Clean up code in inc.c

Clean up the confusing use of a variable 'i' in inc.c.
The case where it was being used as 'an error occurred
which means we should not truncate the mailspool' is now
called 'incerr' and merged with the equivalent 'p' variable
used in the POP-specific code. Cases where it was being
used as a random temporary are still called 'i' but now
declared with a much more restricted scope.
This fixes a compilation warning for some compilers.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/uip/inc.c b/uip/inc.c
index f461dd8..8f99b7b 100644 (file)
--- a/uip/inc.c
+++ b/uip/inc.c
@@ -198,8 +198,9 @@ main (int argc, char **argv)
 {
     int chgflag = 1, trnflag = 1;
     int noisy = 1, width = 0;
-    int i, hghnum = 0, msgnum = 0;
+    int hghnum = 0, msgnum = 0;
     int sasl = 0;
+    int incerr = 0; /* <0 if inc hits an error which means it should not truncate mailspool */
     char *cp, *maildir = NULL, *folder = NULL;
     char *format = NULL, *form = NULL;
     char *host = NULL, *port = NULL, *user = NULL, *proxy = NULL;
@@ -212,7 +213,7 @@ main (int argc, char **argv)
     char *maildir_copy = NULL; /* copy of mail directory because the static gets overwritten */
 
 #ifdef POP
-    int nmsgs, nbytes, p = 0;
+    int nmsgs, nbytes;
     char *pass = NULL;
     char *MAILHOST_env_variable;
 #endif
@@ -545,6 +546,7 @@ go_to_it:
     DROPGROUPPRIVS();
 
     if (audfile) {
+       int i;
        if ((i = stat (audfile, &st)) == NOTOK)
            advise (NULL, "Creating Receive-Audit: %s", audfile);
        if ((aud = fopen (audfile, "a")) == NULL)
@@ -565,6 +567,7 @@ go_to_it:
 
 #ifdef MHE
     if (context_find ("mhe")) {
+       int i;
        cp = concat (maildir, "/++", NULL);
        i = stat (cp, &st);
        if ((mhe = fopen (cp, "a")) == NULL)
@@ -589,6 +592,7 @@ go_to_it:
      * Get the mail from a POP server
      */
     if (inc_type == INC_POP) {
+       int i;
        if (packfile) {
            packfile = path (packfile, TFILE);
            if (stat (packfile, &st) == NOTOK) {
@@ -648,7 +652,7 @@ go_to_it:
                    adios (cp, "write error on");
                fseek (pf, 0L, SEEK_SET);
            }
-           switch (p = scan (pf, msgnum, 0, nfs, width,
+           switch (incerr = scan (pf, msgnum, 0, nfs, width,
                              packfile ? 0 : msgnum == mp->hghmsg + 1 && chgflag,
                              1, NULL, stop - start, noisy)) {
            case SCNEOF: 
@@ -724,7 +728,7 @@ go_to_it:
     if (inc_type == INC_FILE) {
        m_unknown (in);         /* the MAGIC invocation... */
        hghnum = msgnum = mp->hghmsg;
-       for (i = 0;;) {
+       for (;;) {
            /*
             * Check if we need to allocate more space for message status.
             * If so, then add space for an additional 100 messages.
@@ -732,7 +736,7 @@ go_to_it:
            if (msgnum >= mp->hghoff
                && !(mp = folder_realloc (mp, mp->lowoff, mp->hghoff + 100))) {
                advise (NULL, "unable to allocate folder storage");
-               i = NOTOK;
+               incerr = NOTOK;
                break;
            }
 
@@ -750,7 +754,7 @@ go_to_it:
            newmsg = folder_addmsg(mp, tmpfilenam);
 #endif
            /* create scanline for new message */
-           switch (i = scan (in, msgnum + 1, msgnum + 1, nfs, width,
+           switch (incerr = scan (in, msgnum + 1, msgnum + 1, nfs, width,
                              msgnum == hghnum && chgflag, 1, NULL, 0L, noisy)) {
            case SCNFAT:
            case SCNEOF: 
@@ -767,7 +771,7 @@ go_to_it:
                break;
 
            default: 
-               advise (NULL, "BUG in %s, scan() botch (%d)", invo_name, i);
+               advise (NULL, "BUG in %s, scan() botch (%d)", invo_name, incerr);
                break;
 
            case SCNMSG:
@@ -799,15 +803,14 @@ go_to_it:
                mp->msgflags |= SEQMOD;
                continue;
            }
+           /* If we get here there was some sort of error from scan(),
+            * so stop processing anything more from the spool.
+            */
            break;
        }
     }
 
-#ifdef POP
-    if (p < 0) {               /* error */
-#else
-    if (i < 0) {               /* error */
-#endif
+    if (incerr < 0) {          /* error */
        if (locked) {
             GETGROUPPRIVS();      /* Be sure we can unlock mail file */
             (void) lkfclose (in, newmail); in = NULL;
@@ -842,8 +845,9 @@ go_to_it:
            if (stat (newmail, &st) != NOTOK && s1.st_mtime != st.st_mtime)
                advise (NULL, "new messages have arrived!\007");
            else {
-               if ((i = creat (newmail, 0600)) != NOTOK)
-                   close (i);
+               int newfd;
+               if ((newfd = creat (newmail, 0600)) != NOTOK)
+                   close (newfd);
                else
                    admonish (newmail, "error zero'ing");
                unlink(map_name(newmail));