enable SO_KEEPALIVE for connected TCP sockets

Sockets may never receive notification of some link errors,
causing "git fetch" or similar processes to hang forever.
Enabling keepalive messages allows hung processes to error out
after a few minutes/hours depending on the keepalive settings of
the system.

This is a problem noticed when running non-interactive
cronjobs to mirror repositories using "git fetch".

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 file changed
tree: 0bdef533393b087b3fc6d560f57289d220a787c7
  1. block-sha1/
  2. builtin/
  3. compat/
  4. contrib/
  5. Documentation/
  6. git-gui/
  7. git_remote_helpers/
  8. gitk-git/
  9. gitweb/
  10. perl/
  11. po/
  12. ppc/
  13. t/
  14. templates/
  15. vcs-svn/
  16. xdiff/
  17. .gitattributes
  18. .gitignore
  19. .mailmap
  20. abspath.c
  21. aclocal.m4
  22. advice.c
  23. advice.h
  24. alias.c
  25. alloc.c
  26. archive-tar.c
  27. archive-zip.c
  28. archive.c
  29. archive.h
  30. attr.c
  31. attr.h
  32. base85.c
  33. bisect.c
  34. bisect.h
  35. blob.c
  36. blob.h
  37. branch.c
  38. branch.h
  39. builtin.h
  40. bundle.c
  41. bundle.h
  42. cache-tree.c
  43. cache-tree.h
  44. cache.h
  45. check-builtins.sh
  46. check-racy.c
  47. check_bindir
  48. color.c
  49. color.h
  50. combine-diff.c
  51. command-list.txt
  52. commit.c
  53. commit.h
  54. config.c
  55. config.mak.in
  56. configure.ac
  57. connect.c
  58. convert.c
  59. copy.c
  60. COPYING
  61. csum-file.c
  62. csum-file.h
  63. ctype.c
  64. daemon.c
  65. date.c
  66. decorate.c
  67. decorate.h
  68. delta.h
  69. diff-delta.c
  70. diff-lib.c
  71. diff-no-index.c
  72. diff.c
  73. diff.h
  74. diffcore-break.c
  75. diffcore-delta.c
  76. diffcore-order.c
  77. diffcore-pickaxe.c
  78. diffcore-rename.c
  79. diffcore.h
  80. dir.c
  81. dir.h
  82. editor.c
  83. entry.c
  84. environment.c
  85. exec_cmd.c
  86. exec_cmd.h
  87. fast-import.c
  88. fetch-pack.h
  89. fixup-builtins
  90. fsck.c
  91. fsck.h
  92. generate-cmdlist.sh
  93. gettext.c
  94. gettext.h
  95. git-add--interactive.perl
  96. git-am.sh
  97. git-archimport.perl
  98. git-bisect.sh
  99. git-compat-util.h
  100. git-cvsexportcommit.perl
  101. git-cvsimport.perl
  102. git-cvsserver.perl
  103. git-difftool--helper.sh
  104. git-difftool.perl
  105. git-filter-branch.sh
  106. git-instaweb.sh
  107. git-lost-found.sh
  108. git-merge-octopus.sh
  109. git-merge-one-file.sh
  110. git-merge-resolve.sh
  111. git-mergetool--lib.sh
  112. git-mergetool.sh
  113. git-parse-remote.sh
  114. git-pull.sh
  115. git-quiltimport.sh
  116. git-rebase--am.sh
  117. git-rebase--interactive.sh
  118. git-rebase--merge.sh
  119. git-rebase.sh
  120. git-relink.perl
  121. git-remote-testgit.py
  122. git-repack.sh
  123. git-request-pull.sh
  124. git-send-email.perl
  125. git-sh-i18n.sh
  126. git-sh-setup.sh
  127. git-stash.sh
  128. git-submodule.sh
  129. git-svn.perl
  130. GIT-VERSION-GEN
  131. git-web--browse.sh
  132. git.c
  133. git.spec.in
  134. graph.c
  135. graph.h
  136. grep.c
  137. grep.h
  138. hash.c
  139. hash.h
  140. help.c
  141. help.h
  142. hex.c
  143. http-backend.c
  144. http-fetch.c
  145. http-push.c
  146. http-walker.c
  147. http.c
  148. http.h
  149. ident.c
  150. imap-send.c
  151. INSTALL
  152. levenshtein.c
  153. levenshtein.h
  154. LGPL-2.1
  155. list-objects.c
  156. list-objects.h
  157. ll-merge.c
  158. ll-merge.h
  159. lockfile.c
  160. log-tree.c
  161. log-tree.h
  162. mailmap.c
  163. mailmap.h
  164. Makefile
  165. match-trees.c
  166. merge-file.c
  167. merge-file.h
  168. merge-recursive.c
  169. merge-recursive.h
  170. name-hash.c
  171. notes-cache.c
  172. notes-cache.h
  173. notes-merge.c
  174. notes-merge.h
  175. notes.c
  176. notes.h
  177. object.c
  178. object.h
  179. pack-check.c
  180. pack-refs.c
  181. pack-refs.h
  182. pack-revindex.c
  183. pack-revindex.h
  184. pack-write.c
  185. pack.h
  186. pager.c
  187. parse-options.c
  188. parse-options.h
  189. patch-delta.c
  190. patch-ids.c
  191. patch-ids.h
  192. path.c
  193. pkt-line.c
  194. pkt-line.h
  195. preload-index.c
  196. pretty.c
  197. progress.c
  198. progress.h
  199. quote.c
  200. quote.h
  201. reachable.c
  202. reachable.h
  203. read-cache.c
  204. README
  205. reflog-walk.c
  206. reflog-walk.h
  207. refs.c
  208. refs.h
  209. remote-curl.c
  210. remote.c
  211. remote.h
  212. replace_object.c
  213. rerere.c
  214. rerere.h
  215. resolve-undo.c
  216. resolve-undo.h
  217. revision.c
  218. revision.h
  219. run-command.c
  220. run-command.h
  221. send-pack.h
  222. server-info.c
  223. setup.c
  224. sh-i18n--envsubst.c
  225. sha1-array.c
  226. sha1-array.h
  227. sha1-lookup.c
  228. sha1-lookup.h
  229. sha1_file.c
  230. sha1_name.c
  231. shallow.c
  232. shell.c
  233. shortlog.h
  234. show-index.c
  235. sideband.c
  236. sideband.h
  237. sigchain.c
  238. sigchain.h
  239. strbuf.c
  240. strbuf.h
  241. string-list.c
  242. string-list.h
  243. submodule.c
  244. submodule.h
  245. symlinks.c
  246. tag.c
  247. tag.h
  248. tar.h
  249. test-chmtime.c
  250. test-ctype.c
  251. test-date.c
  252. test-delta.c
  253. test-dump-cache-tree.c
  254. test-genrandom.c
  255. test-index-version.c
  256. test-line-buffer.c
  257. test-match-trees.c
  258. test-mktemp.c
  259. test-obj-pool.c
  260. test-parse-options.c
  261. test-path-utils.c
  262. test-run-command.c
  263. test-sha1.c
  264. test-sha1.sh
  265. test-sigchain.c
  266. test-string-pool.c
  267. test-subprocess.c
  268. test-svn-fe.c
  269. test-treap.c
  270. thread-utils.c
  271. thread-utils.h
  272. trace.c
  273. transport-helper.c
  274. transport.c
  275. transport.h
  276. tree-diff.c
  277. tree-walk.c
  278. tree-walk.h
  279. tree.c
  280. tree.h
  281. unimplemented.sh
  282. unpack-trees.c
  283. unpack-trees.h
  284. upload-pack.c
  285. url.c
  286. url.h
  287. usage.c
  288. userdiff.c
  289. userdiff.h
  290. utf8.c
  291. utf8.h
  292. walker.c
  293. walker.h
  294. wrap-for-bin.sh
  295. wrapper.c
  296. write_or_die.c
  297. ws.c
  298. wt-status.c
  299. wt-status.h
  300. xdiff-interface.c
  301. xdiff-interface.h
  302. zlib.c