/*
* check_open_files -- verify open files match recorded open files
*/
static void
check_open_files()
{
int dirfd;
DIR *dirp = NULL;
struct dirent *dp;
if ((dirfd = open("/proc/self/fd", O_RDONLY)) < 0 ||
(dirp = fdopendir(dirfd)) == NULL)
FATAL("!/proc/self/fd");
while ((dp = readdir(dirp)) != NULL) {
int fdnum;
char fdfile[PATH_MAX];
ssize_t cc;
if (*dp->d_name == '.')
continue;
if ((cc = readlinkat(dirfd, dp->d_name, fdfile, PATH_MAX)) < 0)
FATAL("!readlinkat: /proc/self/fd/%s", dp->d_name);
fdfile[cc] = '\0';
fdnum = atoi(dp->d_name);
if (dirfd == fdnum)
continue;
open_file_remove(Fd_lut, fdnum, fdfile);
}
closedir(dirp);
open_file_walk(Fd_lut);
if (Fd_errcount)
FATAL("open file list changed between START() and DONE()");
open_file_free(Fd_lut);
}
static void file_close(struct fd_info *fdi)
{
struct file_info *file;
struct fd_info *fdp;
struct fd_info **prev;
/* Close file */
CHECK(close(fdi->fd) != -1);
/* Remove struct fd_info */
open_file_remove(fdi);
file = fdi->file;
prev = &file->fds;
for (fdp = file->fds; fdp; fdp = fdp->next) {
if (fdp == fdi) {
*prev = fdi->next;
free(fdi);
if (file->deleted && !file->fds) {
/* Closing deleted file */
struct write_info *w, *next;
w = file->writes;
while (w) {
next = w->next;
free(w);
w = next;
}
free(file->name);
free(file);
}
return;
}
prev = &fdp->next;
}
CHECK(0); /* Didn't find struct fd_info */
}
/*
* open_file_remove -- find exact match & remove it from lut
*
* prints error if exact match not found, increments Fd_errcount
*/
static void
open_file_remove(struct fd_lut *root, int fdnum, const char *fdfile)
{
if (root == NULL) {
ERR("unexpected open file: fd %d => \"%s\"", fdnum, fdfile);
Fd_errcount++;
} else if (root->fdnum == fdnum) {
if (root->fdfile == NULL) {
ERR("open file dup: fd %d => \"%s\"", fdnum, fdfile);
Fd_errcount++;
} else if (strcmp(root->fdfile, fdfile) == 0) {
/* found exact match */
FREE(root->fdfile);
root->fdfile = NULL;
} else {
ERR("open file changed: fd %d was \"%s\" now \"%s\"",
fdnum, root->fdfile, fdfile);
Fd_errcount++;
}
} else if (root->fdnum < fdnum)
open_file_remove(root->left, fdnum, fdfile);
else
open_file_remove(root->right, fdnum, fdfile);
}
