diff options
Diffstat (limited to 'libc/sysdeps/linux/common/getrlimit.c')
| -rw-r--r-- | libc/sysdeps/linux/common/getrlimit.c | 56 |
1 files changed, 48 insertions, 8 deletions
diff --git a/libc/sysdeps/linux/common/getrlimit.c b/libc/sysdeps/linux/common/getrlimit.c index 26d3d2946..46726fcbd 100644 --- a/libc/sysdeps/linux/common/getrlimit.c +++ b/libc/sysdeps/linux/common/getrlimit.c @@ -9,10 +9,11 @@ #include <sys/syscall.h> #include <sys/resource.h> #include <bits/wordsize.h> +#include <stddef.h> // needed for NULL to be defined /* Only wrap getrlimit if the new ugetrlimit is not present and getrlimit sucks */ -#if defined __NR_ugetrlimit +#if defined(__NR_ugetrlimit) /* just call ugetrlimit() */ # define __NR___syscall_ugetrlimit __NR_ugetrlimit @@ -23,17 +24,58 @@ int getrlimit(__rlimit_resource_t resource, struct rlimit *rlimits) { return __syscall_ugetrlimit(resource, rlimits); } +libc_hidden_def(getrlimit) + +#elif defined(__NR_prlimit64) +/* Use prlimit64 if present, the prlimit64 syscall is free from a back + compatibility stuff for an old getrlimit */ + +# if __WORDSIZE == 32 && !defined(__USE_FILE_OFFSET64) +/* If struct rlimit has 64-bit fields (if __WORDSIZE == 64 or __USE_FILE_OFFSET64 + is defined), then use getrlimit as an alias to getrlimit64, see getrlimit64.c */ +int getrlimit(__rlimit_resource_t resource, struct rlimit *rlimits) +{ + struct rlimit64 rlimits64; + int res = INLINE_SYSCALL (prlimit64, 4, 0, resource, NULL, &rlimits64); + + if (res == 0) { + /* If the syscall succeeds but the values do not fit into a + rlimit structure set EOVERFLOW errno and retrun -1. */ + rlimits->rlim_cur = rlimits64.rlim_cur; + if (rlimits64.rlim_cur != rlimits->rlim_cur) { + if (rlimits64.rlim_cur != RLIM64_INFINITY) { + __set_errno(EOVERFLOW); + return -1; + } + rlimits->rlim_cur = RLIM_INFINITY; + } -#elif !defined(__UCLIBC_HANDLE_OLDER_RLIMIT__) + rlimits->rlim_max = rlimits64.rlim_max; + if (rlimits64.rlim_max != rlimits->rlim_max) { + if (rlimits64.rlim_max != RLIM64_INFINITY) { + __set_errno(EOVERFLOW); + return -1; + } + rlimits->rlim_max = RLIM_INFINITY; + } + } + return res; +} +libc_hidden_def(getrlimit) +# endif + +#else + +# if !defined(__UCLIBC_HANDLE_OLDER_RLIMIT__) /* We don't need to wrap getrlimit() */ _syscall2(int, getrlimit, __rlimit_resource_t, resource, struct rlimit *, rlim) -#else +# else /* we have to handle old style getrlimit() */ -# define __NR___syscall_getrlimit __NR_getrlimit +# define __NR___syscall_getrlimit __NR_getrlimit static __always_inline _syscall2(int, __syscall_getrlimit, int, resource, struct rlimit *, rlim) @@ -54,9 +96,7 @@ int getrlimit(__rlimit_resource_t resource, struct rlimit *rlimits) rlimits->rlim_max = RLIM_INFINITY; return result; } -#endif -libc_hidden_def(getrlimit) +# endif -#if __WORDSIZE == 64 -strong_alias_untyped(getrlimit, getrlimit64) +libc_hidden_def(getrlimit) #endif |