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Parses /proc/net/tcp only once.

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* procopenfiles.c: (get_all_sockets),
	(glibtop_get_proc_open_files_s): Parses /proc/net/tcp only once.
This commit is contained in:
Benoît Dejean
2005-01-12 22:39:31 +00:00
parent fee415ecd8
commit ab40c94db3
2 changed files with 63 additions and 25 deletions
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83
sysdeps/linux/procopenfiles.c
View File

@@ -49,41 +49,49 @@ glibtop_init_proc_open_files_s (glibtop *server)
}
static void
get_socket_endpoint(char *buf, int *prmtport, int s)
struct SocketEndPoint
{
FILE *f;
char host[GLIBTOP_OPEN_DEST_HOST_LEN + 1];
int port;
int sock;
};
static GArray* get_all_sockets()
{
GArray *socks;
FILE *tcp;
char line[1024];
buf[0] = '\0';
*prmtport = 0;
socks = g_array_new(FALSE, FALSE, sizeof(struct SocketEndPoint));
f = fopen("/proc/net/tcp", "r");
if(!f)
return;
g_return_val_if_fail((tcp = fopen("/proc/net/tcp", "r")), socks);
if(!fgets(line, sizeof line, f)) goto eof;
if(!fgets(line, sizeof line, tcp)) goto eof;
while(fgets(line, sizeof line, f))
while(fgets(line, sizeof line, tcp))
{
unsigned int rmt;
int sock = -42;
struct SocketEndPoint sep;
unsigned addr;
sscanf(line, "%*d: %*x:%*x %8x:%4x %*x %*x:%*x %*x:%*x %*d %*d %*d %d",
&rmt, prmtport, &sock);
if(sscanf(line, "%*d: %*x:%*x %8x:%4x %*x %*x:%*x %*x:%*x %*d %*d %*d %d",
&addr, &sep.port, &sep.sock) != 3)
continue;
if(sock == s)
{
inet_ntop(AF_INET, &rmt, buf, GLIBTOP_OPEN_DEST_HOST_LEN);
break;
}
if(!inet_ntop(AF_INET, &addr, sep.host, sizeof sep.host))
continue;
g_array_append_val(socks, sep);
}
eof:
fclose(f);
fclose(tcp);
return socks;
}
/* Provides detailed information about a process' open files */
glibtop_open_files_entry *
@@ -91,8 +99,8 @@ glibtop_get_proc_open_files_s (glibtop *server, glibtop_proc_open_files *buf, pi
{
char fn [BUFSIZ];
GArray *entries;
GArray *socks = NULL;
struct dirent *direntry;
int rv;
DIR *dir;
glibtop_init_s (&server, GLIBTOP_SYSDEPS_PROC_OPEN_FILES, 0);
@@ -108,6 +116,7 @@ glibtop_get_proc_open_files_s (glibtop *server, glibtop_proc_open_files *buf, pi
while((direntry = readdir(dir))) {
char tgt [BUFSIZ];
int rv;
glibtop_open_files_entry entry = {0};
@@ -125,12 +134,33 @@ glibtop_get_proc_open_files_s (glibtop *server, glibtop_proc_open_files *buf, pi
if(g_str_has_prefix(tgt, "socket:["))
{
unsigned i;
int sockfd;
if(!socks)
socks = get_all_sockets();
entry.type = GLIBTOP_FILE_TYPE_INETSOCKET;
sockfd = atoi(tgt + 8);
get_socket_endpoint(entry.info.sock.dest_host,
&(entry.info.sock.dest_port),
sockfd);
for(i = 0; i < socks->len; ++i)
{
const struct SocketEndPoint *sep;
sep = & g_array_index(socks,
struct SocketEndPoint,
i);
if(sep->sock == sockfd)
{
entry.info.sock.dest_port = sep->port;
memcpy(entry.info.sock.dest_host,
sep->host,
sizeof sep->host);
break;
}
}
}
else if(g_str_has_prefix(tgt, "pipe:["))
{
@@ -147,6 +177,9 @@ glibtop_get_proc_open_files_s (glibtop *server, glibtop_proc_open_files *buf, pi
closedir (dir);
if(socks)
g_array_free(socks, TRUE);
buf->flags = _glibtop_sysdeps_proc_open_files;
buf->number = entries->len;
buf->size = sizeof(glibtop_open_files_entry);