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56 lines
1.9 KiB
56 lines
1.9 KiB
13 years ago
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module.exports = uidNumber
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// This module calls into bin/npm-get-uid-gid.js, which sets the
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// uid and gid to the supplied argument, in order to find out their
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// numeric value. This can't be done in the main node process,
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// because otherwise npm would be running as that user.
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var exec = require("./exec.js")
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, path = require("path")
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, log = require("./log.js")
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, constants = require("constants")
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, npm = require("../npm.js")
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, uidSupport = process.getuid && process.setuid
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, uidCache = {}
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, gidCache = {}
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function uidNumber (uid, gid, cb) {
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if (!uidSupport || npm.config.get("unsafe-perm")) return cb()
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if (typeof cb !== "function") cb = gid, gid = null
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if (typeof cb !== "function") cb = uid, uid = null
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if (gid == null) gid = process.getgid()
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if (uid == null) uid = process.getuid()
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if (!isNaN(gid)) gid = +gid
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if (!isNaN(uid)) uid = +uid
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if (uidCache[uid]) uid = uidCache[uid]
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if (gidCache[gid]) gid = gidCache[gid]
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if (typeof gid === "number" && typeof uid === "number") {
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return cb(null, uid, gid)
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}
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var getter = path.join(__dirname, "..", "..", "bin", "npm-get-uid-gid.js")
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return exec( process.execPath, [getter, uid, gid], process.env, false
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, null, process.getuid(), process.getgid()
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, function (er, code, out, err) {
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if (er) return log.er(cb, "Could not get uid/gid "+err)(er)
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log.silly(out, "output from getuid/gid")
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out = JSON.parse(out+"")
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if (out.error) {
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if (!npm.config.get("unsafe-perm")) {
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var er = new Error(out.error)
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er.errno = out.errno
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return cb(er)
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} else {
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return cb(null, +process.getuid(), +process.getgid())
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}
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}
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if (isNaN(out.uid) || isNaN(out.gid)) return cb(new Error(
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"Could not get uid/gid: "+JSON.stringify(out)))
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uidCache[uid] = out.uid
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uidCache[gid] = out.gid
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cb(null, out.uid, out.gid)
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})
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}
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