/**
* Walk in directoty like "/proc/123/fd/"
*/
void prg_cache_load_sub(DIR * dir, const char *path_process,
const char *path_fd)
{
char path[PATH_MAX];
char lname[30];
char finbuf[PROGNAME_WIDTH];
unsigned long inode;
struct dirent *file;
while ((file = readdir(dir)) != NULL) {
#ifdef HAVE_STRUCT_DIRENT_D_TYPE
if (file->d_type != DT_LNK)
continue;
#endif
/* read link of "/proc/123/fd/FILENAME" */
if (!secure_snprintf
(path, sizeof(path), "%s/%s", path_fd, file->d_name))
continue;
if (!secure_readlink(path, lname, sizeof(lname)))
continue;
/*
* extract inode number from name like "socket:[12345]"
* or "[0000]:12345"
*/
if (extract_type_1_socket_inode(lname, &inode) < 0)
if (extract_type_2_socket_inode(lname, &inode) < 0)
continue;
/* get exec fullpath */
if (!secure_snprintf
(path, sizeof(path), "%s/exe", path_process))
continue;
if (!secure_readlink(path, finbuf, sizeof(finbuf)))
continue;
/* add item to the cache */
prg_cache_add(inode, finbuf);
}
}
static void prg_cache_load(void)
{
char line[LINE_MAX],eacces=0;
int procfdlen,fd,cmdllen,lnamelen;
char lname[30],cmdlbuf[512],finbuf[PROGNAME_WIDTH];
long inode;
const char *cs,*cmdlp;
DIR *dirproc=NULL,*dirfd=NULL;
struct dirent *direproc,*direfd;
if (prg_cache_loaded) return;
prg_cache_loaded=1;
cmdlbuf[sizeof(cmdlbuf)-1]='\0';
if (!(dirproc=opendir(PATH_PROC))) goto fail;
while (errno=0,direproc=readdir(dirproc)) {
for (cs=direproc->d_name;*cs;cs++)
if (!isdigit(*cs))
break;
if (*cs)
continue;
procfdlen=snprintf(line,sizeof(line),PATH_PROC_X_FD,direproc->d_name);
if (procfdlen<=0 || procfdlen>=sizeof(line)-5)
continue;
errno=0;
dirfd=opendir(line);
if (! dirfd) {
if (errno==EACCES)
eacces=1;
continue;
}
line[procfdlen] = '/';
cmdlp = NULL;
while ((direfd = readdir(dirfd))) {
if (procfdlen+1+strlen(direfd->d_name)+1>sizeof(line))
continue;
memcpy(line + procfdlen - PATH_FD_SUFFl, PATH_FD_SUFF "/",
PATH_FD_SUFFl+1);
strcpy(line + procfdlen + 1, direfd->d_name);
lnamelen=readlink(line,lname,sizeof(lname)-1);
lname[lnamelen] = '\0'; /*make it a null-terminated string*/
extract_type_1_socket_inode(lname, &inode);
if (inode < 0) extract_type_2_socket_inode(lname, &inode);
if (inode < 0) continue;
if (!cmdlp) {
if (procfdlen - PATH_FD_SUFFl + PATH_CMDLINEl >=
sizeof(line) - 5)
continue;
strcpy(line + procfdlen-PATH_FD_SUFFl, PATH_CMDLINE);
fd = open(line, O_RDONLY);
if (fd < 0)
continue;
cmdllen = read(fd, cmdlbuf, sizeof(cmdlbuf) - 1);
if (close(fd))
continue;
if (cmdllen == -1)
continue;
if (cmdllen < sizeof(cmdlbuf) - 1)
cmdlbuf[cmdllen]='\0';
if ((cmdlp = strrchr(cmdlbuf, '/')))
cmdlp++;
else
cmdlp = cmdlbuf;
}
snprintf(finbuf, sizeof(finbuf), "%s/%s", direproc->d_name, cmdlp);
prg_cache_add(inode, finbuf);
}
closedir(dirfd);
dirfd = NULL;
}
if (dirproc)
closedir(dirproc);
if (dirfd)
closedir(dirfd);
if (!eacces)
return;
if (prg_cache_loaded == 1) {
fail:
fprintf(stderr,"(No info could be read for \"-p\": geteuid()=%d but you should be root.)\n",
geteuid());
}
else
fprintf(stderr, "(Not all processes could be identified, non-owned process info\n"
" will not be shown, you would have to be root to see it all.)\n");
}