src/analyze/analyze-condition.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <stdlib.h>
   4
   5 #include "analyze-condition.h"
   6 #include "condition.h"
   7 #include "conf-parser.h"
   8 #include "load-fragment.h"
   9 #include "service.h"
  10
  11 typedef struct condition_definition {
  12         const char *name;
  13         ConfigParserCallback parser;
  14         ConditionType type;
  15 } condition_definition;
  16
  17 static const condition_definition condition_definitions[] = {
  18         { "ConditionPathExists",             config_parse_unit_condition_path,   CONDITION_PATH_EXISTS              },
  19         { "ConditionPathExistsGlob",         config_parse_unit_condition_path,   CONDITION_PATH_EXISTS_GLOB         },
  20         { "ConditionPathIsDirectory",        config_parse_unit_condition_path,   CONDITION_PATH_IS_DIRECTORY        },
  21         { "ConditionPathIsSymbolicLink",     config_parse_unit_condition_path,   CONDITION_PATH_IS_SYMBOLIC_LINK    },
  22         { "ConditionPathIsMountPoint",       config_parse_unit_condition_path,   CONDITION_PATH_IS_MOUNT_POINT      },
  23         { "ConditionPathIsReadWrite",        config_parse_unit_condition_path,   CONDITION_PATH_IS_READ_WRITE       },
  24         { "ConditionDirectoryNotEmpty",      config_parse_unit_condition_path,   CONDITION_DIRECTORY_NOT_EMPTY      },
  25         { "ConditionFileNotEmpty",           config_parse_unit_condition_path,   CONDITION_FILE_NOT_EMPTY           },
  26         { "ConditionFileIsExecutable",       config_parse_unit_condition_path,   CONDITION_FILE_IS_EXECUTABLE       },
  27         { "ConditionNeedsUpdate",            config_parse_unit_condition_path,   CONDITION_NEEDS_UPDATE             },
  28         { "ConditionFirstBoot",              config_parse_unit_condition_string, CONDITION_FIRST_BOOT               },
  29         { "ConditionKernelCommandLine",      config_parse_unit_condition_string, CONDITION_KERNEL_COMMAND_LINE      },
  30         { "ConditionKernelVersion",          config_parse_unit_condition_string, CONDITION_KERNEL_VERSION           },
  31         { "ConditionArchitecture",           config_parse_unit_condition_string, CONDITION_ARCHITECTURE             },
  32         { "ConditionVirtualization",         config_parse_unit_condition_string, CONDITION_VIRTUALIZATION           },
  33         { "ConditionSecurity",               config_parse_unit_condition_string, CONDITION_SECURITY                 },
  34         { "ConditionCapability",             config_parse_unit_condition_string, CONDITION_CAPABILITY               },
  35         { "ConditionHost",                   config_parse_unit_condition_string, CONDITION_HOST                     },
  36         { "ConditionACPower",                config_parse_unit_condition_string, CONDITION_AC_POWER                 },
  37         { "ConditionUser",                   config_parse_unit_condition_string, CONDITION_USER                     },
  38         { "ConditionGroup",                  config_parse_unit_condition_string, CONDITION_GROUP                    },
  39         { "ConditionControlGroupController", config_parse_unit_condition_string, CONDITION_CONTROL_GROUP_CONTROLLER },
  40
  41         { "AssertPathExists",                config_parse_unit_condition_path,   CONDITION_PATH_EXISTS              },
  42         { "AssertPathExistsGlob",            config_parse_unit_condition_path,   CONDITION_PATH_EXISTS_GLOB         },
  43         { "AssertPathIsDirectory",           config_parse_unit_condition_path,   CONDITION_PATH_IS_DIRECTORY        },
  44         { "AssertPathIsSymbolicLink",        config_parse_unit_condition_path,   CONDITION_PATH_IS_SYMBOLIC_LINK    },
  45         { "AssertPathIsMountPoint",          config_parse_unit_condition_path,   CONDITION_PATH_IS_MOUNT_POINT      },
  46         { "AssertPathIsReadWrite",           config_parse_unit_condition_path,   CONDITION_PATH_IS_READ_WRITE       },
  47         { "AssertDirectoryNotEmpty",         config_parse_unit_condition_path,   CONDITION_DIRECTORY_NOT_EMPTY      },
  48         { "AssertFileNotEmpty",              config_parse_unit_condition_path,   CONDITION_FILE_NOT_EMPTY           },
  49         { "AssertFileIsExecutable",          config_parse_unit_condition_path,   CONDITION_FILE_IS_EXECUTABLE       },
  50         { "AssertNeedsUpdate",               config_parse_unit_condition_path,   CONDITION_NEEDS_UPDATE             },
  51         { "AssertFirstBoot",                 config_parse_unit_condition_string, CONDITION_FIRST_BOOT               },
  52         { "AssertKernelCommandLine",         config_parse_unit_condition_string, CONDITION_KERNEL_COMMAND_LINE      },
  53         { "AssertKernelVersion",             config_parse_unit_condition_string, CONDITION_KERNEL_VERSION           },
  54         { "AssertArchitecture",              config_parse_unit_condition_string, CONDITION_ARCHITECTURE             },
  55         { "AssertVirtualization",            config_parse_unit_condition_string, CONDITION_VIRTUALIZATION           },
  56         { "AssertSecurity",                  config_parse_unit_condition_string, CONDITION_SECURITY                 },
  57         { "AssertCapability",                config_parse_unit_condition_string, CONDITION_CAPABILITY               },
  58         { "AssertHost",                      config_parse_unit_condition_string, CONDITION_HOST                     },
  59         { "AssertACPower",                   config_parse_unit_condition_string, CONDITION_AC_POWER                 },
  60         { "AssertUser",                      config_parse_unit_condition_string, CONDITION_USER                     },
  61         { "AssertGroup",                     config_parse_unit_condition_string, CONDITION_GROUP                    },
  62         { "AssertControlGroupController",    config_parse_unit_condition_string, CONDITION_CONTROL_GROUP_CONTROLLER },
  63
  64         /* deprecated, but we should still parse them */
  65         { "ConditionNull",                   config_parse_unit_condition_null,   0                                  },
  66         { "AssertNull",                      config_parse_unit_condition_null,   0                                  },
  67 };
  68
  69 static int parse_condition(Unit *u, const char *line) {
  70         const char *p;
  71         Condition **target;
  72
  73         if ((p = startswith(line, "Condition")))
  74                 target = &u->conditions;
  75         else if ((p = startswith(line, "Assert")))
  76                 target = &u->asserts;
  77         else
  78                 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Cannot parse \"%s\".", line);
  79
  80         for (size_t i = 0; i < ELEMENTSOF(condition_definitions); i++) {
  81                 const condition_definition *c = &condition_definitions[i];
  82
  83                 p = startswith(line, c->name);
  84                 if (!p)
  85                         continue;
  86                 p += strspn(p, WHITESPACE);
  87                 if (*p != '=')
  88                         return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Expected \"=\" in \"%s\".", line);
  89
  90                 p += 1 + strspn(p + 1, WHITESPACE);
  91
  92                 return c->parser(NULL, "(stdin)", 0, NULL, 0, c->name, c->type, p, target, u);
  93         }
  94
  95         return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Cannot parse \"%s\".", line);
  96 }
  97
  98 _printf_(7, 8)
  99 static int log_helper(void *userdata, int level, int error, const char *file, int line, const char *func, const char *format, ...) {
 100         Unit *u = userdata;
 101         va_list ap;
 102         int r;
 103
 104         assert(u);
 105
 106         /* "upgrade" debug messages */
 107         level = MIN(LOG_INFO, level);
 108
 109         va_start(ap, format);
 110         r = log_object_internalv(level, error, file, line, func,
 111                                  NULL,
 112                                  u->id,
 113                                  NULL,
 114                                  NULL,
 115                                  format, ap);
 116         va_end(ap);
 117
 118         return r;
 119 }
 120
 121 int verify_conditions(char **lines, UnitFileScope scope) {
 122         _cleanup_(manager_freep) Manager *m = NULL;
 123         Unit *u;
 124         char **line;
 125         int r, q = 1;
 126
 127         r = manager_new(scope, MANAGER_TEST_RUN_MINIMAL, &m);
 128         if (r < 0)
 129                 return log_error_errno(r, "Failed to initialize manager: %m");
 130
 131         log_debug("Starting manager...");
 132         r = manager_startup(m, NULL, NULL);
 133         if (r < 0)
 134                 return r;
 135
 136         r = unit_new_for_name(m, sizeof(Service), "test.service", &u);
 137         if (r < 0)
 138                 return log_error_errno(r, "Failed to create test.service: %m");
 139
 140         STRV_FOREACH(line, lines) {
 141                 r = parse_condition(u, *line);
 142                 if (r < 0)
 143                         return r;
 144         }
 145
 146         r = condition_test_list(u->asserts, assert_type_to_string, log_helper, u);
 147         if (u->asserts)
 148                 log_notice("Asserts %s.", r > 0 ? "succeeded" : "failed");
 149
 150         q = condition_test_list(u->conditions, condition_type_to_string, log_helper, u);
 151         if (u->conditions)
 152                 log_notice("Conditions %s.", q > 0 ? "succeeded" : "failed");
 153
 154         return r > 0 && q > 0 ? 0 : -EIO;
 155 }