Redo getconfigent, save 150 bytes, still small memory leak when

parsing invalid entries.

diff --git a/networking/inetd.c b/networking/inetd.c
index 1f2b339..eb61299 100644 (file)
--- a/networking/inetd.c
+++ b/networking/inetd.c
@@ -285,116 +285,110 @@ syslog_err_and_discard_dg(int se_socktype, const char *msg, ...)
        _exit(1);
 }
 
-static char *skip(char **cpp)
-{
-       char *cp = *cpp;
-       char *start;
-
-       if ((cpp == NULL) || (*cpp == NULL) || (**cpp == 0)) {
-               return (NULL);
-       }
-
-again:
-       while (*cp == ' ' || *cp == '\t')
-               cp++;
-       if (*cp == '\0') {
-               int c;
-
-               c = getc(fconfig);
-               (void) ungetc(c, fconfig);
-               if (c == ' ' || c == '\t')
-                       cp = bb_get_chomped_line_from_file(fconfig);
-                       if (cp != NULL)
-                               goto again;
-               *cpp = NULL;
-               return NULL;
-       }
-       start = cp;
-       while (*cp && *cp != ' ' && *cp != '\t')
-               cp++;
-       if (*cp != '\0')
-               *cp++ = '\0';
-       *cpp = cp;
-       return (start);
-}
-
-static char *newstr(char *cp)
-{
-       cp = strdup(cp ? cp : "");
-       if (cp)
-               return(cp);
-
-       syslog_err_and_discard_dg(SOCK_STREAM, "strdup: %m");
-}
-
-
 static struct servtab *getconfigent(void)
 {
        static struct servtab serv;
        struct servtab *sep = &serv;
        int argc;
        char *cp = NULL;
-       char *arg;
+       char *cp_ptr;
+       char *cp_ptr_ptr = NULL;
+
 more:
-       do {
-               if (feof(fconfig)) {
-                       return ((struct servtab *)0);
-               }
+       free(cp);
+       cp = bb_get_chomped_line_from_file(fconfig);
+       if (feof(fconfig)) {
                free(cp);
-               cp = bb_get_chomped_line_from_file(fconfig);
-       } while ((cp == NULL) || (*cp == '#'));
+               return (NULL);
+       }
+       if ((cp == NULL) || (*cp == '#')) {
+               goto more;
+       }
+       printf("line is %s\n", cp);
 
-       memset((char *)sep, 0, sizeof *sep);
-       sep->se_service = newstr(skip(&cp));
-       arg = skip(&cp);
-       if (arg == NULL) {
+       cp_ptr = strtok_r(cp, " \t", &cp_ptr_ptr);
+       if (cp_ptr == NULL) {
+               printf("error\n");
+               /* Error */
                goto more;
        }
+       sep->se_service = bb_xstrdup(cp_ptr);
 
-       if (strcmp(arg, "stream") == 0)
+       cp_ptr = strtok_r(NULL, " \t", &cp_ptr_ptr);
+       if (cp_ptr == NULL) {
+               printf("error\n");
+               /* Error */
+               goto more;
+       }
+       if (strcmp(cp_ptr, "stream") == 0)
                sep->se_socktype = SOCK_STREAM;
-       else if (strcmp(arg, "dgram") == 0)
+       else if (strcmp(cp_ptr, "dgram") == 0)
                sep->se_socktype = SOCK_DGRAM;
-       else if (strcmp(arg, "rdm") == 0)
+       else if (strcmp(cp_ptr, "rdm") == 0)
                sep->se_socktype = SOCK_RDM;
-       else if (strcmp(arg, "seqpacket") == 0)
+       else if (strcmp(cp_ptr, "seqpacket") == 0)
                sep->se_socktype = SOCK_SEQPACKET;
-       else if (strcmp(arg, "raw") == 0)
+       else if (strcmp(cp_ptr, "raw") == 0)
                sep->se_socktype = SOCK_RAW;
        else
                sep->se_socktype = -1;
 
-       sep->se_proto = newstr(skip(&cp));
-       if (strcmp(sep->se_proto, "unix") == 0) {
+       cp_ptr = strtok_r(NULL, " \t", &cp_ptr_ptr);
+       if (cp_ptr == NULL) {
+               printf("error\n");
+               /* error */
+               goto more;
+       }
+       if (strcmp(cp_ptr, "unix") == 0) {
                sep->se_family = AF_UNIX;
        } else {
-               sep->se_family = AF_INET;
-               if (strncmp(sep->se_proto, "rpc/", 4) == 0) {
+               if (strncmp(cp_ptr, "rpc/", 4) == 0) {
                        syslog(LOG_ERR, "%s: rpc services not suported",
                            sep->se_service);
                        goto more;
                }
+               sep->se_family = AF_INET;
        }
-       arg = skip(&cp);
-       if (arg == NULL) {
+       sep->se_proto = bb_xstrdup(cp_ptr);
+
+       cp_ptr = strtok_r(NULL, " \t", &cp_ptr_ptr);
+       if (cp_ptr == NULL) {
+               printf("error\n");
+               /* error */
                goto more;
        }
        {
-               char    *s = strchr(arg, '.');
+               char *s = strchr(cp_ptr, '.');
                if (s) {
                        *s++ = '\0';
                        sep->se_max = atoi(s);
                } else
                        sep->se_max = TOOMANY;
        }
-       sep->se_wait = strcmp(arg, "wait") == 0;
-       sep->se_user = newstr(skip(&cp));
-       sep->se_group = strchr(sep->se_user, '.');
-       if (sep->se_group) {
-               *sep->se_group++ = '\0';
+       sep->se_wait = strcmp(cp_ptr, "wait") == 0;
+
+       cp_ptr = strtok_r(NULL, " \t", &cp_ptr_ptr);
+       if (cp_ptr == NULL) {
+               printf("error\n");
+               /* error */
+               goto more;
+       }
+       {
+               char *cp_ptr2 = strchr(cp_ptr, '.');
+               if (cp_ptr2) {
+                       *cp_ptr2++ = '\0';
+                       sep->se_group = bb_xstrdup(cp_ptr2);
+               }
        }
-       sep->se_server = newstr(skip(&cp));
-       if (strcmp(sep->se_server, "internal") == 0) {
+       sep->se_user = bb_xstrdup(cp_ptr);
+
+       cp_ptr = strtok_r(NULL, " \t", &cp_ptr_ptr);
+       if (cp_ptr == NULL) {
+               printf("error\n");
+               /* error */
+               goto more;
+       }
+       if (strcmp(cp_ptr, "internal") == 0) {
 #ifdef INETD_FEATURE_ENABLED
                const struct biltin *bi;
 
@@ -405,16 +399,14 @@ more:
                        }
                }
                if (bi->bi_service == 0) {
-                       syslog(LOG_ERR, "internal service %s unknown",
-                               sep->se_service);
+                       syslog(LOG_ERR, "internal service %s unknown", sep->se_service);
                        goto more;
                }
                sep->se_bi = bi;
                sep->se_wait = bi->bi_wait;
 #else
-               syslog(LOG_ERR, "internal service %s unknown",
-                               sep->se_service);
-                       goto more;
+               syslog(LOG_ERR, "internal service %s unknown", cp_ptr);
+               goto more;
 #endif
        }
 #ifdef INETD_FEATURE_ENABLED
@@ -422,16 +414,19 @@ more:
                sep->se_bi = NULL;
        }
 #endif
+       sep->se_server = bb_xstrdup(cp_ptr);
+
        argc = 0;
-       for (arg = skip(&cp); cp && arg; arg = skip(&cp)) {
+       while ((cp_ptr = strtok_r(NULL, " \t", &cp_ptr_ptr)) != NULL) {
                if (argc < MAXARGV) {
-                       sep->se_argv[argc++] = newstr(arg);
+                       sep->se_argv[argc++] = cp_ptr;
                }
        }
        while (argc <= MAXARGV) {
                sep->se_argv[argc++] = NULL;
        }
 
+       free(cp);
        return (sep);
 }