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netstat: in error message, report filename and line number

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where we see problematic data

   text    data     bss     dec     hex filename
 778456     832    7344  786632   c00c8 busybox_old
 778394     832    7344  786570   c008a busybox_unstripped
This commit is contained in:
Denis Vlasenko 2007-12-26 21:49:33 +00:00
parent c03e872112
commit ddc865fb0d
1 changed files with 23 additions and 22 deletions
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45
networking/netstat.c
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@ -148,7 +148,7 @@ static char *ip_port_str(struct sockaddr *addr, int port, const char *proto, int
return host_port;
}
static void tcp_do_one(int lnr, char *line)
static int tcp_do_one(int lnr, char *line)
{
char local_addr[64], rem_addr[64];
char more[512];
@ -161,7 +161,7 @@ static void tcp_do_one(int lnr, char *line)
unsigned long rxq, txq, time_len, retr, inode;
if (lnr == 0)
return;
return 0;
more[0] = '\0';
num = sscanf(line,
@ -171,8 +171,7 @@ static void tcp_do_one(int lnr, char *line)
&txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more);
if (num < 10) {
bb_error_msg("warning, got bogus tcp line");
return;
return 1; /* error */
}
if (strlen(local_addr) > 8) {
@ -199,9 +198,10 @@ static void tcp_do_one(int lnr, char *line)
free(l);
free(r);
}
return 0;
}
static void udp_do_one(int lnr, char *line)
static int udp_do_one(int lnr, char *line)
{
char local_addr[64], rem_addr[64];
const char *state_str;
@ -215,7 +215,7 @@ static void udp_do_one(int lnr, char *line)
unsigned long rxq, txq, time_len, retr, inode;
if (lnr == 0)
return;
return 0;
more[0] = '\0';
num = sscanf(line,
@ -236,8 +236,7 @@ static void udp_do_one(int lnr, char *line)
}
if (num < 10) {
bb_error_msg("warning, got bogus udp line");
return;
return 1; /* error */
}
switch (state) {
case TCP_ESTABLISHED:
@ -281,9 +280,10 @@ static void udp_do_one(int lnr, char *line)
free(r);
}
}
return 0;
}
static void raw_do_one(int lnr, char *line)
static int raw_do_one(int lnr, char *line)
{
char local_addr[64], rem_addr[64];
char more[512];
@ -296,7 +296,7 @@ static void raw_do_one(int lnr, char *line)
unsigned long rxq, txq, time_len, retr, inode;
if (lnr == 0)
return;
return 0;
more[0] = '\0';
num = sscanf(line,
@ -316,8 +316,7 @@ static void raw_do_one(int lnr, char *line)
}
if (num < 10) {
bb_error_msg("warning, got bogus raw line");
return;
return 1; /* error */
}
{
@ -337,9 +336,10 @@ static void raw_do_one(int lnr, char *line)
free(r);
}
}
return 0;
}
static void unix_do_one(int nr, char *line)
static int unix_do_one(int nr, char *line)
{
unsigned long refcnt, proto, unix_flags;
unsigned long inode;
@ -352,7 +352,7 @@ static void unix_do_one(int nr, char *line)
/* TODO: currently we stop at first NUL byte. Is it a problem? */
if (nr == 0)
return; /* skip header */
return 0; /* skip header */
*strchrnul(line, '\n') = '\0';
@ -360,22 +360,21 @@ static void unix_do_one(int nr, char *line)
* Other users report long lines filled by NUL bytes.
* (those ^@ are NUL bytes too). We see them as empty lines. */
if (!line[0])
return;
return 0;
path_ofs = 0; /* paranoia */
num = sscanf(line, "%p: %lX %lX %lX %X %X %lu %n",
&d, &refcnt, &proto, &unix_flags, &type, &state, &inode, &path_ofs);
if (num < 7) {
bb_error_msg("got bogus unix line '%s'", line);
return;
return 1; /* error */
}
if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) != (NETSTAT_LISTENING|NETSTAT_CONNECTED)) {
if ((state == SS_UNCONNECTED) && (unix_flags & SO_ACCEPTCON)) {
if (!(flags & NETSTAT_LISTENING))
return;
return 0;
} else {
if (!(flags & NETSTAT_CONNECTED))
return;
return 0;
}
}
@ -447,6 +446,7 @@ static void unix_do_one(int nr, char *line)
printf("%-5s %-6ld %-11s %-10s %-13s %6lu %s\n",
ss_proto, refcnt, ss_flags, ss_type, ss_state, inode,
line + path_ofs);
return 0;
}
#define _PATH_PROCNET_UDP "/proc/net/udp"
@ -457,7 +457,7 @@ static void unix_do_one(int nr, char *line)
#define _PATH_PROCNET_RAW6 "/proc/net/raw6"
#define _PATH_PROCNET_UNIX "/proc/net/unix"
static void do_info(const char *file, const char *name, void (*proc)(int, char *))
static void do_info(const char *file, const char *name, int (*proc)(int, char *))
{
int lnr;
FILE *procinfo;
@ -468,14 +468,15 @@ static void do_info(const char *file, const char *name, void (*proc)(int, char *
if (errno != ENOENT) {
bb_simple_perror_msg(file);
} else {
bb_error_msg("no support for '%s' on this system", name);
bb_error_msg("no kernel support for %s", name);
}
return;
}
lnr = 0;
/* Why? because xmalloc_fgets_str doesn't stop on NULs */
while ((buffer = xmalloc_fgets_str(procinfo, "\n")) != NULL) {
(proc)(lnr++, buffer);
if (proc(lnr++, buffer))
bb_error_msg("%s: bogus data on line %d", file, lnr);
free(buffer);
}
fclose(procinfo);