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- --- a/tcpdump.c
- +++ b/tcpdump.c
- @@ -66,6 +66,7 @@ extern int SIZE_BUF;
- #include <stdlib.h>
- #include <string.h>
- #include <limits.h>
- +#include <ctype.h>
- #ifndef WIN32
- #include <sys/wait.h>
- #include <sys/resource.h>
- @@ -625,6 +626,7 @@ main(int argc, char **argv)
- #ifdef HAVE_PCAP_FINDALLDEVS
- pcap_if_t *devpointer;
- int devnum;
- + char *devp;
- #endif
- int status;
- #ifdef WIN32
- @@ -775,7 +777,8 @@ main(int argc, char **argv)
- * It can be useful on Windows, where more than
- * one interface can have the same name.
- */
- - if ((devnum = atoi(optarg)) != 0) {
- + for (devp = optarg; *devp && isdigit(*devp); devp++);
- + if ((!*devp || isspace(*devp)) && (devnum = atoi(optarg)) != 0) {
- if (devnum < 0)
- error("Invalid adapter index");
-
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