128 lines
3.9 KiB
Diff
128 lines
3.9 KiB
Diff
This patch reinstates fallback code when the 'prlimit64' system call is
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missing by reverting the relevant part of this upstream commit:
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commit 695d7d138eda449678a1650a8b8b58181033353f
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Author: Joseph Myers <joseph@codesourcery.com>
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Date: Tue May 9 14:05:09 2017 +0000
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Assume prlimit64 is available.
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The fallback code is useful on systems that lack 'prlimit64', such as the
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2.6.32-on-steroid kernel found on RHEL 6:
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<https://lists.gnu.org/archive/html/guix-devel/2018-03/msg00349.html>
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diff --git a/sysdeps/unix/sysv/linux/getrlimit64.c b/sysdeps/unix/sysv/linux/getrlimit64.c
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index 37c173286f..56af3c0646 100644
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--- b/sysdeps/unix/sysv/linux/getrlimit64.c
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+++ a/sysdeps/unix/sysv/linux/getrlimit64.c
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@@ -35,7 +35,40 @@
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int
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__getrlimit64 (enum __rlimit_resource resource, struct rlimit64 *rlimits)
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{
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- return INLINE_SYSCALL_CALL (prlimit64, 0, resource, NULL, rlimits);
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+#ifdef __NR_prlimit64
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+ int res = INLINE_SYSCALL_CALL (prlimit64, 0, resource, NULL, rlimits);
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+ if (res == 0 || errno != ENOSYS)
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+ return res;
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+#endif
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+
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+/* The fallback code only makes sense if the platform supports either
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+ __NR_ugetrlimit and/or __NR_getrlimit. */
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+#if defined (__NR_ugetrlimit) || defined (__NR_getrlimit)
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+# ifndef __NR_ugetrlimit
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+# define __NR_ugetrlimit __NR_getrlimit
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+# endif
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+# if __RLIM_T_MATCHES_RLIM64_T
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+# define rlimits32 (*rlimits)
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+# else
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+ struct rlimit rlimits32;
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+# endif
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+
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+ if (INLINE_SYSCALL_CALL (ugetrlimit, resource, &rlimits32) < 0)
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+ return -1;
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+
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+# if !__RLIM_T_MATCHES_RLIM64_T
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+ if (rlimits32.rlim_cur == RLIM_INFINITY)
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+ rlimits->rlim_cur = RLIM64_INFINITY;
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+ else
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+ rlimits->rlim_cur = rlimits32.rlim_cur;
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+ if (rlimits32.rlim_max == RLIM_INFINITY)
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+ rlimits->rlim_max = RLIM64_INFINITY;
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+ else
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+ rlimits->rlim_max = rlimits32.rlim_max;
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+# endif /* !__RLIM_T_MATCHES_RLIM64_T */
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+#endif /* defined (__NR_ugetrlimit) || defined (__NR_getrlimit) */
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+
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+ return 0;
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}
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libc_hidden_def (__getrlimit64)
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diff --git a/sysdeps/unix/sysv/linux/setrlimit.c b/sysdeps/unix/sysv/linux/setrlimit.c
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index 01812ac355..8773c78236 100644
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--- b/sysdeps/unix/sysv/linux/setrlimit.c
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+++ a/sysdeps/unix/sysv/linux/setrlimit.c
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@@ -34,6 +34,7 @@
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int
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__setrlimit (enum __rlimit_resource resource, const struct rlimit *rlim)
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{
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+# ifdef __NR_prlimit64
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struct rlimit64 rlim64;
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if (rlim->rlim_cur == RLIM_INFINITY)
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@@ -45,7 +46,11 @@
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else
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rlim64.rlim_max = rlim->rlim_max;
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- return INLINE_SYSCALL_CALL (prlimit64, 0, resource, &rlim64, NULL);
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+ int res = INLINE_SYSCALL_CALL (prlimit64, 0, resource, &rlim64, NULL);
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+ if (res == 0 || errno != ENOSYS)
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+ return res;
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+# endif
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+ return INLINE_SYSCALL_CALL (setrlimit, resource, rlim);
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}
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# if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
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diff --git a/sysdeps/unix/sysv/linux/setrlimit64.c b/sysdeps/unix/sysv/linux/setrlimit64.c
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index 2dd129d99e..db1960fc18 100644
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--- b/sysdeps/unix/sysv/linux/setrlimit64.c
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+++ a/sysdeps/unix/sysv/linux/setrlimit64.c
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@@ -36,7 +36,36 @@
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int
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__setrlimit64 (enum __rlimit_resource resource, const struct rlimit64 *rlimits)
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{
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- return INLINE_SYSCALL_CALL (prlimit64, 0, resource, rlimits, NULL);
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+ int res;
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+
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+#ifdef __NR_prlimit64
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+ res = INLINE_SYSCALL_CALL (prlimit64, 0, resource, rlimits, NULL);
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+ if (res == 0 || errno != ENOSYS)
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+ return res;
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+#endif
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+
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+/* The fallback code only makes sense if the platform supports
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+ __NR_setrlimit. */
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+#ifdef __NR_setrlimit
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+# if !__RLIM_T_MATCHES_RLIM64_T
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+ struct rlimit rlimits32;
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+
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+ if (rlimits->rlim_cur >= RLIM_INFINITY)
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+ rlimits32.rlim_cur = RLIM_INFINITY;
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+ else
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+ rlimits32.rlim_cur = rlimits->rlim_cur;
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+ if (rlimits->rlim_max >= RLIM_INFINITY)
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+ rlimits32.rlim_max = RLIM_INFINITY;
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+ else
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+ rlimits32.rlim_max = rlimits->rlim_max;
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+# else
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+# define rlimits32 (*rlimits)
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+# endif
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+
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+ res = INLINE_SYSCALL_CALL (setrlimit, resource, &rlimits32);
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+#endif
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+
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+ return res;
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}
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weak_alias (__setrlimit64, setrlimit64)
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