2 * Implementation of logging facilities.
4 * Europagate, 1994-1995.
7 * Revision 1.7 1995/04/10 13:20:25 adam
8 * Use gettimeofday(2) instead of time(2) to get log time in milliseconds.
10 * Revision 1.6 1995/03/28 08:01:51 adam
11 * Bug fix: GW_LOG_ERRNO.
13 * Revision 1.5 1995/03/27 12:51:10 adam
14 * New log level in use: GW_LOG_ERRNO.
16 * Revision 1.4 1995/02/23 08:32:22 adam
19 * Revision 1.2 1995/02/17 17:06:56 adam
20 * Remove everything before '/' in app_name. Use compact date format.
22 * Revision 1.1.1.1 1995/02/09 17:27:12 adam
23 * Initial version of email gateway under CVS control.
25 * Initial: Dec 7, 94 (Adam Dickmeiss)
40 static char *app_name = NULL;
41 static unsigned level = GW_LOG_DEFAULT;
42 static int session = 0;
45 unsigned mask; /* level mask for this file entry */
46 int fd; /* file descriptor for this file */
47 char *fname; /* name of file ("" if stdout) */
48 struct file_mask *next; /* next file in chain */
51 struct file_mask *file_mask_list = NULL;
53 char *gw_strdup (const char *s)
55 char *n = malloc (strlen(s)+1);
61 void gw_log_init (const char *app_name_a)
63 struct file_mask *list, *list1;
66 if ((cp = strrchr (app_name_a, '/')))
67 app_name = gw_strdup (cp+1);
69 app_name = gw_strdup (app_name_a);
70 level = GW_LOG_DEFAULT;
73 /* clean up all output file masks... */
74 for (list = file_mask_list; list; list = list1)
76 if (list->fd > 2) /* avoid closing stdout/stderr */
82 file_mask_list = NULL;
85 void gw_log_level (unsigned level_a)
90 void gw_log_session (int session_a)
95 int gw_log_file (unsigned level_a, const char *fname_a)
97 struct file_mask **listp, *new_file_mask;
98 listp = &file_mask_list;
100 /* go through file mask list and close files already associated */
104 if (!((*listp)->mask &= ~level_a)) /* any levels left on this one? */
106 if ((*listp)->fd > 2) /* close if not stdout/stderr */
107 close ((*listp)->fd);
108 free ((*listp)->fname);
109 *listp = (*listp)->next;
111 listp = &(*listp)->next;
113 if (!fname_a) /* stderr? */
114 return 0; /* stderr doesn't appear on list */
115 new_file_mask = malloc (sizeof(*new_file_mask));
118 new_file_mask->mask = level_a;
119 new_file_mask->next = file_mask_list;
120 file_mask_list = new_file_mask;
121 if (!(file_mask_list->fname = gw_strdup (fname_a)))
123 if (*fname_a == '\0') /* stdout? */
124 new_file_mask->fd = 1;
125 else /* no, open as usual */
127 new_file_mask->fd = open (fname_a, O_WRONLY|O_CREAT|O_APPEND, 0666);
128 if (new_file_mask->fd == -1)
134 int gw_log (unsigned level_a, const char *event_type, const char *format, ...)
136 static char emit_str[2048];
137 struct file_mask *list;
140 unsigned e_level = level_a & level;
146 if (!e_level) /* any effective level(s)? */
149 va_start (ap, format);
150 gettimeofday (&tv, NULL);
152 memcpy (&tms, localtime (&tv.tv_sec), sizeof(tms));
153 sprintf (emit_str, "%s %d %02d%02d%02d%02d%02d%02d%03d %d %s ",
155 tms.tm_year, tms.tm_mon, tms.tm_mday,
156 tms.tm_hour, tms.tm_min, tms.tm_sec,
157 (int) (tv.tv_usec/1000),
158 e_level, event_type);
159 if ((cp = strchr (emit_str, '\n'))) /* remove \n from ctime-str */
161 count = strlen (emit_str);
162 vsprintf (emit_str+count, format, ap);
163 if (level_a & GW_LOG_ERRNO)
165 strcat (emit_str, ": ");
166 strcat (emit_str, strerror (errno));
168 strcat (emit_str, "\n");
169 count = strlen (emit_str);
171 /* go through file mask list... */
172 for (list = file_mask_list; list; list = list->next)
173 if (list->mask & e_level) /* output this one? */
175 e_level &= ~list->mask; /* remove from effective level */
176 if (write (list->fd, emit_str, count) != count)
179 if (e_level) /* bits left on effective level? */
180 write (2, emit_str, count);