Adding upstream version 2.4.38.upstream/2.4.38

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 781 insertions, 0 deletions

diff --git a/support/rotatelogs.c b/support/rotatelogs.c
new file mode 100644
index 0000000..2526f56
--- /dev/null
+++ b/support/rotatelogs.c
@@ -0,0 +1,781 @@
+/* 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.
+ */
+
+#include "apr.h"
+#include "apr_lib.h"
+#include "apr_strings.h"
+#include "apr_errno.h"
+#include "apr_file_io.h"
+#include "apr_file_info.h"
+#include "apr_general.h"
+#include "apr_time.h"
+#include "apr_getopt.h"
+#include "apr_thread_proc.h"
+#include "apr_signal.h"
+#if APR_FILES_AS_SOCKETS
+#include "apr_poll.h"
+#endif
+
+#if APR_HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#define BUFSIZE         65536
+
+#define ROTATE_NONE     0
+#define ROTATE_NEW      1
+#define ROTATE_TIME     2
+#define ROTATE_SIZE     3
+#define ROTATE_FORCE    4
+
+static const char *const ROTATE_REASONS[] = {
+    "None",
+    "Open a new file",
+    "Time interval expired",
+    "Maximum size reached",
+    "Forced rotation",
+    NULL
+};
+
+typedef struct rotate_config rotate_config_t;
+
+struct rotate_config {
+    unsigned int sRotation;
+    int tRotation;
+    int utc_offset;
+    int use_localtime;
+    int use_strftime;
+    int force_open;
+    int verbose;
+    int echo;
+    char *szLogRoot;
+    int truncate;
+    const char *linkfile;
+    const char *postrotate_prog;
+#if APR_FILES_AS_SOCKETS
+    int create_empty;
+#endif
+    int num_files;
+    int create_path;
+};
+
+typedef struct rotate_status rotate_status_t;
+
+/* "adjusted_time_t" is used to store Unix time (seconds since epoch)
+ * which has been adjusted for some timezone fudge factor.  It should
+ * be used for storing the return values from get_now().  A typedef is
+ * used since this type is similar to time_t, but different. */
+typedef long adjusted_time_t;
+
+/* Structure to contain relevant logfile state: fd, pool and
+ * filename. */
+struct logfile {
+    apr_pool_t *pool;
+    apr_file_t *fd;
+    char name[APR_PATH_MAX];
+};
+
+struct rotate_status {
+    struct logfile current; /* current logfile. */
+    apr_pool_t *pool; /* top-level pool */
+    int rotateReason;
+    adjusted_time_t tLogEnd;
+    int nMessCount;
+    int fileNum;
+};
+
+static rotate_config_t config;
+static rotate_status_t status;
+
+static void usage(const char *argv0, const char *reason)
+{
+    if (reason) {
+        fprintf(stderr, "%s\n", reason);
+    }
+    fprintf(stderr,
+#if APR_FILES_AS_SOCKETS
+            "Usage: %s [-v] [-l] [-L linkname] [-p prog] [-f] [-D] [-t] [-e] [-c] [-n number] <logfile> "
+#else
+            "Usage: %s [-v] [-l] [-L linkname] [-p prog] [-f] [-D] [-t] [-e] [-n number] <logfile> "
+#endif
+            "{<rotation time in seconds>|<rotation size>(B|K|M|G)} "
+            "[offset minutes from UTC]\n\n",
+            argv0);
+#ifdef OS2
+    fprintf(stderr,
+            "Add this:\n\nTransferLog \"|%s.exe /some/where 86400\"\n\n",
+            argv0);
+#else
+    fprintf(stderr,
+            "Add this:\n\nTransferLog \"|%s /some/where 86400\"\n\n",
+            argv0);
+    fprintf(stderr,
+            "or \n\nTransferLog \"|%s /some/where 5M\"\n\n", argv0);
+#endif
+    fprintf(stderr,
+            "to httpd.conf. By default, the generated name will be\n"
+            "<logfile>.nnnn where nnnn is the system time at which the log\n"
+            "nominally starts (N.B. if using a rotation time, the time will\n"
+            "always be a multiple of the rotation time, so you can synchronize\n"
+            "cron scripts with it). If <logfile> contains strftime conversion\n"
+            "specifications, those will be used instead. At the end of each\n"
+            "rotation time or when the file size is reached a new log is\n"
+            "started.\n"
+            "\n"
+            "Options:\n"
+            "  -v       Verbose operation. Messages are written to stderr.\n"
+            "  -l       Base rotation on local time instead of UTC.\n"
+            "  -L path  Create hard link from current log to specified path.\n"
+            "  -p prog  Run specified program after opening a new log file. See below.\n"
+            "  -f       Force opening of log on program start.\n"
+            "  -D       Create parent directories of log file.\n" 
+            "  -t       Truncate logfile instead of rotating, tail friendly.\n"
+            "  -e       Echo log to stdout for further processing.\n"
+#if APR_FILES_AS_SOCKETS
+            "  -c       Create log even if it is empty.\n"
+#endif
+            "  -n num   Rotate file by adding suffixes '.1', '.2', ..., '.num'.\n"
+            "\n"
+            "The program for '-p' is invoked as \"[prog] <curfile> [<prevfile>]\"\n"
+            "where <curfile> is the filename of the newly opened logfile, and\n"
+            "<prevfile>, if given, is the filename of the previously used logfile.\n"
+            "\n");
+    exit(1);
+}
+
+/* This function returns the current Unix time (time_t) adjusted for
+ * any configured or derived local time offset.  The offset applied is
+ * returned via *offset. */
+static adjusted_time_t get_now(rotate_config_t *config, apr_int32_t *offset)
+{
+    apr_time_t tNow = apr_time_now();
+    apr_int32_t utc_offset;
+
+    if (config->use_localtime) {
+        /* Check for our UTC offset before using it, since it might
+         * change if there's a switch between standard and daylight
+         * savings time.
+         */
+        apr_time_exp_t lt;
+        apr_time_exp_lt(&lt, tNow);
+        utc_offset = lt.tm_gmtoff;
+    }
+    else {
+        utc_offset = config->utc_offset;
+    }
+
+    if (offset)
+        *offset = utc_offset;
+
+    return apr_time_sec(tNow) + utc_offset;
+}
+
+/*
+ * Close a file and destroy the associated pool.
+ */
+static void close_logfile(rotate_config_t *config, struct logfile *logfile)
+{
+    if (config->verbose) {
+        fprintf(stderr, "Closing file %s\n", logfile->name);
+    }
+    apr_file_close(logfile->fd);
+    apr_pool_destroy(logfile->pool);
+}
+
+/*
+ * Dump the configuration parsing result to STDERR.
+ */
+static void dumpConfig (rotate_config_t *config)
+{
+    fprintf(stderr, "Rotation time interval:      %12d\n", config->tRotation);
+    fprintf(stderr, "Rotation size interval:      %12d\n", config->sRotation);
+    fprintf(stderr, "Rotation time UTC offset:    %12d\n", config->utc_offset);
+    fprintf(stderr, "Rotation based on localtime: %12s\n", config->use_localtime ? "yes" : "no");
+    fprintf(stderr, "Rotation file date pattern:  %12s\n", config->use_strftime ? "yes" : "no");
+    fprintf(stderr, "Rotation file forced open:   %12s\n", config->force_open ? "yes" : "no");
+    fprintf(stderr, "Create parent directories:   %12s\n", config->create_path ? "yes" : "no");
+    fprintf(stderr, "Rotation verbose:            %12s\n", config->verbose ? "yes" : "no");
+#if APR_FILES_AS_SOCKETS
+    fprintf(stderr, "Rotation create empty logs:  %12s\n", config->create_empty ? "yes" : "no");
+#endif
+    fprintf(stderr, "Rotation file name: %21s\n", config->szLogRoot);
+    fprintf(stderr, "Post-rotation prog: %21s\n", config->postrotate_prog ? config->postrotate_prog : "not used");
+}
+
+/*
+ * Check whether we need to rotate.
+ * Possible reasons are:
+ * - No log file open (ROTATE_NEW)
+ * - User forces us to rotate (ROTATE_FORCE)
+ * - Our log file size is already bigger than the
+ *   allowed maximum (ROTATE_SIZE)
+ * - The next log time interval expired (ROTATE_TIME)
+ *
+ * When size and time constraints are both given,
+ * it suffices that one of them is fulfilled.
+ */
+static void checkRotate(rotate_config_t *config, rotate_status_t *status)
+{
+    if (status->current.fd == NULL) {
+        status->rotateReason = ROTATE_NEW;
+    }
+    else if (config->sRotation) {
+        apr_finfo_t finfo;
+        apr_off_t current_size = -1;
+
+        if (apr_file_info_get(&finfo, APR_FINFO_SIZE, status->current.fd) == APR_SUCCESS) {
+            current_size = finfo.size;
+        }
+
+        if (current_size > config->sRotation) {
+            status->rotateReason = ROTATE_SIZE;
+        }
+        else if (config->tRotation) {
+            if (get_now(config, NULL) >= status->tLogEnd) {
+                status->rotateReason = ROTATE_TIME;
+            }
+        }
+    }
+    else if (config->tRotation) {
+        if (get_now(config, NULL) >= status->tLogEnd) {
+            status->rotateReason = ROTATE_TIME;
+        }
+    }
+    else {
+        fprintf(stderr, "No rotation time or size specified\n");
+        exit(2);
+    }
+
+    if (status->rotateReason != ROTATE_NONE && config->verbose) {
+        fprintf(stderr, "File rotation needed, reason: %s\n", ROTATE_REASONS[status->rotateReason]);
+    }
+}
+
+/*
+ * Handle post-rotate processing.
+ */
+static void post_rotate(apr_pool_t *pool, struct logfile *newlog,
+                        rotate_config_t *config, rotate_status_t *status)
+{
+    apr_status_t rv;
+    char error[120];
+    apr_procattr_t *pattr;
+    const char *argv[4];
+    apr_proc_t proc;
+
+    /* Handle link file, if configured. */
+    if (config->linkfile) {
+        apr_file_remove(config->linkfile, newlog->pool);
+        if (config->verbose) {
+            fprintf(stderr, "Linking %s to %s\n", newlog->name, config->linkfile);
+        }
+        rv = apr_file_link(newlog->name, config->linkfile);
+        if (rv != APR_SUCCESS) {
+            apr_strerror(rv, error, sizeof error);
+            fprintf(stderr, "Error linking file %s to %s (%s)\n",
+                    newlog->name, config->linkfile, error);
+            exit(2);
+        }
+    }
+
+    if (!config->postrotate_prog) {
+        /* Nothing more to do. */
+        return;
+    }
+
+    /* Collect any zombies from a previous run, but don't wait. */
+    while (apr_proc_wait_all_procs(&proc, NULL, NULL, APR_NOWAIT, pool) == APR_CHILD_DONE)
+        /* noop */;
+
+    if ((rv = apr_procattr_create(&pattr, pool)) != APR_SUCCESS) {
+        fprintf(stderr,
+                "post_rotate: apr_procattr_create failed for '%s': %s\n",
+                config->postrotate_prog,
+                apr_strerror(rv, error, sizeof(error)));
+        return;
+    }
+
+    rv = apr_procattr_error_check_set(pattr, 1);
+    if (rv == APR_SUCCESS)
+        rv = apr_procattr_cmdtype_set(pattr, APR_PROGRAM_ENV);
+
+    if (rv != APR_SUCCESS) {
+        fprintf(stderr,
+                "post_rotate: could not set up process attributes for '%s': %s\n",
+                config->postrotate_prog,
+                apr_strerror(rv, error, sizeof(error)));
+        return;
+    }
+
+    argv[0] = config->postrotate_prog;
+    argv[1] = newlog->name;
+    if (status->current.fd) {
+        argv[2] = status->current.name;
+        argv[3] = NULL;
+    }
+    else {
+        argv[2] = NULL;
+    }
+
+    if (config->verbose)
+        fprintf(stderr, "Calling post-rotate program: %s\n", argv[0]);
+
+    rv = apr_proc_create(&proc, argv[0], argv, NULL, pattr, pool);
+    if (rv != APR_SUCCESS) {
+        fprintf(stderr, "Could not spawn post-rotate process '%s': %s\n",
+                config->postrotate_prog,
+                apr_strerror(rv, error, sizeof(error)));
+        return;
+    }
+}
+
+/* After a error, truncate the current file and write out an error
+ * message, which must be contained in message.  The process is
+ * terminated on failure.  */
+static void truncate_and_write_error(rotate_status_t *status, const char *message)
+{
+    apr_size_t buflen = strlen(message);
+
+    if (apr_file_trunc(status->current.fd, 0) != APR_SUCCESS) {
+        fprintf(stderr, "Error truncating the file %s\n", status->current.name);
+        exit(2);
+    }
+    if (apr_file_write_full(status->current.fd, message, buflen, NULL) != APR_SUCCESS) {
+        fprintf(stderr, "Error writing error (%s) to the file %s\n", 
+                message, status->current.name);
+        exit(2);
+    }
+}
+
+/*
+ * Open a new log file, and if successful
+ * also close the old one.
+ *
+ * The timestamp for the calculation of the file
+ * name of the new log file will be the actual millisecond
+ * timestamp, except when a regular rotation based on a time
+ * interval is configured and the previous interval
+ * is over. Then the timestamp is the starting time
+ * of the actual interval.
+ */
+static void doRotate(rotate_config_t *config, rotate_status_t *status)
+{
+    apr_int32_t offset;
+    adjusted_time_t now, tLogStart;
+    apr_status_t rv;
+    struct logfile newlog;
+    int thisLogNum = -1;
+
+    /* Retrieve local-time-adjusted-Unix-time. */
+    now = get_now(config, &offset);
+
+    status->rotateReason = ROTATE_NONE;
+
+    if (config->tRotation) {
+        adjusted_time_t tLogEnd;
+
+        tLogStart = (now / config->tRotation) * config->tRotation;
+        tLogEnd = tLogStart + config->tRotation;
+        /*
+         * Check if rotation was forced and the last rotation
+         * interval is not yet over. Use the value of now instead
+         * of the time interval boundary for the file name then.
+         */
+        if (tLogStart < status->tLogEnd) {
+            tLogStart = now;
+        }
+        status->tLogEnd = tLogEnd;
+    }
+    else {
+        tLogStart = now;
+    }
+
+    if (config->use_strftime) {
+        apr_time_t tNow = apr_time_from_sec(tLogStart);
+        apr_time_exp_t e;
+        apr_size_t rs;
+
+        /* Explode the local-time-adjusted-Unix-time into a struct tm,
+         * first *reversing* local-time-adjustment applied by
+         * get_now() if we are using localtime. */
+        if (config->use_localtime)
+            apr_time_exp_lt(&e, tNow - apr_time_from_sec(offset));
+        else
+            apr_time_exp_gmt(&e, tNow);
+        apr_strftime(newlog.name, &rs, sizeof(newlog.name), config->szLogRoot, &e);
+    }
+    else {
+        if (config->truncate) {
+            apr_snprintf(newlog.name, sizeof(newlog.name), "%s", config->szLogRoot);
+        }
+        else if (config->num_files > 0) { 
+            if (status->fileNum == -1 || status->fileNum == (config->num_files - 1)) {
+                thisLogNum = 0;
+                apr_snprintf(newlog.name, sizeof(newlog.name), "%s", config->szLogRoot);
+            }
+            else { 
+                thisLogNum = status->fileNum + 1;
+                apr_snprintf(newlog.name, sizeof(newlog.name), "%s.%d", config->szLogRoot, thisLogNum);
+            }
+        }
+        else {
+            apr_snprintf(newlog.name, sizeof(newlog.name), "%s.%010ld", config->szLogRoot,
+                         tLogStart);
+        }
+    }
+    apr_pool_create(&newlog.pool, status->pool);
+    if (config->create_path) {
+        char *ptr = strrchr(newlog.name, '/');
+        if (ptr && ptr > newlog.name) {
+            char *path = apr_pstrmemdup(newlog.pool, newlog.name, ptr - newlog.name);
+            if (config->verbose) {
+                fprintf(stderr, "Creating directory tree %s\n", path);
+            }
+            rv = apr_dir_make_recursive(path, APR_FPROT_OS_DEFAULT, newlog.pool);
+            if (rv != APR_SUCCESS) {
+                char error[120];
+
+                apr_strerror(rv, error, sizeof error);
+                fprintf(stderr, "Could not create directory '%s' (%s)\n", path, error);
+                exit(2);
+            }
+        }
+    }
+    if (config->verbose) {
+        fprintf(stderr, "Opening file %s\n", newlog.name);
+    }
+    rv = apr_file_open(&newlog.fd, newlog.name, APR_WRITE | APR_CREATE | APR_APPEND
+                       | (config->truncate || (config->num_files > 0 && status->current.fd) ? APR_TRUNCATE : 0), 
+                       APR_OS_DEFAULT, newlog.pool);
+    if (rv == APR_SUCCESS) {
+        /* Handle post-rotate processing. */
+        post_rotate(newlog.pool, &newlog, config, status);
+
+        status->fileNum = thisLogNum;
+        /* Close out old (previously 'current') logfile, if any. */
+        if (status->current.fd) {
+            close_logfile(config, &status->current);
+        }
+
+        /* New log file is now 'current'. */
+        status->current = newlog;
+    }
+    else {
+        char *error = apr_psprintf(newlog.pool, "%pm", &rv);
+        char *message;
+
+        /* Uh-oh. Failed to open the new log file. Try to clear
+         * the previous log file, note the lost log entries,
+         * and keep on truckin'. */
+        if (status->current.fd == NULL) {
+            fprintf(stderr, "Could not open log file '%s' (%s)\n", newlog.name, error);
+            exit(2);
+        }
+
+        /* Try to keep this error message constant length
+         * in case it occurs several times. */
+        message = apr_psprintf(newlog.pool,
+                               "Resetting log file due to error opening "
+                               "new log file, %10d messages lost: %-25.25s\n",
+                               status->nMessCount, error);
+
+        truncate_and_write_error(status, message);
+
+        /* Throw away new state; it isn't going to be used. */
+        apr_pool_destroy(newlog.pool);
+    }
+
+    status->nMessCount = 0;
+}
+
+/*
+ * Get a size or time param from a string.
+ * Parameter 'last' indicates, whether the
+ * argument is the last commadnline argument.
+ * UTC offset is only allowed as a last argument
+ * in order to make is distinguishable from the
+ * rotation interval time.
+ */
+static const char *get_time_or_size(rotate_config_t *config,
+                                    const char *arg, int last) {
+    char *ptr = NULL;
+    /* Byte multiplier */
+    unsigned int mult = 1;
+    if ((ptr = strchr(arg, 'B')) != NULL) { /* Found KB size */
+        mult = 1;
+    }
+    else if ((ptr = strchr(arg, 'K')) != NULL) { /* Found KB size */
+        mult = 1024;
+    }
+    else if ((ptr = strchr(arg, 'M')) != NULL) { /* Found MB size */
+        mult = 1024 * 1024;
+    }
+    else if ((ptr = strchr(arg, 'G')) != NULL) { /* Found GB size */
+        mult = 1024 * 1024 * 1024;
+    }
+    if (ptr) { /* rotation based on file size */
+        if (config->sRotation > 0) {
+            return "Rotation size parameter allowed only once";
+        }
+        if (*(ptr+1) == '\0') {
+            config->sRotation = atoi(arg) * mult;
+        }
+        if (config->sRotation == 0) {
+            return "Invalid rotation size parameter";
+        }
+    }
+    else if ((config->sRotation > 0 || config->tRotation > 0) && last) {
+        /* rotation based on elapsed time */
+        if (config->use_localtime) {
+            return "UTC offset parameter is not valid with -l";
+        }
+        config->utc_offset = atoi(arg) * 60;
+    }
+    else { /* rotation based on elapsed time */
+        if (config->tRotation > 0) {
+            return "Rotation time parameter allowed only once";
+        }
+        config->tRotation = atoi(arg);
+        if (config->tRotation <= 0) {
+            return "Invalid rotation time parameter";
+        }
+    }
+    return NULL;
+}
+
+int main (int argc, const char * const argv[])
+{
+    char buf[BUFSIZE];
+    apr_size_t nRead, nWrite;
+    apr_file_t *f_stdin;
+    apr_file_t *f_stdout;
+    apr_getopt_t *opt;
+    apr_status_t rv;
+    char c;
+    const char *opt_arg;
+    const char *err = NULL;
+#if APR_FILES_AS_SOCKETS
+    apr_pollfd_t pollfd = { 0 };
+    apr_status_t pollret = APR_SUCCESS;
+    long polltimeout;
+#endif
+
+    apr_app_initialize(&argc, &argv, NULL);
+    atexit(apr_terminate);
+
+    memset(&config, 0, sizeof config);
+    memset(&status, 0, sizeof status);
+    status.rotateReason = ROTATE_NONE;
+
+    apr_pool_create(&status.pool, NULL);
+    apr_getopt_init(&opt, status.pool, argc, argv);
+#if APR_FILES_AS_SOCKETS
+    while ((rv = apr_getopt(opt, "lL:p:fDtvecn:", &c, &opt_arg)) == APR_SUCCESS) {
+#else
+    while ((rv = apr_getopt(opt, "lL:p:fDtven:", &c, &opt_arg)) == APR_SUCCESS) {
+#endif
+        switch (c) {
+        case 'l':
+            config.use_localtime = 1;
+            break;
+        case 'L':
+            config.linkfile = opt_arg;
+            break;
+        case 'p':
+            config.postrotate_prog = opt_arg;
+#ifdef SIGCHLD
+            /* Prevent creation of zombies (on modern Unix systems). */
+            apr_signal(SIGCHLD, SIG_IGN);
+#endif
+            break;
+        case 'f':
+            config.force_open = 1;
+            break;
+        case 'D':
+            config.create_path = 1;
+            break;
+        case 't':
+            config.truncate = 1;
+            break;
+        case 'v':
+            config.verbose = 1;
+            break;
+        case 'e':
+            config.echo = 1;
+            break;
+#if APR_FILES_AS_SOCKETS
+        case 'c':
+            config.create_empty = 1;
+            break;
+#endif
+        case 'n':
+            config.num_files = atoi(opt_arg);
+            status.fileNum = -1;
+            break;
+        }
+    }
+
+    if (rv != APR_EOF) {
+        usage(argv[0], NULL /* specific error message already issued */ );
+    }
+
+    /*
+     * After the initial flags we need 2 to 4 arguments,
+     * the file name, either the rotation interval time or size
+     * or both of them, and optionally the UTC offset.
+     */
+    if ((argc - opt->ind < 2) || (argc - opt->ind > 4) ) {
+        usage(argv[0], "Incorrect number of arguments");
+    }
+
+    rv = apr_filepath_merge(&config.szLogRoot, "", argv[opt->ind++],
+                            APR_FILEPATH_TRUENAME, status.pool);
+    if (rv != APR_SUCCESS && rv != APR_EPATHWILD) {
+        usage(argv[0], "Invalid filename given");
+    }
+
+    /* Read in the remaining flags, namely time, size and UTC offset. */
+    for(; opt->ind < argc; opt->ind++) {
+        if ((err = get_time_or_size(&config, argv[opt->ind],
+                                    opt->ind < argc - 1 ? 0 : 1)) != NULL) {
+            usage(argv[0], err);
+        }
+    }
+
+    config.use_strftime = (strchr(config.szLogRoot, '%') != NULL);
+
+    if (config.use_strftime && config.num_files > 0) { 
+        fprintf(stderr, "Cannot use -n with %% in filename\n");
+        exit(1);
+    }
+
+    if (status.fileNum == -1 && config.num_files < 1) { 
+        fprintf(stderr, "Invalid -n argument\n");
+        exit(1);
+    }
+
+    if (apr_file_open_stdin(&f_stdin, status.pool) != APR_SUCCESS) {
+        fprintf(stderr, "Unable to open stdin\n");
+        exit(1);
+    }
+
+    if (apr_file_open_stdout(&f_stdout, status.pool) != APR_SUCCESS) {
+        fprintf(stderr, "Unable to open stdout\n");
+        exit(1);
+    }
+
+    /*
+     * Write out result of config parsing if verbose is set.
+     */
+    if (config.verbose) {
+        dumpConfig(&config);
+    }
+
+#if APR_FILES_AS_SOCKETS
+    if (config.create_empty && config.tRotation) {
+        pollfd.p = status.pool;
+        pollfd.desc_type = APR_POLL_FILE;
+        pollfd.reqevents = APR_POLLIN;
+        pollfd.desc.f = f_stdin;
+    }
+#endif
+
+    /*
+     * Immediately open the logfile as we start, if we were forced
+     * to do so via '-f'.
+     */
+    if (config.force_open) {
+        doRotate(&config, &status);
+    }
+
+    for (;;) {
+        nRead = sizeof(buf);
+#if APR_FILES_AS_SOCKETS
+        if (config.create_empty && config.tRotation) {
+            polltimeout = status.tLogEnd ? status.tLogEnd - get_now(&config, NULL) : config.tRotation;
+            if (polltimeout <= 0) {
+                pollret = APR_TIMEUP;
+            }
+            else {
+                pollret = apr_poll(&pollfd, 1, &pollret, apr_time_from_sec(polltimeout));
+            }
+        }
+        if (pollret == APR_SUCCESS) {
+            rv = apr_file_read(f_stdin, buf, &nRead);
+            if (APR_STATUS_IS_EOF(rv)) {
+                break;
+            }
+            else if (rv != APR_SUCCESS) {
+                exit(3);
+            }
+        }
+        else if (pollret == APR_TIMEUP) {
+            *buf = 0;
+            nRead = 0;
+        }
+        else {
+            fprintf(stderr, "Unable to poll stdin\n");
+            exit(5);
+        }
+#else /* APR_FILES_AS_SOCKETS */
+        rv = apr_file_read(f_stdin, buf, &nRead);
+        if (APR_STATUS_IS_EOF(rv)) {
+            break;
+        }
+        else if (rv != APR_SUCCESS) {
+            exit(3);
+        }
+#endif /* APR_FILES_AS_SOCKETS */
+        checkRotate(&config, &status);
+        if (status.rotateReason != ROTATE_NONE) {
+            doRotate(&config, &status);
+        }
+
+        nWrite = nRead;
+        rv = apr_file_write_full(status.current.fd, buf, nWrite, &nWrite);
+        if (nWrite != nRead) {
+            apr_off_t cur_offset;
+            apr_pool_t *pool;
+            char *error;
+
+            cur_offset = 0;
+            if (apr_file_seek(status.current.fd, APR_CUR, &cur_offset) != APR_SUCCESS) {
+                cur_offset = -1;
+            }
+            status.nMessCount++;
+            apr_pool_create(&pool, status.pool);
+            error = apr_psprintf(pool, "Error %d writing to log file at offset %"
+                                 APR_OFF_T_FMT ". %10d messages lost (%pm)\n",
+                                 rv, cur_offset, status.nMessCount, &rv);
+
+            truncate_and_write_error(&status, error);
+            apr_pool_destroy(pool);
+        }
+        else {
+            status.nMessCount++;
+        }
+        if (config.echo) {
+            if (apr_file_write_full(f_stdout, buf, nRead, &nWrite)) {
+                fprintf(stderr, "Unable to write to stdout\n");
+                exit(4);
+            }
+        }
+    }
+
+    return 0; /* reached only at stdin EOF. */
+}