diff options
Diffstat (limited to 'log.c')
| -rw-r--r-- | log.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/log.c b/log.c new file mode 100644 index 0000000..2a47806 --- /dev/null +++ b/log.c @@ -0,0 +1,121 @@ +/* Copyright (C) 2018 Curtis McEnroe <june@causal.agency> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/stat.h> +#include <sysexits.h> +#include <time.h> + +#include "chat.h" + +static int logRoot = -1; + +static struct Log { + int dir; + int year; + int month; + int day; + FILE *file; +} logs[TAGS_LEN]; + +void logOpen(const char *path) { + logRoot = open(path, O_RDONLY | O_CLOEXEC); + if (logRoot < 0) err(EX_CANTCREAT, "%s", path); +} + +static void sanitize(char *name) { + for (; name[0]; ++name) { + if (name[0] == '/') name[0] = '_'; + } +} + +static FILE *logFile(struct Tag tag, const struct tm *time) { + struct Log *log = &logs[tag.id]; + if ( + log->file + && log->year == time->tm_year + && log->month == time->tm_mon + && log->day == time->tm_mday + ) return log->file; + + if (log->file) { + fclose(log->file); + + } else { + char *name = strdup(tag.name); + if (!name) err(EX_OSERR, "strdup"); + sanitize(name); + + int error = mkdirat(logRoot, name, 0700); + if (error && errno != EEXIST) err(EX_CANTCREAT, "%s", name); + + log->dir = openat(logRoot, name, O_RDONLY | O_CLOEXEC); + if (log->dir < 0) err(EX_CANTCREAT, "%s", name); + + free(name); + } + + log->year = time->tm_year; + log->month = time->tm_mon; + log->day = time->tm_mday; + + char path[sizeof("YYYY-MM-DD.log")]; + strftime(path, sizeof(path), "%F.log", time); + int fd = openat( + log->dir, path, O_WRONLY | O_APPEND | O_CREAT | O_CLOEXEC, 0700 + ); + if (fd < 0) err(EX_CANTCREAT, "%s/%s", tag.name, path); + + log->file = fdopen(fd, "a"); + if (!log->file) err(EX_CANTCREAT, "%s/%s", tag.name, path); + setlinebuf(log->file); + + return log->file; +} + +void logFmt(struct Tag tag, const time_t *ts, const char *format, ...) { + if (logRoot < 0) return; + + time_t t; + if (!ts) { + t = time(NULL); + ts = &t; + } + + struct tm *time = localtime(ts); + if (!time) err(EX_SOFTWARE, "localtime"); + + FILE *file = logFile(tag, time); + + char stamp[sizeof("YYYY-MM-DDThh:mm:ss+hhmm")]; + strftime(stamp, sizeof(stamp), "%FT%T%z", time); + fprintf(file, "[%s] ", stamp); + if (ferror(file)) err(EX_IOERR, "%s", tag.name); + + va_list ap; + va_start(ap, format); + vfprintf(file, format, ap); + va_end(ap); + if (ferror(file)) err(EX_IOERR, "%s", tag.name); + + fprintf(file, "\n"); + if (ferror(file)) err(EX_IOERR, "%s", tag.name); +} |