This file is indexed.

/usr/include/apache2/unixd.h is in apache2-dev 2.4.29-1ubuntu4.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
/* Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * @file  unixd.h
 * @brief common stuff that unix MPMs will want
 *
 * @addtogroup APACHE_OS_UNIX
 * @{
 */

#ifndef UNIXD_H
#define UNIXD_H

#include "httpd.h"
#include "http_config.h"
#include "scoreboard.h"
#include "ap_listen.h"
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#include "apr_hooks.h"
#include "apr_thread_proc.h"
#include "apr_proc_mutex.h"
#include "apr_global_mutex.h"

#include <pwd.h>
#include <grp.h>
#if APR_HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_IPC_H
#include <sys/ipc.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
    uid_t uid;
    gid_t gid;
    int userdir;
} ap_unix_identity_t;

AP_DECLARE_HOOK(ap_unix_identity_t *, get_suexec_identity,(const request_rec *r))


/* Default user name and group name. These may be specified as numbers by
 * placing a # before a number */

#ifndef DEFAULT_USER
#define DEFAULT_USER "#-1"
#endif
#ifndef DEFAULT_GROUP
#define DEFAULT_GROUP "#-1"
#endif

typedef struct {
    const char *user_name;
    const char *group_name;
    uid_t user_id;
    gid_t group_id;
    int suexec_enabled;
    const char *chroot_dir;
    const char *suexec_disabled_reason; /* suitable msg if !suexec_enabled */
} unixd_config_rec;
AP_DECLARE_DATA extern unixd_config_rec ap_unixd_config;

#if defined(RLIMIT_CPU) || defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_NPROC) || defined(RLIMIT_AS)
AP_DECLARE(void) ap_unixd_set_rlimit(cmd_parms *cmd, struct rlimit **plimit,
                                     const char *arg,
                                     const char * arg2, int type);
#endif

/**
 * One of the functions to set mutex permissions should be called in
 * the parent process on platforms that switch identity when the
 * server is started as root.
 * If the child init logic is performed before switching identity
 * (e.g., MPM setup for an accept mutex), it should only be called
 * for SysV semaphores.  Otherwise, it is safe to call it for all
 * mutex types.
 */
AP_DECLARE(apr_status_t) ap_unixd_set_proc_mutex_perms(apr_proc_mutex_t *pmutex);
AP_DECLARE(apr_status_t) ap_unixd_set_global_mutex_perms(apr_global_mutex_t *gmutex);
AP_DECLARE(apr_status_t) ap_unixd_accept(void **accepted, ap_listen_rec *lr, apr_pool_t *ptrans);

#ifdef HAVE_KILLPG
#define ap_unixd_killpg(x, y)   (killpg ((x), (y)))
#define ap_os_killpg(x, y)      (killpg ((x), (y)))
#else /* HAVE_KILLPG */
#define ap_unixd_killpg(x, y)   (kill (-(x), (y)))
#define ap_os_killpg(x, y)      (kill (-(x), (y)))
#endif /* HAVE_KILLPG */

typedef struct {
    void            *baton;  /* MPM's */

    /* volatile because they're updated from signals' handlers */
    int volatile    mpm_state;
    int volatile    shutdown_pending;
    int volatile    restart_pending;
    int volatile    is_ungraceful;

    ap_generation_t my_generation;
    int             module_loads;
    int             was_graceful;

    /*
     * Current number of listeners buckets and maximum reached across
     * restarts (to size retained data according to dynamic num_buckets,
     * eg. idle_spawn_rate).
     */
    int num_buckets, max_buckets;
} ap_unixd_mpm_retained_data;

AP_DECLARE(ap_unixd_mpm_retained_data *) ap_unixd_mpm_get_retained_data(void);
AP_DECLARE(void) ap_unixd_mpm_set_signals(apr_pool_t *pconf, int once_process);

#ifdef __cplusplus
}
#endif

#endif
/** @} */