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/* Copyright (C) 2020 June McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* Additional permission under GNU GPL version 3 section 7:
*
* If you modify this Program, or any covered work, by linking or
* combining it with OpenSSL (or a modified version of that library),
* containing parts covered by the terms of the OpenSSL License and the
* original SSLeay license, the licensors of this Program grant you
* additional permission to convey the resulting work. Corresponding
* Source for a non-source form of such a combination shall include the
* source code for the parts of OpenSSL used as well as that of the
* covered work.
*/
#include <assert.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sysexits.h>
#include <time.h>
#include <unistd.h>
#ifdef __FreeBSD__
#include <capsicum_helpers.h>
#endif
#include "chat.h"
static int logDir = -1;
void logOpen(void) {
char buf[PATH_MAX];
int error = mkdir(dataPath(buf, sizeof(buf), "", 0), S_IRWXU);
if (error && errno != EEXIST) err(EX_CANTCREAT, "%s", buf);
error = mkdir(dataPath(buf, sizeof(buf), "log", 0), S_IRWXU);
if (error && errno != EEXIST) err(EX_CANTCREAT, "%s", buf);
logDir = open(buf, O_RDONLY | O_CLOEXEC);
if (logDir < 0) err(EX_CANTCREAT, "%s", buf);
#ifdef __FreeBSD__
cap_rights_t rights;
cap_rights_init(
&rights, CAP_MKDIRAT, CAP_CREATE, CAP_WRITE,
/* for fdopen(3) */ CAP_FCNTL, CAP_FSTAT
);
error = caph_rights_limit(logDir, &rights);
if (error) err(EX_OSERR, "cap_rights_limit");
#endif
}
static void logMkdir(const char *path) {
int error = mkdirat(logDir, path, S_IRWXU);
if (error && errno != EEXIST) err(EX_CANTCREAT, "log/%s", path);
}
static void sanitize(char *ptr, char *end) {
for (char *ch = ptr; ch < end && *ch == '.'; ++ch) {
*ch = '_';
}
for (char *ch = ptr; ch < end; ++ch) {
if (*ch == '/') *ch = '_';
}
}
static struct {
int year;
int month;
int day;
FILE *file;
} logs[IDCap];
static FILE *logFile(uint id, const struct tm *tm) {
if (
logs[id].file &&
logs[id].year == tm->tm_year &&
logs[id].month == tm->tm_mon &&
logs[id].day == tm->tm_mday
) return logs[id].file;
if (logs[id].file) {
int error = fclose(logs[id].file);
if (error) err(EX_IOERR, "%s", idNames[id]);
}
logs[id].year = tm->tm_year;
logs[id].month = tm->tm_mon;
logs[id].day = tm->tm_mday;
char path[PATH_MAX];
char *ptr = path, *end = &path[sizeof(path)];
ptr = seprintf(ptr, end, "%s", network.name);
sanitize(path, ptr);
logMkdir(path);
char *name = ptr;
ptr = seprintf(ptr, end, "/%s", idNames[id]);
sanitize(&name[1], ptr);
logMkdir(path);
size_t len = strftime(ptr, end - ptr, "/%F.log", tm);
if (!len) errx(EX_CANTCREAT, "log path too long");
int fd = openat(
logDir, path,
O_WRONLY | O_APPEND | O_CREAT | O_CLOEXEC,
S_IRUSR | S_IWUSR
);
if (fd < 0) err(EX_CANTCREAT, "log/%s", path);
logs[id].file = fdopen(fd, "a");
if (!logs[id].file) err(EX_OSERR, "fdopen");
setlinebuf(logs[id].file);
return logs[id].file;
}
void logClose(void) {
if (logDir < 0) return;
for (uint id = 0; id < IDCap; ++id) {
if (!logs[id].file) continue;
int error = fclose(logs[id].file);
if (error) err(EX_IOERR, "%s", idNames[id]);
}
close(logDir);
}
void logFormat(uint id, const time_t *src, const char *format, ...) {
if (logDir < 0) return;
time_t ts = (src ? *src : time(NULL));
struct tm *tm = localtime(&ts);
if (!tm) err(EX_OSERR, "localtime");
FILE *file = logFile(id, tm);
char buf[sizeof("0000-00-00T00:00:00+0000")];
strftime(buf, sizeof(buf), "%FT%T%z", tm);
int n = fprintf(file, "[%s] ", buf);
if (n < 0) err(EX_IOERR, "%s", idNames[id]);
va_list ap;
va_start(ap, format);
n = vfprintf(file, format, ap);
va_end(ap);
if (n < 0) err(EX_IOERR, "%s", idNames[id]);
n = fprintf(file, "\n");
if (n < 0) err(EX_IOERR, "%s", idNames[id]);
}
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