diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/os/user/lookup_unix.go | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/src/os/user/lookup_unix.go b/src/os/user/lookup_unix.go index f4f603ea87..e8a1eb1bbf 100644 --- a/src/os/user/lookup_unix.go +++ b/src/os/user/lookup_unix.go @@ -9,7 +9,6 @@ package user import ( "fmt" - "runtime" "strconv" "strings" "syscall" @@ -55,17 +54,15 @@ func lookupUnix(uid int, username string, lookupByName bool) (*User, error) { var pwd C.struct_passwd var result *C.struct_passwd - var bufSize C.long - if runtime.GOOS == "dragonfly" || runtime.GOOS == "freebsd" { - // DragonFly and FreeBSD do not have _SC_GETPW_R_SIZE_MAX - // and just return -1. So just use the same - // size that Linux returns. + bufSize := C.sysconf(C._SC_GETPW_R_SIZE_MAX) + if bufSize == -1 { + // DragonFly and FreeBSD do not have _SC_GETPW_R_SIZE_MAX. + // Additionally, not all Linux systems have it, either. For + // example, the musl libc returns -1. bufSize = 1024 - } else { - bufSize = C.sysconf(C._SC_GETPW_R_SIZE_MAX) - if bufSize <= 0 || bufSize > 1<<20 { - return nil, fmt.Errorf("user: unreasonable _SC_GETPW_R_SIZE_MAX of %d", bufSize) - } + } + if bufSize <= 0 || bufSize > 1<<20 { + return nil, fmt.Errorf("user: unreasonable _SC_GETPW_R_SIZE_MAX of %d", bufSize) } buf := C.malloc(C.size_t(bufSize)) defer C.free(buf) |