1507
1512
return ret_errno;
1512
* Based on the example in the GNU LibC manual chapter 13.13 "File
1513
* Descriptor Flags".
1514
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
1516
__attribute__((warn_unused_result))
1517
static int set_cloexec_flag(int fd){
1518
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
1519
/* If reading the flags failed, return error indication now. */
1523
/* Store modified flag word in the descriptor. */
1524
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
1527
#endif /* not O_CLOEXEC */
1529
1515
__attribute__((nonnull))
1530
1516
void run_network_hooks(const char *mode, const char *interface,
1531
1517
const float delay){
1532
1518
struct dirent **direntries;
1533
if(hookdir_fd == -1){
1534
hookdir_fd = open(hookdir, O_RDONLY |
1537
#else /* not O_CLOEXEC */
1539
#endif /* not O_CLOEXEC */
1541
if(hookdir_fd == -1){
1542
if(errno == ENOENT){
1544
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1545
" found\n", hookdir);
1548
perror_plus("open");
1553
if(set_cloexec_flag(hookdir_fd) < 0){
1554
perror_plus("set_cloexec_flag");
1555
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1556
perror_plus("close");
1562
#endif /* not O_CLOEXEC */
1565
#if __GLIBC_PREREQ(2, 15)
1566
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1567
runnable_hook, alphasort);
1568
#else /* not __GLIBC_PREREQ(2, 15) */
1569
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1571
#endif /* not __GLIBC_PREREQ(2, 15) */
1572
#else /* not __GLIBC__ */
1573
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1575
#endif /* not __GLIBC__ */
1519
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1576
1521
if(numhooks == -1){
1577
perror_plus("scandir");
1580
struct dirent *direntry;
1582
int devnull = open("/dev/null", O_RDONLY);
1583
for(int i = 0; i < numhooks; i++){
1584
direntry = direntries[i];
1586
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1522
if(errno == ENOENT){
1524
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1525
" found\n", hookdir);
1528
perror_plus("scandir");
1589
pid_t hook_pid = fork();
1592
/* Raise privileges */
1593
if(raise_privileges_permanently() != 0){
1594
perror_plus("Failed to raise privileges");
1601
perror_plus("setgid");
1604
/* Reset supplementary groups */
1606
ret = setgroups(0, NULL);
1608
perror_plus("setgroups");
1611
ret = dup2(devnull, STDIN_FILENO);
1613
perror_plus("dup2(devnull, STDIN_FILENO)");
1616
ret = close(devnull);
1618
perror_plus("close");
1621
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1623
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1626
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1628
perror_plus("setenv");
1631
ret = setenv("DEVICE", interface, 1);
1633
perror_plus("setenv");
1636
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1638
perror_plus("setenv");
1641
ret = setenv("MODE", mode, 1);
1643
perror_plus("setenv");
1647
ret = asprintf(&delaystring, "%f", (double)delay);
1531
struct dirent *direntry;
1533
int devnull = open("/dev/null", O_RDONLY);
1534
for(int i = 0; i < numhooks; i++){
1535
direntry = direntries[i];
1536
char *fullname = NULL;
1537
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1649
1539
perror_plus("asprintf");
1652
ret = setenv("DELAY", delaystring, 1);
1543
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1546
pid_t hook_pid = fork();
1549
/* Raise privileges */
1550
if(raise_privileges_permanently() != 0){
1551
perror_plus("Failed to raise privileges");
1558
perror_plus("setgid");
1561
/* Reset supplementary groups */
1563
ret = setgroups(0, NULL);
1565
perror_plus("setgroups");
1568
ret = dup2(devnull, STDIN_FILENO);
1570
perror_plus("dup2(devnull, STDIN_FILENO)");
1573
ret = close(devnull);
1575
perror_plus("close");
1578
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1580
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1583
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1585
perror_plus("setenv");
1588
ret = setenv("DEVICE", interface, 1);
1590
perror_plus("setenv");
1593
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1595
perror_plus("setenv");
1598
ret = setenv("MODE", mode, 1);
1600
perror_plus("setenv");
1604
ret = asprintf(&delaystring, "%f", (double)delay);
1606
perror_plus("asprintf");
1609
ret = setenv("DELAY", delaystring, 1);
1612
perror_plus("setenv");
1654
1615
free(delaystring);
1655
perror_plus("setenv");
1659
if(connect_to != NULL){
1660
ret = setenv("CONNECT", connect_to, 1);
1662
perror_plus("setenv");
1666
if(fexecve(hookdir_fd, (char *const [])
1667
{ direntry->d_name, NULL }, environ) == -1){
1668
perror_plus("fexecve");
1669
_exit(EXIT_FAILURE);
1673
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1674
perror_plus("waitpid");
1677
if(WIFEXITED(status)){
1678
if(WEXITSTATUS(status) != 0){
1679
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1680
" with status %d\n", direntry->d_name,
1681
WEXITSTATUS(status));
1684
} else if(WIFSIGNALED(status)){
1685
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1686
" signal %d\n", direntry->d_name,
1616
if(connect_to != NULL){
1617
ret = setenv("CONNECT", connect_to, 1);
1619
perror_plus("setenv");
1623
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1624
perror_plus("execl");
1625
_exit(EXIT_FAILURE);
1690
fprintf_plus(stderr, "Warning: network hook \"%s\""
1691
" crashed\n", direntry->d_name);
1696
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1700
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1701
perror_plus("close");
1629
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1630
perror_plus("waitpid");
1634
if(WIFEXITED(status)){
1635
if(WEXITSTATUS(status) != 0){
1636
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1637
" with status %d\n", direntry->d_name,
1638
WEXITSTATUS(status));
1642
} else if(WIFSIGNALED(status)){
1643
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1644
" signal %d\n", direntry->d_name,
1649
fprintf_plus(stderr, "Warning: network hook \"%s\""
1650
" crashed\n", direntry->d_name);
1657
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1708
1665
__attribute__((nonnull, warn_unused_result))
2618
2572
/* Removes the GPGME temp directory and all files inside */
2619
2573
if(tempdir != NULL){
2620
2574
struct dirent **direntries = NULL;
2621
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY));
2622
if(tempdir_fd == -1){
2623
perror_plus("open");
2625
int numentries = scandir(tempdir, &direntries, notdotentries,
2628
for(int i = 0; i < numentries; i++){
2629
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2631
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2632
" \"%s\", 0): %s\n", tempdir,
2633
direntries[i]->d_name, strerror(errno));
2637
/* need to clean even if 0 because man page doesn't specify */
2639
if(numentries == -1){
2640
perror_plus("scandir");
2642
ret = rmdir(tempdir);
2643
if(ret == -1 and errno != ENOENT){
2644
perror_plus("rmdir");
2575
struct dirent *direntry = NULL;
2576
int numentries = scandir(tempdir, &direntries, notdotentries,
2579
for(int i = 0; i < numentries; i++){
2580
direntry = direntries[i];
2581
char *fullname = NULL;
2582
ret = asprintf(&fullname, "%s/%s", tempdir,
2585
perror_plus("asprintf");
2588
ret = remove(fullname);
2590
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2647
TEMP_FAILURE_RETRY(close(tempdir_fd));
2597
/* need to clean even if 0 because man page doesn't specify */
2599
if(numentries == -1){
2600
perror_plus("scandir");
2602
ret = rmdir(tempdir);
2603
if(ret == -1 and errno != ENOENT){
2604
perror_plus("rmdir");