devfsd: style cleanup; size reduction (Tito <farmatito@tiscali.it>)

traceroute: suppress warning

2 files changed, 48 insertions, 135 deletions

diff --git a/miscutils/devfsd.c b/miscutils/devfsd.c
index 0aec94232..dfb616abe 100644
--- a/miscutils/devfsd.c
+++ b/miscutils/devfsd.c
@@ -322,13 +322,7 @@ static void msg_logger_and_die(int pri, const char* fmt, ...)
 #define devfsd_error_msg(fmt, args...)                bb_error_msg(fmt, ## args)
 #define devfsd_perror_msg_and_die(fmt, args...)       bb_perror_msg_and_die(fmt, ## args)
 #define devfsd_error_msg_and_die(fmt, args...)        bb_error_msg_and_die(fmt, ## args)
-#if defined(CONFIG_DEBUG)
-#define debug_msg_logger(x, fmt, args...)             msg_logger(x, fmt, ## args)
 #else
-#define debug_msg_logger(x, fmt, args...)
-#endif
-#else
-#define debug_msg_logger(x, fmt, args...)
 #define msg_logger(p, fmt, args...)
 #define msg_logger_and_die(p, fmt, args...)           exit(1)
 #define devfsd_perror_msg_and_die(fmt, args...)       exit(1)
@@ -448,8 +442,7 @@ int devfsd_main(int argc, char **argv)
 
         mount_point = argv[1];
 
-        if (chdir(mount_point) != 0)
-                devfsd_perror_msg_and_die(mount_point);
+        xchdir(mount_point);
 
         fd = xopen(".devfsd", O_RDONLY);
 
@@ -509,7 +502,7 @@ int devfsd_main(int argc, char **argv)
                 free_config();
                 read_config_file((char*)CONFIG_FILE, FALSE, &event_mask);
                 if (do_scan)
-                        dir_operation(SERVICE,mount_point,0,NULL);
+                        dir_operation(SERVICE, mount_point, 0, NULL);
         }
 }   /*  End Function main  */
 
@@ -530,8 +523,6 @@ static void read_config_file(char *path, int optional, unsigned long *event_mask
         char buf[STRING_LENGTH];
         char *line = NULL;
 
-        debug_msg_logger(LOG_INFO, "%s: %s", __FUNCTION__, path);
-
         if (stat(path, &statbuf) == 0) {
                 /* Don't read 0 length files: ignored */
                 /*if (statbuf.st_size == 0)
@@ -588,9 +579,8 @@ static void process_config_line(const char *line, unsigned long *event_mask)
                 "RMOLDCOMPAT", "RMNEWCOMPAT", 0
         };
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
-        for (count = 0; count < MAX_ARGS; ++count) p[count][0] = '\0';
+        for (count = 0; count < MAX_ARGS; ++count)
+                p[count][0] = '\0';
         num_args = sscanf(line, "%s %s %s %s %s %s %s %s %s %s",
                         when, name, what,
                         p[0], p[1], p[2], p[3], p[4], p[5], p[6]);
@@ -616,14 +606,13 @@ static void process_config_line(const char *line, unsigned long *event_mask)
         }
         /* "RESTORE" */
         if (i == 3) {
-                dir_operation(RESTORE,name, strlen(name),NULL);
+                dir_operation(RESTORE, name, strlen(name),NULL);
                 return;
         }
         if (num_args < 3)
                 goto process_config_line_err;
 
-        new = xmalloc(sizeof *new);
-        memset(new, 0, sizeof *new);
+        new = xzalloc(sizeof *new);
 
         for (count = 0; event_types[count].config_name != NULL; ++count) {
                 if (strcasecmp(when, event_types[count].config_name) != 0)
@@ -632,7 +621,7 @@ static void process_config_line(const char *line, unsigned long *event_mask)
                 break;
         }
         if (event_types[count].config_name == NULL) {
-                msg="WHEN in";
+                msg = "WHEN in";
                 goto process_config_line_err;
         }
 
@@ -643,7 +632,7 @@ static void process_config_line(const char *line, unsigned long *event_mask)
                         new->action.what = AC_PERMISSIONS;
                         /*  Get user and group  */
                         if ((ptr = strchr(p[0], '.')) == NULL) {
-                                msg="UID.GID";
+                                msg = "UID.GID";
                                 goto process_config_line_err; /*"missing '.' in UID.GID"*/
                         }
 
@@ -695,7 +684,7 @@ static void process_config_line(const char *line, unsigned long *event_mask)
                         new->action.what = i - 2;
                         break;
                 default:
-                        msg ="WHAT in";
+                        msg = "WHAT in";
                         goto process_config_line_err;
                 /*esac*/
         } /* switch (i) */
@@ -725,8 +714,6 @@ static int do_servicing(int fd, unsigned long event_mask)
         struct devfsd_notify_struct info;
         unsigned long tmp_event_mask;
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         /*  Tell devfs what events we care about  */
         tmp_event_mask = event_mask;
         do_ioctl_and_die(fd, DEVFSDIOC_SET_EVENT_MASK, tmp_event_mask);
@@ -761,9 +748,8 @@ static void service_name(const struct devfsd_notify_struct *info)
         regmatch_t mbuf[MAX_SUBEXPR];
         struct config_entry_struct *entry;
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
         if (ENABLE_DEBUG && info->overrun_count > 0)
-                debug_msg_logger(LOG_ERR, "lost %u events", info->overrun_count);
+                msg_logger(LOG_ERR, "lost %u events", info->overrun_count);
 
         /*  Discard lookups on "/dev/log" and "/dev/initctl"  */
         if (info->type == DEVFSD_NOTIFY_LOOKUP 
@@ -784,8 +770,6 @@ static void service_name(const struct devfsd_notify_struct *info)
                 for (n = 0;(n < MAX_SUBEXPR) && (mbuf[n].rm_so != -1); ++n)
                         /* VOID */;
 
-                debug_msg_logger(LOG_INFO, "%s: action.what %d", __FUNCTION__, entry->action.what);
-
                 switch (entry->action.what) {
                         case AC_PERMISSIONS:
                                 action_permissions(info, entry);
@@ -825,13 +809,11 @@ static void action_permissions(const struct devfsd_notify_struct *info,
 {
         struct stat statbuf;
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         if (stat(info->devname, &statbuf) != 0  ||
                  chmod(info->devname,(statbuf.st_mode & S_IFMT) |(entry->u.permissions.mode & ~S_IFMT)) != 0 ||
-                 chown(info->devname, entry->u.permissions.uid, entry->u.permissions.gid) != 0) {
-                msg_logger(LOG_ERR, "Can't chmod or chown: %s: %m",info->devname);
-        }
+                chown(info->devname, entry->u.permissions.uid, entry->u.permissions.gid) != 0
+        )
+                msg_logger(LOG_ERR, "Can't chmod or chown: %s: %m", info->devname);
 }   /*  End Function action_permissions  */
 
 static void action_modload(const struct devfsd_notify_struct *info,
@@ -843,18 +825,16 @@ static void action_modload(const struct devfsd_notify_struct *info,
 */
 {
         char *argv[6];
-        char device[STRING_LENGTH];
 
         argv[0] =(char*)MODPROBE;
         argv[1] =(char*)MODPROBE_SWITCH_1; /* "-k" */
         argv[2] =(char*)MODPROBE_SWITCH_2; /* "-C" */
         argv[3] =(char*)CONFIG_MODULES_DEVFS;
-        argv[4] = device;
+        argv[4] = concat_path_file("/dev", info->devname); /* device */
         argv[5] = NULL;
 
-        snprintf(device, sizeof(device), "/dev/%s", info->devname);
-        debug_msg_logger(LOG_INFO, "%s: %s %s %s %s %s",__FUNCTION__, argv[0],argv[1],argv[2],argv[3],argv[4]);
         fork_and_execute(DIE, argv[0], argv);
+        free(argv[4]);
 }  /*  End Function action_modload  */
 
 static void action_execute(const struct devfsd_notify_struct *info,
@@ -874,7 +854,6 @@ static void action_execute(const struct devfsd_notify_struct *info,
         char *argv[MAX_ARGS + 1];
         char largv[MAX_ARGS + 1][STRING_LENGTH];
 
-        debug_msg_logger(LOG_INFO ,__FUNCTION__);
         gv_info.info = info;
         gv_info.devname = info->devname;
         snprintf(gv_info.devpath, sizeof(gv_info.devpath), "%s/%s", mount_point, info->devname);
@@ -908,8 +887,6 @@ static void action_copy(const struct devfsd_notify_struct *info,
         char source[STRING_LENGTH], destination[STRING_LENGTH];
         int ret = 0;
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         dest_stat.st_mode = 0;
 
         if ((info->type == DEVFSD_NOTIFY_CHANGE) && S_ISLNK(info->mode))
@@ -935,8 +912,8 @@ static void action_copy(const struct devfsd_notify_struct *info,
         else if ((info->type == DEVFSD_NOTIFY_CHANGE) &&(dest_stat.st_mode & S_ISVTX))
                 new_mode |= S_ISVTX;
         ret = copy_inode(destination, &dest_stat, new_mode, source, &source_stat);
-        if (ENABLE_DEBUG && ret &&(errno != EEXIST))
-                debug_msg_logger(LOG_ERR, "copy_inode: %s to %s: %m", source, destination);
+        if (ENABLE_DEBUG && ret && (errno != EEXIST))
+                msg_logger(LOG_ERR, "copy_inode: %s to %s: %m", source, destination);
 }   /*  End Function action_copy  */
 
 static void action_compat(const struct devfsd_notify_struct *info, unsigned int action)
@@ -978,16 +955,14 @@ static void action_compat(const struct devfsd_notify_struct *info, unsigned int
                 case AC_MKNEWCOMPAT:
                 case AC_RMNEWCOMPAT:
                         ptr = strrchr(info->devname, '/') + 1;
-                        i=scan_dev_name(info->devname, info->namelen, ptr);
-
-                        debug_msg_logger(LOG_INFO, "%s: scan_dev_name = %d", __FUNCTION__, i);
+                        i = scan_dev_name(info->devname, info->namelen, ptr);
 
                         /* nothing found */
-                        if (i==0 || i > 9)
+                        if (i == 0 || i > 9)
                                 return;
 
-                        sscanf(info->devname +((i<6)?5:4), "host%d/bus%d/target%d/lun%d/", &host, &bus, &target, &lun);
-                        snprintf(dest_buf, sizeof(dest_buf), "../%s", info->devname +((i>5)?4:0));
+                        sscanf(info->devname + ((i < 6) ? 5 : 4), "host%d/bus%d/target%d/lun%d/", &host, &bus, &target, &lun);
+                        snprintf(dest_buf, sizeof(dest_buf), "../%s", info->devname + (( i > 5) ? 4 : 0));
                         dest_name = dest_buf;
                         compat_name = compat_buf;
 
@@ -1010,7 +985,7 @@ static void action_compat(const struct devfsd_notify_struct *info, unsigned int
                                         mode = ptr[2] - 107; /* 1 or 2 */
                                 if (ptr[2] ==  'a')
                                         mode = 3;
-                                sprintf(compat_buf, fmt [i], host, bus, target, lun, mode, rewind_);
+                                sprintf(compat_buf, fmt[i], host, bus, target, lun, mode, rewind_);
                         }
 
                         /* 9 == ide/host/mt */
@@ -1022,8 +997,6 @@ static void action_compat(const struct devfsd_notify_struct *info, unsigned int
         if (compat_name == NULL)
                 return;
 
-        debug_msg_logger(LOG_INFO, "%s: %s", __FUNCTION__, compat_name);
-
         /*  Now decide what to do with it  */
         switch (action) {
                 case AC_MKOLDCOMPAT:
@@ -1034,7 +1007,7 @@ static void action_compat(const struct devfsd_notify_struct *info, unsigned int
                 case AC_RMNEWCOMPAT:
                         ret = unlink(compat_name);
                         if (ENABLE_DEBUG && ret)
-                                debug_msg_logger(LOG_ERR, "unlink: %s: %m", compat_name);
+                                msg_logger(LOG_ERR, "unlink: %s: %m", compat_name);
                         break;
                 /*esac*/
         } /* switch (action) */
@@ -1042,15 +1015,13 @@ static void action_compat(const struct devfsd_notify_struct *info, unsigned int
 
 static void restore(char *spath, struct stat source_stat, int rootlen)
 {
-        char dpath[STRING_LENGTH];
+        char *dpath;
         struct stat dest_stat;
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         dest_stat.st_mode = 0;
-        snprintf(dpath, sizeof dpath, "%s%s", mount_point, spath + rootlen);
+        dpath = concat_path_file(mount_point, spath + rootlen);
         lstat(dpath, &dest_stat);
-
+        free(dpath);
         if (S_ISLNK(source_stat.st_mode) ||(source_stat.st_mode & S_ISVTX))
                 copy_inode(dpath, &dest_stat,(source_stat.st_mode & ~S_ISVTX) , spath, &source_stat);
 
@@ -1077,8 +1048,6 @@ static int copy_inode(const char *destpath, const struct stat *dest_stat,
         struct sockaddr_un un_addr;
         char symlink_val[STRING_LENGTH];
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         if ((source_stat->st_mode & S_IFMT) ==(dest_stat->st_mode & S_IFMT)) {
                 /*  Same type  */
                 if (S_ISLNK(source_stat->st_mode)) {
@@ -1150,8 +1119,6 @@ static void free_config(void)
         struct config_entry_struct *c_entry;
         void *next;
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         for (c_entry = first_config; c_entry != NULL; c_entry = next) {
                 unsigned int count;
 
@@ -1184,11 +1151,6 @@ static int get_uid_gid(int flag, const char *string)
         if (ENABLE_DEVFSD_VERBOSE)
                 msg = "user";
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
-        if (ENABLE_DEBUG && flag != UID && flag != GID)
-                msg_logger_and_die(LOG_ERR,"%s: flag != UID && flag != GID", __FUNCTION__);
-
         if (isdigit(string[0]) ||((string[0] == '-') && isdigit(string[1])))
                 return atoi(string);
 
@@ -1214,8 +1176,6 @@ static mode_t get_mode(const char *string)
         mode_t mode;
         int i;
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         if (isdigit(string[0]))
                 return strtoul(string, NULL, 8);
         if (strlen(string) != 9)
@@ -1226,7 +1186,7 @@ static mode_t get_mode(const char *string)
         while (i > 0) {
                 if (string[0] == 'r' || string[0] == 'w' || string[0] == 'x')
                         mode += i;
-                i = i/2;
+                i = i / 2;
                 string++;
         }
         return mode;
@@ -1234,8 +1194,6 @@ static mode_t get_mode(const char *string)
 
 static void signal_handler(int sig)
 {
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         caught_signal = TRUE;
         if (sig == SIGHUP)
                 caught_sighup = TRUE;
@@ -1252,8 +1210,6 @@ static const char *get_variable(const char *variable, void *info)
                                                                    gv_info->devpath, gv_info->devname, 0 };
         int i;
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         if (gethostname(hostname, STRING_LENGTH - 1) != 0)
                 msg_logger_and_die(LOG_ERR, "gethostname: %m");
 
@@ -1266,7 +1222,6 @@ static const char *get_variable(const char *variable, void *info)
         if (i > 6 || i < 0 || (i > 1 && gv_info == NULL))
                         return NULL;
         if (i >= 0 && i <= 3) {
-                debug_msg_logger(LOG_INFO, "%s: i=%d %s", __FUNCTION__, i, field_names[i + 7]);
                 return field_names[i + 7];
         }
 
@@ -1276,9 +1231,6 @@ static const char *get_variable(const char *variable, void *info)
                 sprintf(sbuf, "%u", gv_info->info->gid);
         else if (i == 6)
                 sprintf(sbuf, "%o", gv_info->info->mode);
-
-        debug_msg_logger(LOG_INFO, "%s: %s", __FUNCTION__, sbuf);
-
         return sbuf;
 }   /*  End Function get_variable  */
 
@@ -1286,8 +1238,6 @@ static void service(struct stat statbuf, char *path)
 {
         struct devfsd_notify_struct info;
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         memset(&info, 0, sizeof info);
         info.type = DEVFSD_NOTIFY_REGISTERED;
         info.mode = statbuf.st_mode;
@@ -1314,37 +1264,30 @@ static void dir_operation(int type, const char * dir_name, int var, unsigned lon
         struct stat statbuf;
         DIR *dp;
         struct dirent *de;
-        char path[STRING_LENGTH];
-
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
+        char *path;
 
-        if ((dp = opendir(dir_name))==NULL) {
-                debug_msg_logger(LOG_ERR, "opendir: %s: %m", dir_name);
+        if ((dp = warn_opendir(dir_name)) == NULL)
                 return;
-        }
 
         while ((de = readdir(dp)) != NULL) {
 
                 if (de->d_name && DOT_OR_DOTDOT(de->d_name))
                         continue;
-                snprintf(path, sizeof(path), "%s/%s", dir_name, de->d_name);
-                debug_msg_logger(LOG_ERR, "%s: %s", __FUNCTION__, path);
-
-                if (lstat(path, &statbuf) != 0) {
-                        debug_msg_logger(LOG_ERR, "%s: %s: %m", __FUNCTION__, path);
-                        continue;
-                }
-                switch (type) {
-                        case SERVICE:
-                                service(statbuf, path);
-                                break;
-                        case RESTORE:
-                                restore(path, statbuf, var);
-                                break;
-                        case READ_CONFIG:
-                                read_config_file(path, var, event_mask);
-                                break;
+                path = concat_path_file(dir_name, de->d_name);
+                if (lstat(path, &statbuf) == 0) {
+                        switch (type) {
+                                case SERVICE:
+                                        service(statbuf, path);
+                                        break;
+                                case RESTORE:
+                                        restore(path, statbuf, var);
+                                        break;
+                                case READ_CONFIG:
+                                        read_config_file(path, var, event_mask);
+                                        break;
+                        }
                 }
+                free(path);
         }
         closedir(dp);
 }   /*  End Function do_scan_and_service  */
@@ -1356,16 +1299,12 @@ static int mksymlink(const char *oldpath, const char *newpath)
     [RETURNS] 0 on success, else -1.
 */
 {
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         if (!make_dir_tree(newpath))
                 return -1;
 
         if (symlink(oldpath, newpath) != 0) {
-                if (errno != EEXIST) {
-                        debug_msg_logger(LOG_ERR, "%s: %s to %s: %m", __FUNCTION__, oldpath, newpath);
+                if (errno != EEXIST)
                         return -1;
-                }
         }
         return 0;
 }   /*  End Function mksymlink  */
@@ -1377,12 +1316,8 @@ static int make_dir_tree(const char *path)
     [RETURNS] TRUE on success, else FALSE.
 */
 {
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
-        if (bb_make_directory(dirname((char *)path), -1, FILEUTILS_RECUR) == -1) {
-                debug_msg_logger(LOG_ERR, "%s: %s: %m",__FUNCTION__, path);
+        if (bb_make_directory(dirname((char *)path), -1, FILEUTILS_RECUR) == -1)
                 return FALSE;
-        }
         return TRUE;
 } /*  End Function make_dir_tree  */
 
@@ -1409,8 +1344,6 @@ static int expand_expression(char *output, unsigned int outsize,
 {
         char temp[STRING_LENGTH];
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         if (!st_expr_expand(temp, STRING_LENGTH, input, get_variable_func, info))
                 return FALSE;
         expand_regexp(output, outsize, temp, devname, ex, numexp);
@@ -1438,8 +1371,6 @@ static void expand_regexp(char *output, size_t outsize, const char *input,
         const char last_exp = '0' - 1 + numex;
         int c = -1;
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         /*  Guarantee NULL termination by writing an explicit '\0' character into
         the very last byte  */
         if (outsize)
@@ -1555,8 +1486,6 @@ const char *get_old_name(const char *devname, unsigned int namelen,
                 NULL
         };
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         for (trans = translate_table; trans->match != NULL; ++trans) {
                  len = strlen(trans->match);
 
@@ -1576,15 +1505,13 @@ const char *get_old_name(const char *devname, unsigned int namelen,
         else
                 return NULL;
 
-        debug_msg_logger(LOG_INFO, "%s: scan_dev_name = %d", __FUNCTION__, i);
-
         /* 1 == scsi/generic, 3 == scsi/cd, 10 == sbp/ */
         if (i == 1 || i == 3 || i == 10)
                 sprintf(buffer, fmt[i], minor);
 
         /* 2 ==scsi/disc, 4 == scsi/part */
         if (i == 2 || i == 4)
-                compat_name = write_old_sd_name(buffer, major, minor,((i == 2)?"":(ptr + 4)));
+                compat_name = write_old_sd_name(buffer, major, minor,((i == 2) ? "" : (ptr + 4)));
 
         /* 5 == scsi/mt */
         if (i == 5) {
@@ -1617,10 +1544,6 @@ const char *get_old_name(const char *devname, unsigned int namelen,
                 indexx = atoi(devname + 5);
                 sprintf(buffer, fmt[i], (devname[4] == 'm') ? 'p' : 't', pty1[indexx >> 4], pty2[indexx & 0x0f]);
         }
-
-        if (ENABLE_DEBUG && compat_name != NULL)
-                msg_logger(LOG_INFO, "%s: compat_name  %s", __FUNCTION__, compat_name);
-
         return compat_name;
 }   /*  End Function get_old_name  */
 
@@ -1635,8 +1558,6 @@ static char get_old_ide_name(unsigned int major, unsigned int minor)
         char c = 'a';           /*  97 */
         int i = IDE0_MAJOR;
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         /* I hope it works like the previous code as it saves a few bytes. Tito ;P */
         do {
                 if (i == IDE0_MAJOR || i == IDE1_MAJOR || i == IDE2_MAJOR
@@ -1671,8 +1592,6 @@ static char *write_old_sd_name(char *buffer,
 {
         unsigned int disc_index;
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         if (major == 8) {
                 sprintf(buffer, "sd%c%s", 'a' + (minor >> 4), part);
                 return buffer;
@@ -1716,8 +1635,6 @@ int st_expr_expand(char *output, unsigned int length, const char *input,
         struct passwd *pwent;
         char buffer[BUFFER_SIZE], tmp[STRING_LENGTH];
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         if (length > BUFFER_SIZE)
                 length = BUFFER_SIZE;
         for (; TRUE; ++input) {
@@ -1809,8 +1726,6 @@ static const char *expand_variable(char *buffer, unsigned int length,
         const char *env, *ptr;
         char tmp[STRING_LENGTH];
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         ch = input[0];
         if (ch == '$') {
                 /*  Special case for "$$": PID  */
@@ -1943,8 +1858,6 @@ static const char *get_variable_v2(const char *variable,
 {
         const char *value;
 
-        debug_msg_logger(LOG_INFO, __FUNCTION__);
-
         if (func != NULL) {
                 value = (*func)(variable, info);
                 if (value != NULL)
diff --git a/networking/traceroute.c b/networking/traceroute.c
index 577738a97..ad3ec4eda 100644
--- a/networking/traceroute.c
+++ b/networking/traceroute.c
@@ -397,8 +397,8 @@ ifaddrlist(struct IFADDRLIST **ipaddrp)
         ) {
                 if (errno == EINVAL)
                         bb_error_msg_and_die(
-                            "SIOCGIFCONF: ifreq struct too small (%d bytes)",
-                            IFREQ_BUFSIZE * sizeof(ibuf[0]));
+                            "SIOCGIFCONF: ifreq struct too small (%u bytes)",
+                            (unsigned)(IFREQ_BUFSIZE * sizeof(ibuf[0])));
                 bb_perror_msg_and_die("SIOCGIFCONF");
         }
         ifrp = ibuf;