tree-wide: make specifier expansion --root= aware
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
This commit is contained in:
Lennart Poettering
committed by
Zbigniew Jędrzejewski-Szmek
Zbigniew Jędrzejewski-Szmek
parent
0c651d32d4
commit
de61a04b18
@@ -13,7 +13,7 @@
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#include "unit-name.h"
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#include "user-util.h"
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static int specifier_prefix_and_instance(char specifier, const void *data, const void *userdata, char **ret) {
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static int specifier_prefix_and_instance(char specifier, const void *data, const char *root, const void *userdata, char **ret) {
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const UnitFileInstallInfo *i = userdata;
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_cleanup_free_ char *prefix = NULL;
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int r;
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@@ -37,7 +37,7 @@ static int specifier_prefix_and_instance(char specifier, const void *data, const
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return 0;
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}
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static int specifier_name(char specifier, const void *data, const void *userdata, char **ret) {
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static int specifier_name(char specifier, const void *data, const char *root, const void *userdata, char **ret) {
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const UnitFileInstallInfo *i = userdata;
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char *ans;
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@@ -53,7 +53,7 @@ static int specifier_name(char specifier, const void *data, const void *userdata
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return 0;
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}
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static int specifier_prefix(char specifier, const void *data, const void *userdata, char **ret) {
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static int specifier_prefix(char specifier, const void *data, const char *root, const void *userdata, char **ret) {
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const UnitFileInstallInfo *i = userdata;
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assert(i);
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@@ -61,7 +61,7 @@ static int specifier_prefix(char specifier, const void *data, const void *userda
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return unit_name_to_prefix(i->name, ret);
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}
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static int specifier_instance(char specifier, const void *data, const void *userdata, char **ret) {
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static int specifier_instance(char specifier, const void *data, const char *root, const void *userdata, char **ret) {
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const UnitFileInstallInfo *i = userdata;
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char *instance;
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int r;
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@@ -82,12 +82,12 @@ static int specifier_instance(char specifier, const void *data, const void *user
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return 0;
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}
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static int specifier_last_component(char specifier, const void *data, const void *userdata, char **ret) {
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static int specifier_last_component(char specifier, const void *data, const char *root, const void *userdata, char **ret) {
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_cleanup_free_ char *prefix = NULL;
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char *dash;
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int r;
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r = specifier_prefix(specifier, data, userdata, &prefix);
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r = specifier_prefix(specifier, data, root, userdata, &prefix);
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if (r < 0)
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return r;
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@@ -103,7 +103,7 @@ static int specifier_last_component(char specifier, const void *data, const void
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return 0;
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}
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int install_full_printf_internal(const UnitFileInstallInfo *i, const char *format, size_t max_length, char **ret) {
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int install_full_printf_internal(const UnitFileInstallInfo *i, const char *format, size_t max_length, const char *root, char **ret) {
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/* This is similar to unit_name_printf() */
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const Specifier table[] = {
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@@ -123,5 +123,5 @@ int install_full_printf_internal(const UnitFileInstallInfo *i, const char *forma
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assert(format);
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assert(ret);
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return specifier_printf(format, max_length, table, i, ret);
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return specifier_printf(format, max_length, table, root, i, ret);
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}
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@@ -4,10 +4,11 @@
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#include "install.h"
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#include "unit-name.h"
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int install_full_printf_internal(const UnitFileInstallInfo *i, const char *format, size_t max_length, char **ret);
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static inline int install_name_printf(const UnitFileInstallInfo *i, const char *format, char **ret) {
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return install_full_printf_internal(i, format, UNIT_NAME_MAX, ret);
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int install_full_printf_internal(const UnitFileInstallInfo *i, const char *format, size_t max_length, const char *root, char **ret);
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static inline int install_name_printf(const UnitFileInstallInfo *i, const char *format, const char *root, char **ret) {
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return install_full_printf_internal(i, format, UNIT_NAME_MAX, root, ret);
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}
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static inline int install_path_printf(const UnitFileInstallInfo *i, const char *format, char **ret) {
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return install_full_printf_internal(i, format, PATH_MAX-1, ret);
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static inline int install_path_printf(const UnitFileInstallInfo *i, const char *format, const char *root, char **ret) {
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return install_full_printf_internal(i, format, PATH_MAX-1, root, ret);
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}
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+19
-9
@@ -963,6 +963,7 @@ static void install_info_free(UnitFileInstallInfo *i) {
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free(i->name);
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free(i->path);
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free(i->root);
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strv_free(i->aliases);
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strv_free(i->wanted_by);
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strv_free(i->required_by);
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@@ -1023,6 +1024,7 @@ static int install_info_add(
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InstallContext *c,
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const char *name,
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const char *path,
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const char *root,
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bool auxiliary,
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UnitFileInstallInfo **ret) {
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@@ -1066,6 +1068,14 @@ static int install_info_add(
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goto fail;
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}
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if (root) {
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i->root = strdup(root);
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if (!i->root) {
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r = -ENOMEM;
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goto fail;
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}
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}
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if (path) {
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i->path = strdup(path);
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if (!i->path) {
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@@ -1147,11 +1157,11 @@ static int config_parse_also(
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if (r == 0)
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break;
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r = install_name_printf(info, word, &printed);
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r = install_name_printf(info, word, info->root, &printed);
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if (r < 0)
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return r;
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r = install_info_add(c, printed, NULL, true, NULL);
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r = install_info_add(c, printed, NULL, info->root, /* auxiliary= */ true, NULL);
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if (r < 0)
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return r;
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@@ -1194,7 +1204,7 @@ static int config_parse_default_instance(
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return log_syntax(unit, LOG_WARNING, filename, line, 0,
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"DefaultInstance= only makes sense for template units, ignoring.");
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r = install_name_printf(i, rvalue, &printed);
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r = install_name_printf(i, rvalue, i->root, &printed);
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if (r < 0)
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return r;
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@@ -1637,7 +1647,7 @@ static int install_info_traverse(
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bn = buffer;
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}
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r = install_info_add(c, bn, NULL, false, &i);
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r = install_info_add(c, bn, NULL, paths->root_dir, /* auxiliary= */ false, &i);
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if (r < 0)
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return r;
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@@ -1676,9 +1686,9 @@ static int install_info_add_auto(
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pp = prefix_roota(paths->root_dir, name_or_path);
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return install_info_add(c, NULL, pp, false, ret);
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return install_info_add(c, NULL, pp, paths->root_dir, /* auxiliary= */ false, ret);
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} else
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return install_info_add(c, name_or_path, NULL, false, ret);
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return install_info_add(c, name_or_path, NULL, paths->root_dir, /* auxiliary= */ false, ret);
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}
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static int install_info_discover(
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@@ -1820,7 +1830,7 @@ static int install_info_symlink_alias(
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STRV_FOREACH(s, i->aliases) {
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_cleanup_free_ char *alias_path = NULL, *dst = NULL, *dst_updated = NULL;
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q = install_path_printf(i, *s, &dst);
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q = install_path_printf(i, *s, i->root, &dst);
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if (q < 0)
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return q;
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@@ -1905,7 +1915,7 @@ static int install_info_symlink_wants(
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STRV_FOREACH(s, list) {
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_cleanup_free_ char *path = NULL, *dst = NULL;
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q = install_name_printf(i, *s, &dst);
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q = install_name_printf(i, *s, i->root, &dst);
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if (q < 0)
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return q;
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@@ -2687,7 +2697,7 @@ int unit_file_disable(
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if (!unit_name_is_valid(*i, UNIT_NAME_ANY))
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return -EINVAL;
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r = install_info_add(&c, *i, NULL, false, NULL);
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r = install_info_add(&c, *i, NULL, paths.root_dir, /* auxiliary= */ false, NULL);
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if (r < 0)
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return r;
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}
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@@ -79,6 +79,7 @@ enum UnitFileType {
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struct UnitFileInstallInfo {
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char *name;
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char *path;
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char *root;
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char **aliases;
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char **wanted_by;
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+57
-40
@@ -10,9 +10,11 @@
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#include "alloc-util.h"
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#include "architecture.h"
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#include "fd-util.h"
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#include "format-util.h"
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#include "fs-util.h"
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#include "hostname-util.h"
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#include "id128-util.h"
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#include "macro.h"
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#include "os-util.h"
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#include "specifier.h"
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@@ -29,7 +31,7 @@
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* and "%" used for escaping. */
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#define POSSIBLE_SPECIFIERS ALPHANUMERICAL "%"
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int specifier_printf(const char *text, size_t max_length, const Specifier table[], const void *userdata, char **ret) {
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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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_cleanup_free_ char *result = NULL;
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bool percent = false;
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const char *f;
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@@ -60,7 +62,7 @@ int specifier_printf(const char *text, size_t max_length, const Specifier table[
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_cleanup_free_ char *w = NULL;
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size_t k, j;
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r = i->lookup(i->specifier, i->data, userdata, &w);
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r = i->lookup(i->specifier, i->data, root, userdata, &w);
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if (r < 0)
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return r;
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@@ -104,7 +106,7 @@ int specifier_printf(const char *text, size_t max_length, const Specifier table[
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/* Generic handler for simple string replacements */
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int specifier_string(char specifier, const void *data, 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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char *n;
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n = strdup(strempty(data));
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@@ -115,12 +117,21 @@ int specifier_string(char specifier, const void *data, const void *userdata, cha
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return 0;
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}
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int specifier_machine_id(char specifier, const void *data, 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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sd_id128_t id;
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char *n;
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int r;
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r = sd_id128_get_machine(&id);
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if (root) {
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_cleanup_close_ int fd = -1;
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fd = chase_symlinks_and_open("/etc/machine-id", root, CHASE_PREFIX_ROOT, O_RDONLY|O_CLOEXEC|O_NOCTTY, NULL);
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if (fd < 0)
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return fd;
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r = id128_read_fd(fd, ID128_PLAIN, &id);
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} else
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r = sd_id128_get_machine(&id);
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if (r < 0)
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return r;
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@@ -132,7 +143,7 @@ int specifier_machine_id(char specifier, const void *data, const void *userdata,
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return 0;
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}
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int specifier_boot_id(char specifier, const void *data, 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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sd_id128_t id;
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char *n;
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int r;
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@@ -149,7 +160,7 @@ int specifier_boot_id(char specifier, const void *data, const void *userdata, ch
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return 0;
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}
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int specifier_host_name(char specifier, const void *data, 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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char *n;
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n = gethostname_malloc();
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@@ -160,7 +171,7 @@ int specifier_host_name(char specifier, const void *data, const void *userdata,
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return 0;
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}
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int specifier_short_host_name(char specifier, const void *data, 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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char *n;
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n = gethostname_short_malloc();
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@@ -171,7 +182,7 @@ int specifier_short_host_name(char specifier, const void *data, const void *user
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return 0;
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}
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int specifier_kernel_release(char specifier, const void *data, 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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struct utsname uts;
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char *n;
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int r;
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@@ -188,7 +199,7 @@ int specifier_kernel_release(char specifier, const void *data, const void *userd
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return 0;
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}
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int specifier_architecture(char specifier, const void *data, 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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char *t;
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t = strdup(architecture_to_string(uname_architecture()));
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@@ -199,11 +210,11 @@ int specifier_architecture(char specifier, const void *data, const void *userdat
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return 0;
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}
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static int specifier_os_release_common(const char *field, char **ret) {
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static int specifier_os_release_common(const char *field, const char *root, char **ret) {
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char *t = NULL;
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int r;
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r = parse_os_release(NULL, field, &t);
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r = parse_os_release(root, field, &t);
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if (r < 0)
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return r;
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if (!t) {
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@@ -218,31 +229,31 @@ static int specifier_os_release_common(const char *field, char **ret) {
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return 0;
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}
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int specifier_os_id(char specifier, const void *data, const void *userdata, char **ret) {
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return specifier_os_release_common("ID", 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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return specifier_os_release_common("ID", root, ret);
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}
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int specifier_os_version_id(char specifier, const void *data, const void *userdata, char **ret) {
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return specifier_os_release_common("VERSION_ID", 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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return specifier_os_release_common("VERSION_ID", root, ret);
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}
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int specifier_os_build_id(char specifier, const void *data, const void *userdata, char **ret) {
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return specifier_os_release_common("BUILD_ID", 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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return specifier_os_release_common("BUILD_ID", root, ret);
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}
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int specifier_os_variant_id(char specifier, const void *data, const void *userdata, char **ret) {
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return specifier_os_release_common("VARIANT_ID", 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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return specifier_os_release_common("VARIANT_ID", root, ret);
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}
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int specifier_os_image_id(char specifier, const void *data, const void *userdata, char **ret) {
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return specifier_os_release_common("IMAGE_ID", 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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return specifier_os_release_common("IMAGE_ID", root, ret);
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}
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int specifier_os_image_version(char specifier, const void *data, const void *userdata, char **ret) {
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return specifier_os_release_common("IMAGE_VERSION", 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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return specifier_os_release_common("IMAGE_VERSION", root, ret);
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}
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int specifier_group_name(char specifier, const void *data, 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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char *t;
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t = gid_to_name(getgid());
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@@ -253,14 +264,14 @@ int specifier_group_name(char specifier, const void *data, const void *userdata,
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return 0;
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}
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int specifier_group_id(char specifier, const void *data, 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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if (asprintf(ret, UID_FMT, getgid()) < 0)
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return -ENOMEM;
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return 0;
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}
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int specifier_user_name(char specifier, const void *data, 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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char *t;
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/* If we are UID 0 (root), this will not result in NSS, otherwise it might. This is good, as we want to be able
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@@ -278,7 +289,7 @@ int specifier_user_name(char specifier, const void *data, const void *userdata,
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return 0;
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}
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int specifier_user_id(char specifier, const void *data, const void *userdata, char **ret) {
|
||||
int specifier_user_id(char specifier, const void *data, const char *root, const void *userdata, char **ret) {
|
||||
|
||||
if (asprintf(ret, UID_FMT, getuid()) < 0)
|
||||
return -ENOMEM;
|
||||
@@ -286,7 +297,7 @@ int specifier_user_id(char specifier, const void *data, const void *userdata, ch
|
||||
return 0;
|
||||
}
|
||||
|
||||
int specifier_user_home(char specifier, const void *data, const void *userdata, char **ret) {
|
||||
int specifier_user_home(char specifier, const void *data, const char *root, const void *userdata, char **ret) {
|
||||
|
||||
/* On PID 1 (which runs as root) this will not result in NSS,
|
||||
* which is good. See above */
|
||||
@@ -294,7 +305,7 @@ int specifier_user_home(char specifier, const void *data, const void *userdata,
|
||||
return get_home_dir(ret);
|
||||
}
|
||||
|
||||
int specifier_user_shell(char specifier, const void *data, const void *userdata, char **ret) {
|
||||
int specifier_user_shell(char specifier, const void *data, const char *root, const void *userdata, char **ret) {
|
||||
|
||||
/* On PID 1 (which runs as root) this will not result in NSS,
|
||||
* which is good. See above */
|
||||
@@ -302,15 +313,18 @@ int specifier_user_shell(char specifier, const void *data, const void *userdata,
|
||||
return get_shell(ret);
|
||||
}
|
||||
|
||||
int specifier_tmp_dir(char specifier, const void *data, const void *userdata, char **ret) {
|
||||
int specifier_tmp_dir(char specifier, const void *data, const char *root, const void *userdata, char **ret) {
|
||||
const char *p;
|
||||
char *copy;
|
||||
int r;
|
||||
|
||||
r = tmp_dir(&p);
|
||||
if (r < 0)
|
||||
return r;
|
||||
|
||||
if (root) /* If root dir is set, don't honour $TMP or similar */
|
||||
p = "/tmp";
|
||||
else {
|
||||
r = tmp_dir(&p);
|
||||
if (r < 0)
|
||||
return r;
|
||||
}
|
||||
copy = strdup(p);
|
||||
if (!copy)
|
||||
return -ENOMEM;
|
||||
@@ -319,15 +333,18 @@ int specifier_tmp_dir(char specifier, const void *data, const void *userdata, ch
|
||||
return 0;
|
||||
}
|
||||
|
||||
int specifier_var_tmp_dir(char specifier, const void *data, const void *userdata, char **ret) {
|
||||
int specifier_var_tmp_dir(char specifier, const void *data, const char *root, const void *userdata, char **ret) {
|
||||
const char *p;
|
||||
char *copy;
|
||||
int r;
|
||||
|
||||
r = var_tmp_dir(&p);
|
||||
if (r < 0)
|
||||
return r;
|
||||
|
||||
if (root)
|
||||
p = "/var/tmp";
|
||||
else {
|
||||
r = var_tmp_dir(&p);
|
||||
if (r < 0)
|
||||
return r;
|
||||
}
|
||||
copy = strdup(p);
|
||||
if (!copy)
|
||||
return -ENOMEM;
|
||||
|
||||
+23
-23
@@ -3,7 +3,7 @@
|
||||
|
||||
#include "string-util.h"
|
||||
|
||||
typedef int (*SpecifierCallback)(char specifier, const void *data, const void *userdata, char **ret);
|
||||
typedef int (*SpecifierCallback)(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
|
||||
typedef struct Specifier {
|
||||
const char specifier;
|
||||
@@ -11,32 +11,32 @@ typedef struct Specifier {
|
||||
const void *data;
|
||||
} Specifier;
|
||||
|
||||
int specifier_printf(const char *text, size_t max_length, const Specifier table[], const void *userdata, char **ret);
|
||||
int specifier_printf(const char *text, size_t max_length, const Specifier table[], const char *root, const void *userdata, char **ret);
|
||||
|
||||
int specifier_string(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_string(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
|
||||
int specifier_machine_id(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_boot_id(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_host_name(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_short_host_name(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_kernel_release(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_architecture(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_os_id(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_os_version_id(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_os_build_id(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_os_variant_id(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_os_image_id(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_os_image_version(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_machine_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_boot_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_host_name(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_short_host_name(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_kernel_release(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_architecture(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_os_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_os_version_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_os_build_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_os_variant_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_os_image_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_os_image_version(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
|
||||
int specifier_group_name(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_group_id(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_user_name(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_user_id(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_user_home(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_user_shell(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_group_name(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_group_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_user_name(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_user_id(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_user_home(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_user_shell(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
|
||||
int specifier_tmp_dir(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_var_tmp_dir(char specifier, const void *data, const void *userdata, char **ret);
|
||||
int specifier_tmp_dir(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
int specifier_var_tmp_dir(char specifier, const void *data, const char *root, const void *userdata, char **ret);
|
||||
|
||||
/* Typically, in places where one of the above specifier is to be resolved the other similar ones are to be
|
||||
* resolved, too. Hence let's define common macros for the relevant array entries.
|
||||
|
||||
Reference in New Issue
Block a user