/* * log.c * * Copyright (c) 2006-2016 Pacman Development Team <pacman-dev@archlinux.org> * Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org> * * 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 2 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 <http://www.gnu.org/licenses/>. */ #include <stdio.h> #include <stdarg.h> #include <errno.h> #include <syslog.h> /* libalpm */ #include "log.h" #include "handle.h" #include "util.h" #include "alpm.h" /** \addtogroup alpm_log Logging Functions * @brief Functions to log using libalpm * @{ */ static int _alpm_log_leader(FILE *f, const char *prefix) { time_t t = time(NULL); struct tm *tm = localtime(&t); /* Use ISO-8601 date format */ return fprintf(f, "[%04d-%02d-%02d %02d:%02d] [%s] ", tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, prefix); } /** A printf-like function for logging. * @param handle the context handle * @param prefix caller-specific prefix for the log * @param fmt output format * @return 0 on success, -1 on error (pm_errno is set accordingly) */ int SYMEXPORT alpm_logaction(alpm_handle_t *handle, const char *prefix, const char *fmt, ...) { int ret = 0; va_list args; ASSERT(handle != NULL, return -1); if(!(prefix && *prefix)) { prefix = "UNKNOWN"; } /* check if the logstream is open already, opening it if needed */ if(handle->logstream == NULL && handle->logfile != NULL) { int fd; do { fd = open(handle->logfile, O_WRONLY | O_APPEND | O_CREAT | O_CLOEXEC, 0644); } while(fd == -1 && errno == EINTR); /* if we couldn't open it, we have an issue */ if(fd < 0 || (handle->logstream = fdopen(fd, "a")) == NULL) { if(errno == EACCES) { handle->pm_errno = ALPM_ERR_BADPERMS; } else if(errno == ENOENT) { handle->pm_errno = ALPM_ERR_NOT_A_DIR; } else { handle->pm_errno = ALPM_ERR_SYSTEM; } ret = -1; } } va_start(args, fmt); if(handle->usesyslog) { /* we can't use a va_list more than once, so we need to copy it * so we can use the original when calling vfprintf below. */ va_list args_syslog; va_copy(args_syslog, args); vsyslog(LOG_WARNING, fmt, args_syslog); va_end(args_syslog); } if(handle->logstream) { if(_alpm_log_leader(handle->logstream, prefix) < 0 || vfprintf(handle->logstream, fmt, args) < 0) { ret = -1; handle->pm_errno = ALPM_ERR_SYSTEM; } fflush(handle->logstream); } va_end(args); return ret; } /** @} */ void _alpm_log(alpm_handle_t *handle, alpm_loglevel_t flag, const char *fmt, ...) { va_list args; if(handle == NULL || handle->logcb == NULL) { return; } va_start(args, fmt); handle->logcb(flag, fmt, args); va_end(args); } /* vim: set noet: */