42 lines
1.4 KiB
Diff
42 lines
1.4 KiB
Diff
Fix for when arp_disp_2() is called without opt_n set. If there is a DNS lookup, an
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entry is added to /proc/net/arp after fopen(), resulting in a duplicate entry.
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--- net-tools-1.60/arp.c.fgets 2005-12-10 14:52:04.000000000 -0500
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+++ net-tools-1.60/arp.c 2005-12-11 00:15:59.000000000 -0500
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@@ -528,7 +528,7 @@ static int arp_show(char *name)
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int type, flags;
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FILE *fp;
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char *hostname;
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- int num, entries = 0, showed = 0;
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+ int num, entries, showed = 0;
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host[0] = '\0';
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@@ -546,18 +546,21 @@ static int arp_show(char *name)
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perror(_PATH_PROCNET_ARP);
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return (-1);
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}
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+ /* Count number of entries, in case file changes */
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+ for (entries = 0; fgets(line, sizeof(line), fp); entries++);
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+ entries--;
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+ fseek (fp, 0L, SEEK_SET);
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/* Bypass header -- read until newline */
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if (fgets(line, sizeof(line), fp) != (char *) NULL) {
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strcpy(mask, "-");
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strcpy(dev, "-");
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/* Read the ARP cache entries. */
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- for (; fgets(line, sizeof(line), fp);) {
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- num = sscanf(line, "%s 0x%x 0x%x %100s %100s %100s\n",
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- ip, &type, &flags, hwa, mask, dev);
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- if (num < 4)
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+ for (num = 0; num < entries; num++) {
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+ fgets(line, sizeof(line), fp);
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+ if (sscanf(line, "%s 0x%x 0x%x %100s %100s %100s\n",
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+ ip, &type, &flags, hwa, mask, dev) < 4)
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break;
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- entries++;
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/* if the user specified hw-type differs, skip it */
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if (hw_set && (type != hw->type))
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continue;
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