Logs program name that locks serial ports

mbtask/Makefile

@@ -6,13 +6,13 @@ include ../Makefile.global
 
 SRCS		= callstat.c scanout.c taskcomm.c taskinfo.c taskstat.c taskibc.c \
 		  mbtask.c outstat.c signame.c taskdisk.c taskregs.c taskutil.c \
-		  ports.c calllist.c ping.c taskchat.c crc.c
+		  ports.c calllist.c ping.c taskchat.c crc.c pidinfo.c
 HDRS		= callstat.h mbtask.h outstat.h signame.h taskdisk.h taskregs.h  taskutil.h \
 		  scanout.h taskcomm.h taskinfo.h taskstat.h taskibc.h \
 		  ports.h calllist.h ping.h taskchat.h
 OBJS		= callstat.o scanout.o taskcomm.o taskinfo.o taskstat.o taskibc.o \
 		  mbtask.o outstat.o signame.o taskdisk.o taskregs.o taskutil.o \
-		  ports.o calllist.o ping.o taskchat.o crc.o
+		  ports.o calllist.o ping.o taskchat.o crc.o pidinfo.o
 SLIBS		= ../lib/libnodelist.a
 OTHER		= Makefile issue issue.netbsd
 

mbtask/pidinfo.c

@@ -0,0 +1,119 @@
+/*****************************************************************************
+ *
+ * $Id$
+ * Purpose ...............: Pid utilities
+ *
+ *****************************************************************************
+ * Copyright (C) 1997-2005
+ *   
+ * Michiel Broek		FIDO:	2:280/2802
+ * Beekmansbos 10
+ * 1971 BV IJmuiden
+ * the Netherlands
+ *
+ * This file is part of MBSE BBS.
+ *
+ * This BBS is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * MBSE BBS is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with MBSE BBS; see the file COPYING.  If not, write to the Free
+ * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *****************************************************************************/
+
+#include "../config.h"
+#include "../lib/mbselib.h"
+
+
+/*
+ * Find the program name for a given pid. The progname buffer
+ * has te be allocated with size byte.
+ */
+int pid2prog(pid_t pid, char *progname, size_t size)
+{
+#if defined(__OpenBSD__)
+#define ARG_SIZE 60
+    static char **s, buf[ARG_SIZE];
+    size_t      siz = 100;
+    char        **p;
+    int         mib[4];
+#elif defined(__NetBSD__)
+#define ARG_SIZE 60
+    static char **s;
+    size_t      siz = 100;
+    int         mib[4];
+#else
+    char        temp[PATH_MAX];
+    FILE        *fp;
+#endif
+
+#if defined(__OpenBSD__)
+    /*
+     * Systems that use sysctl to get process information
+     */
+    mib[0] = CTL_KERN;
+    mib[1] = KERN_PROC_ARGS;
+    mib[2] = pid;
+    mib[3] = KERN_PROC_ARGV;
+    if ((s = realloc(s, siz)) == NULL) {
+	WriteError("pid2prog(): no memory");
+	return -1;
+    }
+    if (sysctl(mib, 4, s, &siz, NULL, 0) == -1) {
+	WriteError("$pid2prog() sysctl call failed");
+	return -1;
+    }
+    buf[0] = '\0';
+    for (p = s; *p != NULL; p++) {
+	if (p != s)
+	    strlcat(buf, " ", sizeof(buf));
+	strlcat(buf, *p, sizeof(buf));
+    }
+    strncpy(progname, buf, size);
+    return 0;
+
+#elif defined(__NetBSD__)
+    /*
+     * Systems that use sysctl to get process information
+     */
+    mib[0] = CTL_KERN;
+    mib[1] = KERN_PROC_ARGS;
+    mib[2] = pid;
+    mib[3] = KERN_PROC_ARGV;
+    if ((s = realloc(s, siz)) == NULL) {
+	WriteError("pid2prog(): no memory");
+	return -1;
+    }
+    if (sysctl(mib, 4, s, &siz, NULL, 0) == -1) {
+	WriteError("$pid2prog() sysctl call failed");
+	return -1;
+    }
+//    parent = xstrcpy((char *)s);
+    strncpy(progname, (char *)s, size);
+    return 0;
+
+#else
+    /*
+     *  Systems with /proc filesystem like Linux, FreeBSD
+     */
+    snprintf(temp, PATH_MAX, "/proc/%d/cmdline", pid);
+    if ((fp = fopen(temp, "r")) == NULL) {
+	WriteError("$Can't read %s", temp);
+	return -1;
+    }
+    fgets(temp, PATH_MAX-1, fp);
+    fclose(fp);
+    strncpy(progname, temp, size);
+    return 0;
+
+#endif
+}
+
+

mbtask/ports.c

@@ -183,7 +183,7 @@ void load_ports()
 void check_ports(void)
 {
     pp_list	*tpl;
-    char	*lckname;
+    char	*lckname, *progname;
     FILE	*lf;
     int		tmppid, changed = FALSE;
     pid_t	rempid = 0;
@@ -215,7 +215,12 @@ void check_ports(void)
 		if (!tpl->locked) {
 		    tpl->locked = rempid;
 		    tpl->locktime = 0;
-		    Syslog('+', "Port %s locked, pid %d", tpl->tty, rempid);
+		    progname = calloc(PATH_MAX, sizeof(char));
+		    if (pid2prog(rempid, progname, PATH_MAX) == 0)
+			Syslog('+', "Port %s locked, pid %d (%s)", tpl->tty, rempid, progname);
+		    else
+			Syslog('+', "Port %s locked, pid %d", tpl->tty, rempid);
+		    free(progname);
 		} else {
 		    /*
 		     * Count locktime