From a05665240a4060e6a167e8cf5745fbec7cf11e1c Mon Sep 17 00:00:00 2001
From: Doug MacEachern <dougm@hyperic.com>
Date: Tue, 6 Jun 2006 04:28:33 +0000
Subject: [PATCH] this code has been folded in long ago

---
 exp/linux_pid_portmap.c | 211 ----------------------------------------
 1 file changed, 211 deletions(-)
 delete mode 100644 exp/linux_pid_portmap.c

diff --git a/exp/linux_pid_portmap.c b/exp/linux_pid_portmap.c
deleted file mode 100644
index d501404e..00000000
--- a/exp/linux_pid_portmap.c
+++ /dev/null
@@ -1,211 +0,0 @@
-#include <stdio.h>
-#include <ctype.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#include <dirent.h>
-#include <sys/stat.h>
-
-/*
- * eam can provide per-process measurements, but at the moment requires
- * a pid.  something we cannot store in the database.  however, we could
- * store a service port in the database (e.g. 8009 for tomcat ajp) and 
- * figure out the pid given that.
- *
- * it is possible via /proc/net/tcp and /proc/$pid/fd/
- * to map a tcp port to one (or more if forked) process id(s).
- * caveats: expensive to scan /proc/$pid/fd
- *          must own process or be root to read /proc/$pid/fd
- * brutal to provide similar functionality on other platforms,
- * tho possible (see lsof).
- */
-
-static char *sigar_skip_token(char *p)
-{
-    while (isspace(*p)) p++;
-    while (*p && !isspace(*p)) p++;
-    return p;
-}
-
-static char *sigar_skip_multiple_token(char *p, int count)
-{
-    int i;
-    
-    for (i = 0; i < count; i++) {
-        p = sigar_skip_token(p);
-    }
-
-    return p;
-}
-
-static int get_process_ppid(char *pid, char *buf, int buflen)
-{
-    FILE *fp;
-    char buffer[1024], *ptr, *ptr2;
-    sprintf(buffer, "/proc/%s/stat", pid);
-
-    if (!(fp = fopen(buffer, "r"))) {
-        return errno;
-    }
-
-    ptr = fgets(buffer, sizeof(buffer), fp);
-    fclose(fp);
-
-    ptr = sigar_skip_multiple_token(ptr, 3);
-
-    while (isspace(*ptr)) {
-        ++ptr;
-    }
-
-    ptr2 = strchr(ptr, ' ');
-    *ptr2 = '\0';
-
-    strncpy(buf, ptr2, buflen);
-    buf[buflen] = '\0';
-
-    return 0;
-}
-
-typedef struct {
-    int port;
-    int inode;
-    int uid;
-    int pid;
-    char name[1024];
-} portmap_t;
-
-static int portmap_lookup_inode(portmap_t *map) {
-    FILE *fp;
-    char buffer[8192], *ptr;
-    int inode = 0;
-
-    if ((fp = fopen("/proc/net/tcp", "r")) < 0) {
-        return -1;
-    }
-
-    fgets(buffer, sizeof(buffer), fp); /* skip header */
-
-    while ((ptr = fgets(buffer, sizeof(buffer), fp))) {
-        ptr = sigar_skip_token(ptr);
-
-        if ((ptr = strchr(ptr, ':'))) {
-            unsigned long port = strtoul(++ptr, &ptr, 16);
-
-            if (!(map->port == (port & 0xffff))) {
-                continue;
-            }
-        }
-
-        ptr = sigar_skip_multiple_token(ptr, 5);
-        map->uid = strtoul(ptr, &ptr, 10);
-
-        ptr = sigar_skip_token(ptr);
-
-        inode = map->inode = strtoul(ptr, &ptr, 10);
-
-        break;
-    }
-
-    fclose(fp);
-
-    return inode ? 0 : ENOENT;
-}
-
-static int portmap_lookup_pid(portmap_t *map, char *pid) {
-    DIR *dirp;
-    struct dirent *dp;
-    char fname[1024], dname[1024];
-
-    map->pid = -1;
-
-    sprintf(dname, "/proc/%s/fd", pid);
-
-    if (!(dirp = opendir(dname))) {
-        return errno;
-    }
-
-    while ((dp = readdir(dirp))) {
-        struct stat statbuf;
-
-        if (!isdigit(*dp->d_name)) {
-            continue;
-        }
-
-        sprintf(fname, "%s/%s", dname, dp->d_name);
-        //printf("check %s\n", fname);
-        if (stat(fname, &statbuf)) {
-            continue;
-        }
-
-        if (statbuf.st_ino == map->inode) {
-            map->pid = atoi(pid);
-            break;
-        }
-    }
-    
-    closedir(dirp);
-
-    return map->pid == -1 ? ENOENT : 0;
-}
-
-static int portmap_lookup_pid_scan(portmap_t *map) {
-    DIR *dirp;
-    struct dirent *dp;
-
-    char dname[1024];
-
-    if (!(dirp = opendir("/proc"))) {
-        return -1;
-    }
-
-    map->pid = -1;
-
-    while ((dp = readdir(dirp))) {
-        struct stat statbuf;
-
-        if (!isdigit(*dp->d_name)) {
-            continue;
-        }
-
-        sprintf(dname, "/proc/%s", dp->d_name);
-        if (stat(dname, &statbuf)) {
-            continue;
-        }
-
-        if (!(statbuf.st_uid == map->uid)) {
-            continue;
-        }
-
-        if (portmap_lookup_pid(map, dp->d_name) == 0) {
-#if 0
-            char *pid = dp->d_name;
-            char ppid[16];
-            get_process_ppid(pid, ppid, sizeof(ppid));
-#endif
-            //break;
-            printf("%s has inode %d\n", dp->d_name, map->inode);
-        }
-    }
-
-    closedir(dirp);
-
-    return map->pid == -1 ? ENOENT : 0;
-}
-
-int main(int argc, char **argv) {
-    portmap_t map;
-
-    if (argc != 2) {
-        printf("usage: %s port\n", argv[0]);
-    }
-
-    map.port = atoi(argv[1]);
-
-    if (portmap_lookup_inode(&map) == 0) {
-        if (portmap_lookup_pid_scan(&map) == 0) {
-            printf("inode=%d, pid=%d\n", map.inode, map.pid);
-        }
-    }
-
-    return 1;
-}