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de61a04b18
This fixes repart's, systemctl's, sysusers' and tmpfiles' specifier expansion to honour the root dir specified with --root=. This is relevant for specifiers such as %m, %o, … which are directly sourced from files on disk. This doesn't try to be overly smart: specifiers referring to runtime concepts (i.e. boot ID, architecture, hostname) rather than files on the medium are left as is. There's certainly a point to be made that they should fail in case --root= is specified, but I am not entirely convinced about that, and it's certainly something we can look into later if there's reason to. I wondered for a while how to hook this up best, but given that quite a large number of specifiers resolve to data from files on disks, and most of our tools needs this, I ultimately decided to make the root dir a first class parameter to specifier_printf(). Replaces: #16187 Fixes: #16183
101 lines
5.3 KiB
C
101 lines
5.3 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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#include "string-util.h"
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typedef int (*SpecifierCallback)(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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typedef struct Specifier {
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const char specifier;
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const SpecifierCallback lookup;
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const void *data;
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} Specifier;
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int specifier_printf(const char *text, size_t max_length, const Specifier table[], const char *root, const void *userdata, char **ret);
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int specifier_string(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_machine_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_boot_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_host_name(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_short_host_name(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_kernel_release(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_architecture(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_os_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_os_version_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_os_build_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_os_variant_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_os_image_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_os_image_version(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_group_name(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_group_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_user_name(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_user_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_user_home(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_user_shell(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_tmp_dir(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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int specifier_var_tmp_dir(char specifier, const void *data, const char *root, const void *userdata, char **ret);
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/* Typically, in places where one of the above specifier is to be resolved the other similar ones are to be
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* resolved, too. Hence let's define common macros for the relevant array entries.
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*
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* COMMON_SYSTEM_SPECIFIERS:
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* %a: the native userspace architecture
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* %A: the OS image version, according to /etc/os-release
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* %b: the boot ID of the running system
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* %B: the OS build ID, according to /etc/os-release
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* %H: the hostname of the running system
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* %l: the short hostname of the running system
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* %m: the machine ID of the running system
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* %M: the OS image ID, according to /etc/os-release
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* %o: the OS ID according to /etc/os-release
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* %v: the kernel version
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* %w: the OS version ID, according to /etc/os-release
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* %W: the OS variant ID, according to /etc/os-release
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*
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* COMMON_CREDS_SPECIFIERS:
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* %g: the groupname of the running user
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* %G: the GID of the running user
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* %u: the username of the running user
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* %U: the UID of the running user
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*
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* COMMON_TMP_SPECIFIERS:
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* %T: the temporary directory (e.g. /tmp, or $TMPDIR, $TEMP, $TMP)
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* %V: the temporary directory for large, persistent stuff (e.g. /var/tmp, or $TMPDIR, $TEMP, $TMP)
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*/
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#define COMMON_SYSTEM_SPECIFIERS \
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{ 'a', specifier_architecture, NULL }, \
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{ 'A', specifier_os_image_version,NULL }, \
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{ 'b', specifier_boot_id, NULL }, \
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{ 'B', specifier_os_build_id, NULL }, \
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{ 'H', specifier_host_name, NULL }, \
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{ 'l', specifier_short_host_name, NULL }, \
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{ 'm', specifier_machine_id, NULL }, \
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{ 'M', specifier_os_image_id, NULL }, \
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{ 'o', specifier_os_id, NULL }, \
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{ 'v', specifier_kernel_release, NULL }, \
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{ 'w', specifier_os_version_id, NULL }, \
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{ 'W', specifier_os_variant_id, NULL }
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#define COMMON_CREDS_SPECIFIERS \
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{ 'g', specifier_group_name, NULL }, \
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{ 'G', specifier_group_id, NULL }, \
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{ 'u', specifier_user_name, NULL }, \
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{ 'U', specifier_user_id, NULL }
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#define COMMON_TMP_SPECIFIERS \
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{ 'T', specifier_tmp_dir, NULL }, \
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{ 'V', specifier_var_tmp_dir, NULL }
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static inline char* specifier_escape(const char *string) {
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return strreplace(string, "%", "%%");
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}
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int specifier_escape_strv(char **l, char ***ret);
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/* A generic specifier table consisting of COMMON_SYSTEM_SPECIFIERS and COMMON_TMP_SPECIFIERS */
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extern const Specifier system_and_tmp_specifier_table[];
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