mirror of
https://github.com/fluencelabs/musl
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5235a2a5a4
this allows the full range of 64-bit limit arguments even on 32-bit systems. fallback to the old syscalls on old kernels that don't support prlimit.
43 lines
842 B
C
43 lines
842 B
C
#include <sys/resource.h>
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#include <errno.h>
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#include "syscall.h"
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#include "libc.h"
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#define MIN(a, b) ((a)<(b) ? (a) : (b))
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int __setrlimit(int resource, const struct rlimit *rlim)
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{
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unsigned long k_rlim[2];
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int ret = __syscall(SYS_prlimit64, 0, resource, rlim, 0);
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if (ret != -ENOSYS) return ret;
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k_rlim[0] = MIN(rlim->rlim_cur, -1UL);
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k_rlim[1] = MIN(rlim->rlim_max, -1UL);
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return __syscall(SYS_setrlimit, resource, k_rlim);
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}
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struct ctx {
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const struct rlimit *rlim;
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int res;
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int err;
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};
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static void do_setrlimit(void *p)
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{
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struct ctx *c = p;
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if (c->err) return;
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c->err = -__setrlimit(c->res, c->rlim);
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}
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int setrlimit(int resource, const struct rlimit *rlim)
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{
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struct ctx c = { .res = resource, .rlim = rlim };
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__synccall(do_setrlimit, &c);
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if (c.err) {
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errno = c.err;
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return -1;
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}
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return 0;
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}
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LFS64(setrlimit);
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