_strv(Unit *u, char **l, char ***ret) { - size_t n; - char **r, **i, **j; - int q; - - /* Applies unit_full_printf to every entry in l */ - - assert(u); - - n = strv_length(l); - r = new(char*, n+1); - if (!r) - return -ENOMEM; - - for (i = l, j = r; *i; i++, j++) { - q = unit_full_printf(u, *i, j); - if (q < 0) - goto fail; - } - - *j = NULL; - *ret = r; - return 0; - -fail: - for (j--; j >= r; j--) - free(*j); - - free(r); - return q; -}