fish-shell/tests/checks/fds.fish
Fabian Homborg c96a07dc96 Revert "Prevent redirecting internal processes to file descriptors above 2"
FDs are inherited, and redirecting those is harmless, and forbidding
that is worse than allowing all.

Fixes #7769.

This reverts commit 11a373f121.
2021-03-03 22:26:33 +01:00

79 lines
1.3 KiB
Fish

# RUN: %fish -C "set helper %fish_test_helper" %s
# Check that we don't leave stray FDs.
$helper print_fds
# CHECK: 0 1 2
$helper print_fds 0>&-
# CHECK: 1 2
$helper print_fds 0>&- 2>&-
# CHECK: 1
false | $helper print_fds 0>&-
# CHECK: 0 1 2
$helper print_fds </dev/null
# CHECK: 0 1 2
$helper print_fds </dev/null
# CHECK: 0 1 2
$helper print_fds 3</dev/null
# CHECK: 0 1 2 3
# This attempts to trip a case where the file opened in fish
# has the same fd as the redirection. In this case, the dup2
# does not clear the CLO_EXEC bit.
$helper print_fds 4</dev/null
# CHECK: 0 1 2 4
$helper print_fds 5</dev/null
# CHECK: 0 1 2 5
$helper print_fds 6</dev/null
# CHECK: 0 1 2 6
$helper print_fds 7</dev/null
# CHECK: 0 1 2 7
$helper print_fds 8</dev/null
# CHECK: 0 1 2 8
$helper print_fds 9</dev/null
# CHECK: 0 1 2 9
$helper print_fds 10</dev/null
# CHECK: 0 1 2 10
$helper print_fds 11</dev/null
# CHECK: 0 1 2 11
$helper print_fds 12</dev/null
# CHECK: 0 1 2 12
$helper print_fds 13</dev/null
# CHECK: 0 1 2 13
$helper print_fds 14</dev/null
# CHECK: 0 1 2 14
$helper print_fds 15</dev/null
# CHECK: 0 1 2 15
$helper print_fds 16</dev/null
# CHECK: 0 1 2 16
$helper print_fds 17</dev/null
# CHECK: 0 1 2 17
$helper print_fds 18</dev/null
# CHECK: 0 1 2 18
$helper print_fds 19</dev/null
# CHECK: 0 1 2 19
$helper print_fds 20</dev/null
# CHECK: 0 1 2 20