2 * Implementation of logging facilities.
4 * Europagate, 1994-1995.
7 * Revision 1.6 1995/03/28 08:01:51 adam
8 * Bug fix: GW_LOG_ERRNO.
10 * Revision 1.5 1995/03/27 12:51:10 adam
11 * New log level in use: GW_LOG_ERRNO.
13 * Revision 1.4 1995/02/23 08:32:22 adam
16 * Revision 1.2 1995/02/17 17:06:56 adam
17 * Remove everything before '/' in app_name. Use compact date format.
19 * Revision 1.1.1.1 1995/02/09 17:27:12 adam
20 * Initial version of email gateway under CVS control.
22 * Initial: Dec 7, 94 (Adam Dickmeiss)
36 static char *app_name = NULL;
37 static unsigned level = GW_LOG_DEFAULT;
38 static int session = 0;
41 unsigned mask; /* level mask for this file entry */
42 int fd; /* file descriptor for this file */
43 char *fname; /* name of file ("" if stdout) */
44 struct file_mask *next; /* next file in chain */
47 struct file_mask *file_mask_list = NULL;
49 char *gw_strdup (const char *s)
51 char *n = malloc (strlen(s)+1);
57 void gw_log_init (const char *app_name_a)
59 struct file_mask *list, *list1;
62 if ((cp = strrchr (app_name_a, '/')))
63 app_name = gw_strdup (cp+1);
65 app_name = gw_strdup (app_name_a);
66 level = GW_LOG_DEFAULT;
69 /* clean up all output file masks... */
70 for (list = file_mask_list; list; list = list1)
72 if (list->fd > 2) /* avoid closing stdout/stderr */
78 file_mask_list = NULL;
81 void gw_log_level (unsigned level_a)
86 void gw_log_session (int session_a)
91 int gw_log_file (unsigned level_a, const char *fname_a)
93 struct file_mask **listp, *new_file_mask;
94 listp = &file_mask_list;
96 /* go through file mask list and close files already associated */
100 if (!((*listp)->mask &= ~level_a)) /* any levels left on this one? */
102 if ((*listp)->fd > 2) /* close if not stdout/stderr */
103 close ((*listp)->fd);
104 free ((*listp)->fname);
105 *listp = (*listp)->next;
107 listp = &(*listp)->next;
109 if (!fname_a) /* stderr? */
110 return 0; /* stderr doesn't appear on list */
111 new_file_mask = malloc (sizeof(*new_file_mask));
114 new_file_mask->mask = level_a;
115 new_file_mask->next = file_mask_list;
116 file_mask_list = new_file_mask;
117 if (!(file_mask_list->fname = gw_strdup (fname_a)))
119 if (*fname_a == '\0') /* stdout? */
120 new_file_mask->fd = 1;
121 else /* no, open as usual */
123 new_file_mask->fd = open (fname_a, O_WRONLY|O_CREAT|O_APPEND, 0666);
124 if (new_file_mask->fd == -1)
130 int gw_log (unsigned level_a, const char *event_type, const char *format, ...)
132 static char emit_str[2048];
133 struct file_mask *list;
135 unsigned e_level = level_a & level;
142 if (!e_level) /* any effective level(s)? */
145 va_start (ap, format);
147 memcpy (&tms, localtime (&time_now), sizeof(tms));
148 sprintf (emit_str, "%s %d %02d%02d%02d%02d%02d%02d %d %s ",
150 tms.tm_year, tms.tm_mon, tms.tm_mday,
151 tms.tm_hour, tms.tm_min, tms.tm_sec,
152 e_level, event_type);
153 if ((cp = strchr (emit_str, '\n'))) /* remove \n from ctime-str */
155 count = strlen (emit_str);
156 vsprintf (emit_str+count, format, ap);
157 if (level_a & GW_LOG_ERRNO)
159 strcat (emit_str, ": ");
160 strcat (emit_str, strerror (errno));
162 strcat (emit_str, "\n");
163 count = strlen (emit_str);
165 /* go through file mask list... */
166 for (list = file_mask_list; list; list = list->next)
167 if (list->mask & e_level) /* output this one? */
169 e_level &= ~list->mask; /* remove from effective level */
170 if (write (list->fd, emit_str, count) != count)
173 if (e_level) /* bits left on effective level? */
174 write (2, emit_str, count);