Squidが立ち上がらない

Question

brew install squid
brew services run squid
==> Successfully started `squid` (label: homebrew.mxcl.squid)
ps aux|grep squid

の出力結果がgrepのみで、squidが立ち上がりません。runをstartとしても、brewを使わずsquid startとしても同じです。

以下、squid -Xの出力結果の最後の方です。

2019/05/10 12:22:07.366| 24,8| SBuf.cc(886) cow: SBuf47 new size:6
2019/05/10 12:22:07.366| 24,8| SBuf.cc(857) reAlloc: SBuf47 new size: 6
2019/05/10 12:22:07.366| 24,9| MemBlob.cc(56) MemBlob: constructed, this=0x7fd20f407210 id=blob596 reserveSize=6
2019/05/10 12:22:07.366| 24,8| MemBlob.cc(101) memAlloc: blob596 memAlloc: requested=6, received=40
2019/05/10 12:22:07.366| 24,9| MemBlob.cc(82) ~MemBlob: destructed, this=0x7fd20f407340 id=blob594 capacity=40 size=6
2019/05/10 12:22:07.366| 24,7| SBuf.cc(865) reAlloc: SBuf47 new store capacity: 40
2019/05/10 12:22:07.366| 24,7| SBuf.cc(160) rawSpace: reserving 1 for SBuf112
2019/05/10 12:22:07.366| 24,8| SBuf.cc(886) cow: SBuf112 new size:6
2019/05/10 12:22:07.366| 24,8| SBuf.cc(857) reAlloc: SBuf112 new size: 6
2019/05/10 12:22:07.366| 24,9| MemBlob.cc(56) MemBlob: constructed, this=0x7fd20f407340 id=blob597 reserveSize=6
2019/05/10 12:22:07.366| 24,8| MemBlob.cc(101) memAlloc: blob597 memAlloc: requested=6, received=40
2019/05/10 12:22:07.366| 24,9| MemBlob.cc(82) ~MemBlob: destructed, this=0x7fd20f407270 id=blob595 capacity=40 size=6
2019/05/10 12:22:07.366| 24,7| SBuf.cc(865) reAlloc: SBuf112 new store capacity: 40
2019/05/10 12:22:07.366| 28,3| InnerNode.cc(57) lineParse: looking for ACL ssl::certUntrusted
2019/05/10 12:22:07.366| 28,9| Acl.cc(96) FindByName: ACL::FindByName 'ssl::certUntrusted'
2019/05/10 12:22:07.366| 45,9| cbdata.cc(256) cbdataInternalAlloc: Allocating 0x7fd20f702b78
2019/05/10 12:22:07.366| 24,7| SBuf.cc(160) rawSpace: reserving 1 for SBuf47
2019/05/10 12:22:07.366| 24,8| SBuf.cc(886) cow: SBuf47 new size:6
2019/05/10 12:22:07.366| 24,8| SBuf.cc(857) reAlloc: SBuf47 new size: 6
2019/05/10 12:22:07.366| 24,9| MemBlob.cc(56) MemBlob: constructed, this=0x7fd20f407270 id=blob598 reserveSize=6
2019/05/10 12:22:07.366| 24,8| MemBlob.cc(101) memAlloc: blob598 memAlloc: requested=6, received=40
2019/05/10 12:22:07.366| 24,9| MemBlob.cc(82) ~MemBlob: destructed, this=0x7fd20f407210 id=blob596 capacity=40 size=6
2019/05/10 12:22:07.366| 24,7| SBuf.cc(865) reAlloc: SBuf47 new store capacity: 40
2019/05/10 12:22:07.366| 24,7| SBuf.cc(160) rawSpace: reserving 1 for SBuf112
2019/05/10 12:22:07.366| 24,8| SBuf.cc(886) cow: SBuf112 new size:6
2019/05/10 12:22:07.366| 24,8| SBuf.cc(857) reAlloc: SBuf112 new size: 6
2019/05/10 12:22:07.366| 24,9| MemBlob.cc(56) MemBlob: constructed, this=0x7fd20f407210 id=blob599 reserveSize=6
2019/05/10 12:22:07.366| 24,8| MemBlob.cc(101) memAlloc: blob599 memAlloc: requested=6, received=40
2019/05/10 12:22:07.366| 24,9| MemBlob.cc(82) ~MemBlob: destructed, this=0x7fd20f407340 id=blob597 capacity=40 size=6
2019/05/10 12:22:07.366| 24,7| SBuf.cc(865) reAlloc: SBuf112 new store capacity: 40
2019/05/10 12:22:07.366| 28,3| InnerNode.cc(57) lineParse: looking for ACL ssl::certSelfSigned
2019/05/10 12:22:07.366| 28,9| Acl.cc(96) FindByName: ACL::FindByName 'ssl::certSelfSigned'
2019/05/10 12:22:07.366| 45,9| cbdata.cc(256) cbdataInternalAlloc: Allocating 0x7fd20f702d78
2019/05/10 12:22:07.366| 24,7| SBuf.cc(160) rawSpace: reserving 1 for SBuf47
2019/05/10 12:22:07.366| 24,8| SBuf.cc(886) cow: SBuf47 new size:6
2019/05/10 12:22:07.366| 24,8| SBuf.cc(857) reAlloc: SBuf47 new size: 6
2019/05/10 12:22:07.366| 24,9| MemBlob.cc(56) MemBlob: constructed, this=0x7fd20f407340 id=blob600 reserveSize=6
2019/05/10 12:22:07.366| 24,8| MemBlob.cc(101) memAlloc: blob600 memAlloc: requested=6, received=40
2019/05/10 12:22:07.366| 24,9| MemBlob.cc(82) ~MemBlob: destructed, this=0x7fd20f407270 id=blob598 capacity=40 size=6
2019/05/10 12:22:07.366| 24,7| SBuf.cc(865) reAlloc: SBuf47 new store capacity: 40
2019/05/10 12:22:07.366| 24,7| SBuf.cc(160) rawSpace: reserving 1 for SBuf112
2019/05/10 12:22:07.366| 24,8| SBuf.cc(886) cow: SBuf112 new size:6
2019/05/10 12:22:07.366| 24,8| SBuf.cc(857) reAlloc: SBuf112 new size: 6
2019/05/10 12:22:07.367| 24,9| MemBlob.cc(56) MemBlob: constructed, this=0x7fd20f407270 id=blob601 reserveSize=6
2019/05/10 12:22:07.367| 24,8| MemBlob.cc(101) memAlloc: blob601 memAlloc: requested=6, received=40
2019/05/10 12:22:07.367| 24,9| MemBlob.cc(82) ~MemBlob: destructed, this=0x7fd20f407210 id=blob599 capacity=40 size=6
2019/05/10 12:22:07.367| 24,7| SBuf.cc(865) reAlloc: SBuf112 new store capacity: 40
2019/05/10 12:22:07.367| 28,3| InnerNode.cc(57) lineParse: looking for ACL all
2019/05/10 12:22:07.367| 28,9| Acl.cc(96) FindByName: ACL::FindByName 'all'
2019/05/10 12:22:07.367| 45,9| cbdata.cc(256) cbdataInternalAlloc: Allocating 0x7fd20f702f58
Segmentation fault: 11

• OS：macOS Mojave 10.14.4
• Squid Cache: Version 4.5

詳しくないので、何がなんだかです。
不足情報ありましたら教えてください。
よろしくお願いいたします。

Answer 1

access_log /var/log/squid/access.log squid
cache_log /var/log/squid/cache.log
cache_store_log /var/log/squid/store.log

ログの書き出し設定をしたところパーミッションエラーが出ていたので、
上記3ファイルを作成・所有者を自分に設定したら立ち上がりました。
過去にいろいろいじった過程でファイルを削除してしまっていたのだと思います。