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D1345.id2797.diff
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Index: usr.bin/jot/jot.c
===================================================================
--- usr.bin/jot/jot.c
+++ usr.bin/jot/jot.c
@@ -47,8 +47,10 @@
* Author: John Kunze, Office of Comp. Affairs, UCB
*/
+#include <sys/capsicum.h>
#include <ctype.h>
#include <err.h>
+#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdint.h>
@@ -55,6 +57,7 @@
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
+#include <termios.h>
#include <time.h>
#include <unistd.h>
@@ -89,6 +92,7 @@
int
main(int argc, char **argv)
{
+ cap_rights_t rights;
bool have_format = false;
bool infinity = false;
bool nofinalnl = false;
@@ -104,7 +108,20 @@
double x, y;
long i;
long reps = REPS_DEF;
+ unsigned long cmd;
+ fclose(stdin);
+ cap_rights_init(&rights, CAP_WRITE, CAP_FSTAT, CAP_IOCTL);
+ if (cap_rights_limit(STDOUT_FILENO, &rights) < 0 && errno != ENOSYS)
+ err(1, "unable to limit rights for stdout");
+ cmd = TIOCGETA;
+ if (cap_ioctls_limit(STDOUT_FILENO, &cmd, 1) < 0 && errno != ENOSYS)
+ err(1, "unable to limit ioctls for stdout");
+ cap_rights_init(&rights, CAP_WRITE);
+ if (cap_rights_limit(STDERR_FILENO, &rights) < 0 && errno != ENOSYS)
+ err(1, "unable to limit rights for stderr");
+ if (cap_enter() < 0 && errno != ENOSYS)
+ err(1, "unable to enter capability mode");
while ((ch = getopt(argc, argv, "b:cnp:rs:w:")) != -1)
switch (ch) {
case 'b':
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