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https://github.com/jart/cosmopolitan.git
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6f7d0cb1c3
This makes breaking changes to add underscores to many non-standard function names provided by the c library. MODE=tiny is now tinier and we now use smaller locks that are better for tiny apps in this mode. Some headers have been renamed to be in the same folder as the build package, so it'll be easier to know which build dependency is needed. Certain old misguided interfaces have been removed. Intel intrinsics headers are now listed in libc/isystem (but not in the amalgamation) to help further improve open source compatibility. Header complexity has also been reduced. Lastly, more shell scripts are now available.
73 lines
2.9 KiB
C
73 lines
2.9 KiB
C
#if 0
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/*─────────────────────────────────────────────────────────────────╗
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│ To the extent possible under law, Justine Tunney has waived │
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│ all copyright and related or neighboring rights to this file, │
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│ as it is written in the following disclaimers: │
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│ • http://unlicense.org/ │
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│ • http://creativecommons.org/publicdomain/zero/1.0/ │
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╚─────────────────────────────────────────────────────────────────*/
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#endif
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#include "libc/calls/calls.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/calls/struct/rlimit.h"
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#include "libc/errno.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/log/color.internal.h"
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#include "libc/macros.internal.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/rlim.h"
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#include "libc/sysv/consts/rlimit.h"
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/**
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* @fileoverview tool for printing and changing system resource limits
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*
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* This is what you do if you want to not accidentally bomb your system
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* with runaway code. If you haven't accidentally bombed your UNIX
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* system before then you're not pushing it hard enough.
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*/
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static void SetLimit(int resource, uint64_t soft, uint64_t hard) {
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struct rlimit old;
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struct rlimit lim = {soft, hard};
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if (resource == 127) return;
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if (setrlimit(resource, &lim) == -1) {
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if (!getrlimit(resource, &old)) {
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lim.rlim_max = MIN(hard, old.rlim_max);
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lim.rlim_cur = MIN(soft, old.rlim_max);
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if (!setrlimit(resource, &lim)) {
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fprintf(stderr, "%sNOTE: SETRLIMIT(%s) DOWNGRADED TO {%,ld, %,ld}\n",
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DescribeRlimitName(resource), lim.rlim_cur, lim.rlim_max);
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return;
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}
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}
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fprintf(stderr, "ERROR: SETRLIMIT(%s, %,ld, %,ld) FAILED %m%n",
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DescribeRlimitName(resource), soft, hard);
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exit(1);
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}
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}
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int main(int argc, char *argv[]) {
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int i, rc;
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char rlnbuf[20];
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struct rlimit rlim;
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// // example of how you might change the limits
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// SetLimit(RLIMIT_CPU, 3, 33);
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// SetLimit(RLIMIT_NPROC, 4, 128);
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// SetLimit(RLIMIT_NOFILE, 32, 128);
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// SetLimit(RLIMIT_SIGPENDING, 16, 1024);
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// SetLimit(RLIMIT_AS, 8 * 1024 * 1024, 1l * 1024 * 1024 * 1024);
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// SetLimit(RLIMIT_RSS, 8 * 1024 * 1024, 1l * 1024 * 1024 * 1024);
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// SetLimit(RLIMIT_DATA, 8 * 1024 * 1024, 1l * 1024 * 1024 * 1024);
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// SetLimit(RLIMIT_FSIZE, 8 * 1000 * 1000, 1l * 1000 * 1000 * 1000);
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for (i = 0; i < RLIM_NLIMITS; ++i) {
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rc = getrlimit(i, &rlim);
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printf("SETRLIMIT(%-20s, %,16ld, %,16ld) → %d %s\n",
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(DescribeRlimitName)(rlnbuf, i), rlim.rlim_cur, rlim.rlim_max, rc,
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!rc ? "" : strerror(errno));
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}
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return 0;
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}
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