2 * Implementation of logging facilities.
4 * Europagate, 1994-1995.
7 * Revision 1.5 1995/03/27 12:51:10 adam
8 * New log level in use: GW_LOG_ERRNO.
10 * Revision 1.4 1995/02/23 08:32:22 adam
13 * Revision 1.2 1995/02/17 17:06:56 adam
14 * Remove everything before '/' in app_name. Use compact date format.
16 * Revision 1.1.1.1 1995/02/09 17:27:12 adam
17 * Initial version of email gateway under CVS control.
19 * Initial: Dec 7, 94 (Adam Dickmeiss)
33 static char *app_name = NULL;
34 static unsigned level = GW_LOG_DEFAULT;
35 static int session = 0;
38 unsigned mask; /* level mask for this file entry */
39 int fd; /* file descriptor for this file */
40 char *fname; /* name of file ("" if stdout) */
41 struct file_mask *next; /* next file in chain */
44 struct file_mask *file_mask_list = NULL;
46 char *gw_strdup (const char *s)
48 char *n = malloc (strlen(s)+1);
54 void gw_log_init (const char *app_name_a)
56 struct file_mask *list, *list1;
59 if ((cp = strrchr (app_name_a, '/')))
60 app_name = gw_strdup (cp+1);
62 app_name = gw_strdup (app_name_a);
63 level = GW_LOG_DEFAULT;
66 /* clean up all output file masks... */
67 for (list = file_mask_list; list; list = list1)
69 if (list->fd > 2) /* avoid closing stdout/stderr */
75 file_mask_list = NULL;
78 void gw_log_level (unsigned level_a)
83 void gw_log_session (int session_a)
88 int gw_log_file (unsigned level_a, const char *fname_a)
90 struct file_mask **listp, *new_file_mask;
91 listp = &file_mask_list;
93 /* go through file mask list and close files already associated */
97 if (!((*listp)->mask &= ~level_a)) /* any levels left on this one? */
99 if ((*listp)->fd > 2) /* close if not stdout/stderr */
100 close ((*listp)->fd);
101 free ((*listp)->fname);
102 *listp = (*listp)->next;
104 listp = &(*listp)->next;
106 if (!fname_a) /* stderr? */
107 return 0; /* stderr doesn't appear on list */
108 new_file_mask = malloc (sizeof(*new_file_mask));
111 new_file_mask->mask = level_a;
112 new_file_mask->next = file_mask_list;
113 file_mask_list = new_file_mask;
114 if (!(file_mask_list->fname = gw_strdup (fname_a)))
116 if (*fname_a == '\0') /* stdout? */
117 new_file_mask->fd = 1;
118 else /* no, open as usual */
120 new_file_mask->fd = open (fname_a, O_WRONLY|O_CREAT|O_APPEND, 0666);
121 if (new_file_mask->fd == -1)
127 int gw_log (unsigned level_a, const char *event_type, const char *format, ...)
129 static char emit_str[2048];
130 struct file_mask *list;
132 unsigned e_level = level_a & level;
139 if (!e_level) /* any effective level(s)? */
142 va_start (ap, format);
144 memcpy (&tms, localtime (&time_now), sizeof(tms));
145 sprintf (emit_str, "%s %d %02d%02d%02d%02d%02d%02d %d %s ",
147 tms.tm_year, tms.tm_mon, tms.tm_mday,
148 tms.tm_hour, tms.tm_min, tms.tm_sec,
149 e_level, event_type);
150 if ((cp = strchr (emit_str, '\n'))) /* remove \n from ctime-str */
152 count = strlen (emit_str);
153 vsprintf (emit_str+count, format, ap);
154 if (e_level & GW_LOG_ERRNO)
156 strcat (emit_str, ": ");
157 strcat (emit_str, strerror (errno));
159 strcat (emit_str, "\n");
160 count = strlen (emit_str);
162 /* go through file mask list... */
163 for (list = file_mask_list; list; list = list->next)
164 if (list->mask & e_level) /* output this one? */
166 e_level &= ~list->mask; /* remove from effective level */
167 if (write (list->fd, emit_str, count) != count)
170 if (e_level) /* bits left on effective level? */
171 write (2, emit_str, count);