3bc2317c6
Denys Vlasenko
2017-08-09
Subject
Update NOFORK_NOEXEC.lst
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NOFORK_NOEXEC.lst+12 -4
| @@ -39,6 +39,14 @@ for users to keep it waiting for many minutes, whereas running "rm" in shell | |
| is very typical, and speeding up this common use via NOEXEC is useful. | |
| IOW: rm is "interactive", but not "longterm". | |
| + | Interesting example of an applet which can be NOFORK but if not, |
| + | then should not be NOEXEC, is "usleep". As NOFORK, it amount to simply |
| + | nanosleep()ing in the calling program (usually shell). No memory wasted. |
| + | But if ran as NOEXEC, it would create a potentially long-term process, |
| + | which would be taking more memory because it did not exec |
| + | and did not free much of the copied memory of the parent |
| + | (COW helps with this only as long as parent doesn't modify its memory). |
| + | |
| [ - NOFORK | |
| [[ - NOFORK | |
| @@ -181,8 +189,8 @@ iostat - longterm: "iostat 1" runs indefinitely | |
| ip - noexec candidate | |
| ipaddr - noexec candidate | |
| ipcalc - noexec. ipcalc -h talks to network | |
| - | ipcrm - noexec candidate |
| - | ipcs - noexec candidate |
| + | ipcrm - noexec |
| + | ipcs - noexec |
| iplink - noexec candidate | |
| ipneigh - noexec candidate | |
| iproute - noexec candidate | |
| @@ -327,7 +335,7 @@ showkey - interactive, longterm | |
| shred - runner | |
| shuf - noexec. runner | |
| slattach - longterm (may sleep forever), uses bb_common_bufsiz1 | |
| - | sleep - runner, longterm |
| + | sleep - longterm. Could be nofork, if not the problem of "killall sleep" not killing it. |
| smemcap - runner | |
| softlimit - noexec. spawner | |
| sort - noexec. runner | |
| @@ -397,7 +405,7 @@ unxz - runner | |
| unzip - runner | |
| uptime - noexec. nofork candidate(is getutxent ok?) | |
| users - noexec. nofork candidate(is getutxent ok?) | |
| - | usleep - NOFORK |
| + | usleep - NOFORK. But what about "killall usleep"? |
| uudecode - runner | |
| uuencode - runner | |
| vconfig - noexec. leaks: xsocket+ioctl_or_perror_and_die | |