2 * Implementation of logging facilities.
4 * Europagate, 1994-1995.
7 * Revision 1.8 1995/04/17 09:36:16 adam
10 * Revision 1.7 1995/04/10 13:20:25 adam
11 * Use gettimeofday(2) instead of time(2) to get log time in milliseconds.
13 * Revision 1.6 1995/03/28 08:01:51 adam
14 * Bug fix: GW_LOG_ERRNO.
16 * Revision 1.5 1995/03/27 12:51:10 adam
17 * New log level in use: GW_LOG_ERRNO.
19 * Revision 1.4 1995/02/23 08:32:22 adam
22 * Revision 1.2 1995/02/17 17:06:56 adam
23 * Remove everything before '/' in app_name. Use compact date format.
25 * Revision 1.1.1.1 1995/02/09 17:27:12 adam
26 * Initial version of email gateway under CVS control.
28 * Initial: Dec 7, 94 (Adam Dickmeiss)
43 static char *app_name = NULL;
44 static unsigned level = GW_LOG_DEFAULT;
45 static int session = 0;
48 unsigned mask; /* level mask for this file entry */
49 int fd; /* file descriptor for this file */
50 char *fname; /* name of file ("" if stdout) */
51 struct file_mask *next; /* next file in chain */
54 struct file_mask *file_mask_list = NULL;
56 char *gw_strdup (const char *s)
58 char *n = malloc (strlen(s)+1);
64 void gw_log_init (const char *app_name_a)
66 struct file_mask *list, *list1;
69 if ((cp = strrchr (app_name_a, '/')))
70 app_name = gw_strdup (cp+1);
72 app_name = gw_strdup (app_name_a);
73 level = GW_LOG_DEFAULT;
76 /* clean up all output file masks... */
77 for (list = file_mask_list; list; list = list1)
79 if (list->fd > 2) /* avoid closing stdout/stderr */
85 file_mask_list = NULL;
88 void gw_log_level (unsigned level_a)
93 void gw_log_session (int session_a)
98 int gw_log_file (unsigned level_a, const char *fname_a)
100 struct file_mask **listp, *new_file_mask;
101 listp = &file_mask_list;
103 /* go through file mask list and close files already associated */
107 if (!((*listp)->mask &= ~level_a)) /* any levels left on this one? */
109 if ((*listp)->fd > 2) /* close if not stdout/stderr */
110 close ((*listp)->fd);
111 free ((*listp)->fname);
112 *listp = (*listp)->next;
114 listp = &(*listp)->next;
116 if (!fname_a) /* stderr? */
117 return 0; /* stderr doesn't appear on list */
118 new_file_mask = malloc (sizeof(*new_file_mask));
121 new_file_mask->mask = level_a;
122 new_file_mask->next = file_mask_list;
123 file_mask_list = new_file_mask;
124 if (!(file_mask_list->fname = gw_strdup (fname_a)))
126 if (*fname_a == '\0') /* stdout? */
127 new_file_mask->fd = 1;
128 else /* no, open as usual */
130 new_file_mask->fd = open (fname_a, O_WRONLY|O_CREAT|O_APPEND, 0666);
131 if (new_file_mask->fd == -1)
137 int gw_log (unsigned level_a, const char *event_type, const char *format, ...)
139 static char emit_str[2048];
140 struct file_mask *list;
143 unsigned e_level = level_a & level;
149 if (!e_level) /* any effective level(s)? */
152 va_start (ap, format);
153 gettimeofday (&tv, NULL);
155 memcpy (&tms, localtime (&tv.tv_sec), sizeof(tms));
156 sprintf (emit_str, "%s %d %02d%02d%02d%02d%02d%02d%03d %d %s ",
158 tms.tm_year, 1+tms.tm_mon, tms.tm_mday,
159 tms.tm_hour, tms.tm_min, tms.tm_sec,
160 (int) (tv.tv_usec/1000),
161 e_level, event_type);
162 if ((cp = strchr (emit_str, '\n'))) /* remove \n from ctime-str */
164 count = strlen (emit_str);
165 vsprintf (emit_str+count, format, ap);
166 if (level_a & GW_LOG_ERRNO)
168 strcat (emit_str, ": ");
169 strcat (emit_str, strerror (errno));
171 strcat (emit_str, "\n");
172 count = strlen (emit_str);
174 /* go through file mask list... */
175 for (list = file_mask_list; list; list = list->next)
176 if (list->mask & e_level) /* output this one? */
178 e_level &= ~list->mask; /* remove from effective level */
179 if (write (list->fd, emit_str, count) != count)
182 if (e_level) /* bits left on effective level? */
183 write (2, emit_str, count);