run-command: be more informative about what failed

While debugging an error with verify_signed_buffer() the error
messages from run-command weren't very useful:

 error: cannot create pipe for gpg: Too many open files
 error: could not run gpg.

because they didn't indicate *which* pipe couldn't be created.

Print which pipe failed to be created in the error message so we
can more easily debug similar problems in the future.

For example, the above error now prints:

 error: cannot create standard error pipe for gpg: Too many open files
 error: could not run gpg.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 file changed
tree: a731680c80eeaefec27ecced14aa133fc64aa56f
  1. block-sha1/
  2. builtin/
  3. compat/
  4. contrib/
  5. Documentation/
  6. git-gui/
  7. git_remote_helpers/
  8. gitk-git/
  9. gitweb/
  10. mergetools/
  11. perl/
  12. po/
  13. ppc/
  14. t/
  15. templates/
  16. vcs-svn/
  17. xdiff/
  18. .gitattributes
  19. .gitignore
  20. .mailmap
  21. abspath.c
  22. aclocal.m4
  23. advice.c
  24. advice.h
  25. alias.c
  26. alloc.c
  27. archive-tar.c
  28. archive-zip.c
  29. archive.c
  30. archive.h
  31. argv-array.c
  32. argv-array.h
  33. attr.c
  34. attr.h
  35. base85.c
  36. bisect.c
  37. bisect.h
  38. blob.c
  39. blob.h
  40. branch.c
  41. branch.h
  42. builtin.h
  43. bulk-checkin.c
  44. bulk-checkin.h
  45. bundle.c
  46. bundle.h
  47. cache-tree.c
  48. cache-tree.h
  49. cache.h
  50. check-builtins.sh
  51. check-racy.c
  52. check_bindir
  53. color.c
  54. color.h
  55. column.c
  56. column.h
  57. combine-diff.c
  58. command-list.txt
  59. commit.c
  60. commit.h
  61. config.c
  62. config.mak.in
  63. configure.ac
  64. connect.c
  65. connected.c
  66. connected.h
  67. convert.c
  68. convert.h
  69. copy.c
  70. COPYING
  71. credential-cache--daemon.c
  72. credential-cache.c
  73. credential-store.c
  74. credential.c
  75. credential.h
  76. csum-file.c
  77. csum-file.h
  78. ctype.c
  79. daemon.c
  80. date.c
  81. decorate.c
  82. decorate.h
  83. delta.h
  84. diff-delta.c
  85. diff-lib.c
  86. diff-no-index.c
  87. diff.c
  88. diff.h
  89. diffcore-break.c
  90. diffcore-delta.c
  91. diffcore-order.c
  92. diffcore-pickaxe.c
  93. diffcore-rename.c
  94. diffcore.h
  95. dir.c
  96. dir.h
  97. editor.c
  98. entry.c
  99. environment.c
  100. exec_cmd.c
  101. exec_cmd.h
  102. fast-import.c
  103. fetch-pack.h
  104. fixup-builtins
  105. fmt-merge-msg.h
  106. fsck.c
  107. fsck.h
  108. generate-cmdlist.sh
  109. gettext.c
  110. gettext.h
  111. git-add--interactive.perl
  112. git-am.sh
  113. git-archimport.perl
  114. git-bisect.sh
  115. git-compat-util.h
  116. git-cvsexportcommit.perl
  117. git-cvsimport.perl
  118. git-cvsserver.perl
  119. git-difftool--helper.sh
  120. git-difftool.perl
  121. git-filter-branch.sh
  122. git-instaweb.sh
  123. git-lost-found.sh
  124. git-merge-octopus.sh
  125. git-merge-one-file.sh
  126. git-merge-resolve.sh
  127. git-mergetool--lib.sh
  128. git-mergetool.sh
  129. git-p4.py
  130. git-parse-remote.sh
  131. git-pull.sh
  132. git-quiltimport.sh
  133. git-rebase--am.sh
  134. git-rebase--interactive.sh
  135. git-rebase--merge.sh
  136. git-rebase.sh
  137. git-relink.perl
  138. git-remote-testgit.py
  139. git-repack.sh
  140. git-request-pull.sh
  141. git-send-email.perl
  142. git-sh-i18n.sh
  143. git-sh-setup.sh
  144. git-stash.sh
  145. git-submodule.sh
  146. git-svn.perl
  147. GIT-VERSION-GEN
  148. git-web--browse.sh
  149. git.c
  150. git.spec.in
  151. gpg-interface.c
  152. gpg-interface.h
  153. graph.c
  154. graph.h
  155. grep.c
  156. grep.h
  157. hash.c
  158. hash.h
  159. help.c
  160. help.h
  161. hex.c
  162. http-backend.c
  163. http-fetch.c
  164. http-push.c
  165. http-walker.c
  166. http.c
  167. http.h
  168. ident.c
  169. imap-send.c
  170. INSTALL
  171. kwset.c
  172. kwset.h
  173. levenshtein.c
  174. levenshtein.h
  175. LGPL-2.1
  176. list-objects.c
  177. list-objects.h
  178. ll-merge.c
  179. ll-merge.h
  180. lockfile.c
  181. log-tree.c
  182. log-tree.h
  183. mailmap.c
  184. mailmap.h
  185. Makefile
  186. match-trees.c
  187. merge-file.c
  188. merge-file.h
  189. merge-recursive.c
  190. merge-recursive.h
  191. mergesort.c
  192. mergesort.h
  193. name-hash.c
  194. notes-cache.c
  195. notes-cache.h
  196. notes-merge.c
  197. notes-merge.h
  198. notes.c
  199. notes.h
  200. object.c
  201. object.h
  202. pack-check.c
  203. pack-refs.c
  204. pack-refs.h
  205. pack-revindex.c
  206. pack-revindex.h
  207. pack-write.c
  208. pack.h
  209. pager.c
  210. parse-options-cb.c
  211. parse-options.c
  212. parse-options.h
  213. patch-delta.c
  214. patch-ids.c
  215. patch-ids.h
  216. path.c
  217. pkt-line.c
  218. pkt-line.h
  219. preload-index.c
  220. pretty.c
  221. progress.c
  222. progress.h
  223. prompt.c
  224. prompt.h
  225. quote.c
  226. quote.h
  227. reachable.c
  228. reachable.h
  229. read-cache.c
  230. README
  231. reflog-walk.c
  232. reflog-walk.h
  233. refs.c
  234. refs.h
  235. remote-curl.c
  236. remote.c
  237. remote.h
  238. replace_object.c
  239. rerere.c
  240. rerere.h
  241. resolve-undo.c
  242. resolve-undo.h
  243. revision.c
  244. revision.h
  245. run-command.c
  246. run-command.h
  247. send-pack.h
  248. sequencer.c
  249. sequencer.h
  250. server-info.c
  251. setup.c
  252. sh-i18n--envsubst.c
  253. sha1-array.c
  254. sha1-array.h
  255. sha1-lookup.c
  256. sha1-lookup.h
  257. sha1_file.c
  258. sha1_name.c
  259. shallow.c
  260. shell.c
  261. shortlog.h
  262. show-index.c
  263. sideband.c
  264. sideband.h
  265. sigchain.c
  266. sigchain.h
  267. strbuf.c
  268. strbuf.h
  269. streaming.c
  270. streaming.h
  271. string-list.c
  272. string-list.h
  273. submodule.c
  274. submodule.h
  275. symlinks.c
  276. tag.c
  277. tag.h
  278. tar.h
  279. test-chmtime.c
  280. test-ctype.c
  281. test-date.c
  282. test-delta.c
  283. test-dump-cache-tree.c
  284. test-genrandom.c
  285. test-index-version.c
  286. test-line-buffer.c
  287. test-match-trees.c
  288. test-mergesort.c
  289. test-mktemp.c
  290. test-parse-options.c
  291. test-path-utils.c
  292. test-regex.c
  293. test-revision-walking.c
  294. test-run-command.c
  295. test-scrap-cache-tree.c
  296. test-sha1.c
  297. test-sha1.sh
  298. test-sigchain.c
  299. test-subprocess.c
  300. test-svn-fe.c
  301. thread-utils.c
  302. thread-utils.h
  303. trace.c
  304. transport-helper.c
  305. transport.c
  306. transport.h
  307. tree-diff.c
  308. tree-walk.c
  309. tree-walk.h
  310. tree.c
  311. tree.h
  312. unimplemented.sh
  313. unix-socket.c
  314. unix-socket.h
  315. unpack-trees.c
  316. unpack-trees.h
  317. upload-pack.c
  318. url.c
  319. url.h
  320. usage.c
  321. userdiff.c
  322. userdiff.h
  323. utf8.c
  324. utf8.h
  325. varint.c
  326. varint.h
  327. version.c
  328. version.h
  329. walker.c
  330. walker.h
  331. wrap-for-bin.sh
  332. wrapper.c
  333. write_or_die.c
  334. ws.c
  335. wt-status.c
  336. wt-status.h
  337. xdiff-interface.c
  338. xdiff-interface.h
  339. zlib.c