7 static char *rcsid_gdb_c = "$Header$";
11 /************************************************************************/
15 /* Global Database Library - main controlling functions and globally
18 /* Author: Noah Mendelsohn
20 /* Copyright: 1986 MIT Project Athena
23 /* In addition to defining the main routines for gdb, this source
24 /* file #includes gdb_lib.h, which does the external definitions
25 /* for all global data used by the library. Everyone else gets
26 /* externs for this data defined by gdb.h.
28 /************************************************************************/
39 extern char *sys_errlist[];
43 /* This global is defined to make sure that Moira clients are linked
44 * against the correct library.
46 int link_against_the_moira_version_of_gdb = 0;
47 int g_inited = FALSE; /* gdb_init has not been */
50 /*----------------------------------------------------------*/
54 /* Initialize the global database facility. Must be
55 /* called before any of the other gdb functions
56 /* are used. Among other things, this function
57 /* sets to ignore signals for writing on broken pipes.
59 /*----------------------------------------------------------*/
65 char hostname[255]; /* name of local host */
66 extern uid_t getuid();
67 int uid; /* Unix user-i.d. number */
68 char *uname; /* string form of i.d. */
70 struct passwd *pw_struct; /* passwd entry comes back */
73 * So we know we've been initialized, and we do it only once
80 * Initialize the system defined types table
85 * Initialize the connection control data structures.
87 gdb_mcons = 0; /* number of connections */
89 for (i=0; i<GDB_MAX_CONNECTIONS; i++) {
90 gdb_cons[i].id = GDB_CON_ID;
91 gdb_cons[i].in.stream_buffer = NULL;
92 gdb_cons[i].in.stream_buffer_length = GDB_STREAM_BUFFER_SIZE;
95 * Initialize the fd maps
99 for (i=0; i<NFDBITS/sizeof(int); i++) {
100 gdb_crfds.fds_bits[i] = 0;
101 gdb_cwfds.fds_bits[i] = 0;
102 gdb_cefds.fds_bits[i] = 0;
106 * Initialize the server/client layer
111 * Ignore the signal generated when writing to a pipe which has been
112 * closed at the other end. gdb_move_data handles this condition
115 (void) signal(SIGPIPE, SIG_IGN);
118 * Make a note of the local host and user name
120 if (gethostname(hostname, sizeof(hostname)-1)!=0)
121 (void) strcpy(hostname, "????");
122 gdb_host = db_alloc(strlen(hostname)+1);
123 (void) strcpy(gdb_host, hostname);
127 pw_struct = getpwuid(uid);
129 if (pw_struct != NULL && pw_struct ->pw_name != NULL &&
130 *pw_struct->pw_name !='\0')
131 uname = pw_struct->pw_name;
134 gdb_uname = db_alloc(strlen(uname)+1);
135 (void) strcpy(gdb_uname, uname);
139 /*----------------------------------------------------------*/
143 /* Make sure gdb has been initialized, blow up if not.
145 /*----------------------------------------------------------*/
151 GDB_GIVEUP("You must call gdb_init before using GDB services.")
154 /*----------------------------------------------------------*/
158 /* Count the number of bits in a word. Adapted from
161 /*----------------------------------------------------------*/
167 register unsigned int x = inp; /* the word to check */
168 register int count; /* the count to return */
170 for (count=0; x !=0; x=x>>1)
177 /*----------------------------------------------------------*/
181 /* Utility routine to conditionally free a null
182 /* terminated string.
184 /*----------------------------------------------------------*/
191 db_free(str, strlen(str)+1);
194 /*----------------------------------------------------------*/
198 /* Called when a fatal error occurs.
200 /*----------------------------------------------------------*/
206 fprintf(gdb_log,"\n\nFATAL GDB ERROR:\n\n\t");
207 fprintf(gdb_log,errormsg);
208 fprintf(gdb_log,"\n\n");
212 /*----------------------------------------------------------*/
216 /* Acts like gdb_perror, but takes its errno from
217 /* the connection. Resets errno as a side effect.
218 /* THIS ROUTINE IS A NO_OP IF connection_status(con)!=CON_STOPPING
220 /*----------------------------------------------------------*/
223 connection_perror(con, msg)
227 if (con == NULL || connection_status(con) != CON_STOPPING)
229 errno = connection_errno(con);
233 /*----------------------------------------------------------*/
237 /* Performs same function as system perror, but does
238 /* it on gdb_log instead of stderr.
240 /*----------------------------------------------------------*/
247 fprintf(gdb_log, "%s: ", msg);
249 fprintf(gdb_log, "%s.\n", sys_errlist[errno]);
251 fprintf(gdb_log, "errno %d is out of range of message table.\n");