GIF89a=( õ' 7IAXKgNgYvYx\%wh…hŽth%ˆs%—x¨}9®Œ©€&©‰%¶†(¹–.¹5·œD¹&Çš)ÇŸ5ǘ;Í£*È¡&Õ²)ׯ7×µ<Ñ»4ï°3ø‘HÖ§KͯT÷¨Yÿšqÿ»qÿÔFØ !ù ' !ÿ NETSCAPE2.0 , =( þÀ“pH,È¤rÉl:ŸÐ¨tJ­Z¯Ø¬vËíz¿à°xL.›Ïè´zÍn»ßð¸|N¯Ûïø¼~Ïïûÿ€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§gª«ªE¯°¨¬ª±²Œ¹º¹E¾­”´ÂB¶¯ §Åȸ»ÑD¾¿Á•ÄÅ®° ÝH¾ÒLÀÆDÙ«D¶BÝïðÀ¾DÑÑÔTÌÍíH òGö¨A RÎڐ |¥ ٭&ºìE8œ¹kGÔAÞpx­a¶­ã R2XB®åE8I€Õ6Xî:vT)äžþÀq¦è³¥ì仕F~%xñ  4#ZÔ‰O|-4Bs‘X:= QÉ œš lºÒyXJŠGȦ|s hÏíK–3l7·B|¥$'7Jީܪ‰‡àá”Dæn=Pƒ ¤Òëí‰`䌨ljóá¯Éüv>á–Á¼5 ½.69ûϸd«­ºÀûnlv©‹ªîf{¬ÜãPbŸ  l5‘Ž¯pß ´ ˜3aÅùäI«O’ý·‘áÞ‡˜¾Æ‚ÙÏiÇÿ‹Àƒ #öó)pâš Þ½ ‘Ý{ó)vmÞü%D~ 6f s}ŃƒDØW Eþ`‡þ À…L8xá†ç˜{)x`X/> Ì}mø‚–RØ‘*|`D=‚Ø_ ^ð5 !_…'aä“OÚ—7âcð`D”Cx`ÝÂ¥ä‹éY¹—F¼¤¥Š?¡Õ™ n@`} lď’ÄÉ@4>ñd œ à‘vÒxNÃ×™@žd=ˆgsžG±æ ´²æud &p8Qñ)ˆ«lXD©øÜéAžHìySun jª×k*D¤LH] †¦§C™Jä–´Xb~ʪwStŽ6K,°£qÁœ:9ت:¨þªl¨@¡`‚ûÚ ».Û¬¯t‹ÆSÉ[:°=Š‹„‘Nåû”Ìî{¿ÂA ‡Rà›ÀÙ6úë°Ÿð0Ä_ ½;ÃϱîÉì^ÇÛÇ#Ëë¼ôº!±Ä˜íUîÅÇ;0L1óÁµö«p% AÀºU̬ݵ¼á%霼€‡¯Á~`ÏG¯»À× ­²± =4ªnpð3¾¤³¯­ü¾¦îuÙuµÙ®|%2ÊIÿür¦#0·ÔJ``8È@S@5ê¢ ö×Þ^`8EÜ]ý.뜃Âç 7 ú ȉÞj œ½Dç zý¸iþœÑÙûÄë!ˆÞÀl§Ïw‹*DçI€nEX¯¬¼ &A¬Go¼QföõFç°¯;é¦÷îŽêJ°îúôF5¡ÌQ|îúöXªæ»TÁÏyñêï]ê² o óÎC=öõ›ÒÓPB@ D×½œä(>èCÂxŽ`±«Ÿ–JЀ»Û á¤±p+eE0`ëŽ`A Ú/NE€Ø†À9‚@¤à H½7”à‡%B‰`Àl*ƒó‘–‡8 2ñ%¸ —€:Ù1Á‰E¸àux%nP1ð!‘ðC)¾P81lÑɸF#ˆ€{´âé°ÈB„0>±û °b¡Š´±O‚3È–Ù()yRpbµ¨E.Z‘D8ÊH@% òŒx+%Ù˜Æcü »¸˜fõ¬b·d`Fê™8èXH"ÉÈ-±|1Ô6iI, 2““¬$+](A*jÐ QTÂo‰.ÛU슬Œã„Ž`¯SN¡–¶Äåyše¯ª’­¬‚´b¦Éož œ)åyâ@Ì®3 ÎtT̉°&Ø+žLÀf"Ø-|žçÔ>‡Ðv¦Ðžì\‚ Q1)Ž@Žh#aP72”ˆ™¨$‚ !ù " , =( …7IAXG]KgNgYvYxR"k\%w]'}hŽth%ˆg+ˆs%—r.—m3šx3˜x¨}9®€&©€+¨‡7§‰%¶†(¹–.¹œD¹&ǘ;Í•&ײ)×»4ïÌ6ò§KÍ þ@‘pH,È¤rÉl:ŸÐ¨tJ­Z¯Ø¬vËíz¿à°xL.›Ïè´zÍn»ßð¸|N¯Ûïø¼~Ïïûÿ€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§g «¬ E ±± ¨­¶°ººE Á´”·®C¬²§Ç¶Œ»ÓDÃÕƷ¯Ê±H½ºM×ÁGÚ¬D¶BËÁ½î½DÓôTÏÛßîG»ôõC×CÌ l&âž:'òtU³6ɹ#·Ø)€'Ü.6±&ëÍÈ» K(8p0N?!æ2"ÛˆNIJX>R¼ÐO‚M '¡¨2¸*Ÿþ>#n↠å@‚<[:¡Iïf’ ¤TÚ˘CdbÜÙ“[«ŽEú5MBo¤×@€`@„€Êt W-3 ¶Ÿ¡BíêäjIÝ…Eò9[T…$íêﯧ„…•s»Óȳ¹€ÅÚdc®UUρ#±Ùïldj?´í¼²`\ŽÁðÞu|3'ÖŒ]ë6 ¶S#²‡˜FKLÈ *N E´‘áäŠ$˜›eÄYD„ºq«.è촁ƒs \-ÔjA 9²õ÷å- üúM[Âx(ís÷ì®x€|í¡Ù’p¦‚ ŽkÛTÇDpE@WÜ ²Ç]kŠ1¨ þ€·Yb ÓÁ‰l°*n0 ç™—žzBdОu¾7ĉBl€â‰-ºx~|UåU‰  h*Hœ|e"#"?vpÄiŠe6^ˆ„+qâŠm8 #VÇá ‘å–ÄV„œ|Šè•m"сœn|@›U¶ÆΞ—Špb¥G¨ED”€±Úê2FÌIç? >Éxå Œ± ¡¤„%‘žjŸ‘ꄯ<Ìaà9ijÐ2˜D¦È&›†Z`‚å]wþ¼Â:ç6àB¤7eFJ|õÒ§Õ,¨äàFÇ®cS·Ê¶+B°,‘Þ˜ºNûãØ>PADÌHD¹æž«ÄÀnÌ¥}­#Ë’ë QÀÉSÌÂÇ2ÌXÀ{æk²lQÁ2«ÊðÀ¯w|2Í h‹ÄÂG€,m¾¶ë3ÐÙ6-´ÅE¬L°ÆIij*K½ÀÇqï`DwVÍQXœÚÔpeœ±¬Ñ q˜§Tœ½µƒ°Œìu Â<¶aØ*At¯lmEØ ü ôÛN[P1ÔÛ¦­±$ÜÆ@`ùåDpy¶yXvCAyåB`ŽD¶ 0QwG#¯ æš[^Äþ $ÀÓÝǦ{„L™[±úKÄgÌ;ï£S~¹ìGX.ôgoT.»åˆ°ùŸûù¡?1zö¦Ÿž:ÅgÁ|ìL¹ „®£œŠ‚à0œ]PÁ^p F<"•ç?!,ñ‡N4—…PÄ Á„ö¨Û:Tè@hÀ‹%táÿ:ø-žI<`þ‹p I….)^ 40D#p@ƒj4–؀:²‰1Øâr˜¼F2oW¼#Z†;$Q q” ‘ ÂK¦ñNl#29 !’F@¥Bh·ᏀL!—XFóLH‘Kh¤.«hE&JòG¨¥<™WN!€ÑÙÚˆY„@†>Œž19J" 2,/ &.GXB%ÌRÈ9B6¹W]’î×ÔW¥’IÎ$ ñ‹ÓŒE8YÆ ¼³™ñA5“à®Q.aŸB€&Ø©³ JÁ—! ¦t)K%tœ-¦JF bòNMxLôþ)ÐR¸Ð™‘ èÝ6‘O!THÌ„HÛ ‰ !ù ) , =( …AXKgNgYvYxR"k\%wh…hŽh%ˆg+ˆs%—r.—x3˜x¨}9®€&©€+¨Œ,©‡7§‰%¶†(¹–.¹5·&Çš)ǘ;Í•&×£*Ȳ)ׯ7×»4ï°3øÌ6ò‘HÖ§KÍ»Hó¯T÷¨Yÿ»qÿÇhÿ þÀ”pH,È¤rÉl:ŸÐ¨tJ­Z¯Ø¬vËíz¿à°xL.›Ïè´zÍn»ßð¸|N¯Ûïø¼~Ïïûÿ€‚ƒ„…†‡ˆ‰Š‹ŒŽ‘’“”•–—˜™š›œžŸ ¡¢£¤¥¦§g ª« E$±²¨ª­ · °²½$E$ÂÕ««D· Í ¿¦Ç¶¸ÌŒ¾³CÃÅÆ E ééH½MÛÂGâªD­ çBêêϾD²ÒaÀà€Š1r­ðÓ¤ ÔožzU!L˜C'¾yW½UGtäÇïÙllê0×àÂuGþ)AÀs[þ·xì ÁxO%ƒûX2ó—  P£n›R/¡ÑšHše+êDm?# —‘Ç£6¡8íJ¡ŸâDiäªM¥Ö„ôj“¬¹£5oQ7°- <‡ *´lãÓŒ2r/a!l)dÈ A™ÈE¢ôÔ͆…ð ;Ö˜c ¡%ß‚’Ùˆâ¸b½—pe~C"BíëÚHïeF2§æŠ8qb t_`urŠeü wÅu3êæPv§h•"ß`íÍxçLĹÜÖ3á  ~Öº“®›¸ÏMDfJÙ °„ÛµáWõ%§œ‚à©–‚X Ó؁)@®Ñ›Eþ´wëuÅSxb8y\mÖzœ¥§ZbºE—ÂLªÌw!y(>¡™wú=Ç|ÅÝs¢d €CÁW)HÜcC$€L Ä7„r.á\{)@ð` @ äXÈ$PD” `šaG:§æˆOˆ72EÐamn]ù"ŒcÊxÑŒ° &dR8`g«iÙŸLR!¦P …d’ä¡“¦ðÎTƒ¦ià|À _ ¥ Qi#¦Šg›Æ ›noMµ ›V ã£)p ç£ÎW…š=Âeªk§†j„ ´®1ß²sÉxéW«jšl|0¯B0Û, \jÛ´›6±¬¶C ÛíWþï|ëÙ‹¸ñzĸV {ì;Ýñn¼òVˆm³I¼³.Ðã¤PN¥ ²µ¼„µCã+¹ÍByî£Ñ¾HŸ›ëê 7ìYÆFTk¨SaoaY$Dµœìï¿Ã29RÈkt Çïfñ ÇÒ:ÀÐSp¹3ÇI¨â¥DZÄ ü9Ïýögñ½­uÔ*3)O‘˜Ö[_hv ,àî×Et Ÿé¶BH€ Õ[ü±64M@ÔSÌM7dÐl5-ÄÙU܍´©zߌ3Ô€3ž„ „ ¶ÛPô½5×g› êÚ˜kN„Ý…0Îj4€Ìë°“#{þÕ3S2çKÜ'ợlø¼Ú2K{° {Û¶?žm𸧠ËI¼nEò='êüóºè^üæÃ_Û=°óž‚ì#Oý¿Í'¡½áo..ÏYìnüñCœO±Áa¿¢Kô½o,üÄËbö²çºíï{ËC Ú— "”Ï{ËK ÍÒw„õ±Oz dÕ¨à:$ ƒô—«v»] A#ð «€¿šéz)Rx׿ˆ¥‚d``èw-îyÏf×K!ð€þ­Ð|ìPľ„=Ì`ý(f” 'Pa ¥ÐBJa%Ðâf§„%Š¡}FàáÝ×6>ÉäŠG"éŽè=ø!oŠ°^FP¼Ø©Q„ÀCÙÁ`(Ž\ÄÝ® ©Â$<n@dÄ E#ììUÒI! ‚#lù‹`k¦ÐÇ'Rró’ZýNBÈMF Í[¤+‹ðɈ-áwj¨¥þ8¾rá ,VÂh„"|½œ=×G_¦Ñ™EØ 0i*%̲˜Æda0mV‚k¾)›;„&6 p>ÓjK “¦Ç# âDÂ:ûc?:R Ó¬fÞéI-Ì“•Ã<ä=™Ï7˜3œ¨˜c2ŒW ,ˆ”8(T™P‰F¡Jhç"‚ ; 403WebShell
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/*
 *  Phusion Passenger - https://www.phusionpassenger.com/
 *  Copyright (c) 2010-2017 Phusion Holding B.V.
 *
 *  "Passenger", "Phusion Passenger" and "Union Station" are registered
 *  trademarks of Phusion Holding B.V.
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to deal
 *  in the Software without restriction, including without limitation the rights
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in
 *  all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *  THE SOFTWARE.
 */

#ifndef _GNU_SOURCE
	#define _GNU_SOURCE // according to Linux man page for syscall()
#endif

#include <sys/types.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#include <signal.h>
#include <fcntl.h>
#include <stdlib.h>
#include <dirent.h>
#include <poll.h>
#ifdef __linux__
	#include <sys/syscall.h>
	#include <features.h>
#endif

#include <string>
#include <cstddef>
#include <cstring>
#include <climits>
#include <cerrno>

#include <ProcessManagement/Utils.h>
#include <Utils/AsyncSignalSafeUtils.h>

#if defined(__NetBSD__) || defined(__OpenBSD__) || defined(__sun) || defined(__FreeBSD__)
	// Introduced in Solaris 9. Let's hope nobody actually uses
	// a version that doesn't support this.
	#define HAS_CLOSEFROM
#endif

namespace Passenger {

using namespace std;


#ifdef __APPLE__
	// http://www.opensource.apple.com/source/Libc/Libc-825.26/sys/fork.c
	// This bypasses atfork handlers.
	extern "C" {
		extern pid_t __fork(void);
	}
#endif

pid_t
asyncFork() {
	#if defined(__linux__)
		#if defined(SYS_fork)
			return (pid_t) syscall(SYS_fork);
		#else
			return syscall(SYS_clone, SIGCHLD, 0, 0, 0, 0);
		#endif
	#elif defined(__APPLE__)
		return __fork();
	#else
		return fork();
	#endif
}

void
resetSignalHandlersAndMask() {
	struct sigaction action;
	action.sa_handler = SIG_DFL;
	action.sa_flags   = SA_RESTART;
	sigemptyset(&action.sa_mask);
	sigaction(SIGHUP,  &action, NULL);
	sigaction(SIGINT,  &action, NULL);
	sigaction(SIGQUIT, &action, NULL);
	sigaction(SIGILL,  &action, NULL);
	sigaction(SIGTRAP, &action, NULL);
	sigaction(SIGABRT, &action, NULL);
	#ifdef SIGEMT
		sigaction(SIGEMT,  &action, NULL);
	#endif
	sigaction(SIGFPE,  &action, NULL);
	sigaction(SIGBUS,  &action, NULL);
	sigaction(SIGSEGV, &action, NULL);
	sigaction(SIGSYS,  &action, NULL);
	sigaction(SIGPIPE, &action, NULL);
	sigaction(SIGALRM, &action, NULL);
	sigaction(SIGTERM, &action, NULL);
	sigaction(SIGURG,  &action, NULL);
	sigaction(SIGSTOP, &action, NULL);
	sigaction(SIGTSTP, &action, NULL);
	sigaction(SIGCONT, &action, NULL);
	sigaction(SIGCHLD, &action, NULL);
	#ifdef SIGINFO
		sigaction(SIGINFO, &action, NULL);
	#endif
	sigaction(SIGUSR1, &action, NULL);
	sigaction(SIGUSR2, &action, NULL);

	// We reset the signal mask after resetting the signal handlers,
	// because prior to calling resetSignalHandlersAndMask(), the
	// process might be blocked on some signals. We want those signals
	// to be processed after installing the new signal handlers
	// so that bugs like https://github.com/phusion/passenger/pull/97
	// can be prevented.

	sigset_t signal_set;
	int ret;

	sigemptyset(&signal_set);
	do {
		ret = sigprocmask(SIG_SETMASK, &signal_set, NULL);
	} while (ret == -1 && errno == EINTR);
}

void
disableMallocDebugging() {
	unsetenv("MALLOC_FILL_SPACE");
	unsetenv("MALLOC_PROTECT_BEFORE");
	unsetenv("MallocGuardEdges");
	unsetenv("MallocScribble");
	unsetenv("MallocPreScribble");
	unsetenv("MallocCheckHeapStart");
	unsetenv("MallocCheckHeapEach");
	unsetenv("MallocCheckHeapAbort");
	unsetenv("MallocBadFreeAbort");
	unsetenv("MALLOC_CHECK_");

	const char *libs = getenv("DYLD_INSERT_LIBRARIES");
	if (libs != NULL && strstr(libs, "/usr/lib/libgmalloc.dylib")) {
		string newLibs = libs;
		string::size_type pos = newLibs.find("/usr/lib/libgmalloc.dylib");
		size_t len = strlen("/usr/lib/libgmalloc.dylib");

		// Erase all leading ':' too.
		while (pos > 0 && newLibs[pos - 1] == ':') {
			pos--;
			len++;
		}
		// Erase all trailing ':' too.
		while (pos + len < newLibs.size() && newLibs[pos + len] == ':') {
			len++;
		}

		newLibs.erase(pos, len);
		if (newLibs.empty()) {
			unsetenv("DYLD_INSERT_LIBRARIES");
		} else {
			setenv("DYLD_INSERT_LIBRARIES", newLibs.c_str(), 1);
		}
	}
}

// Async-signal safe way to get the current process's hard file descriptor limit.
static int
getFileDescriptorLimit() {
	long long sysconfResult = sysconf(_SC_OPEN_MAX);

	struct rlimit rl;
	long long rlimitResult;
	if (getrlimit(RLIMIT_NOFILE, &rl) == -1) {
		rlimitResult = 0;
	} else {
		rlimitResult = (long long) rl.rlim_max;
	}

	long result;
	// OS X 10.9 returns LLONG_MAX. It doesn't make sense
	// to use that result so we limit ourselves to the
	// sysconf result.
	if (rlimitResult >= INT_MAX || sysconfResult > rlimitResult) {
		result = sysconfResult;
	} else {
		result = rlimitResult;
	}

	if (result < 0) {
		// Unable to query the file descriptor limit.
		result = 9999;
	} else if (result < 2) {
		// The calls reported broken values.
		result = 2;
	}
	return result;
}

// Async-signal safe function to get the highest file
// descriptor that the process is currently using.
// See also http://stackoverflow.com/questions/899038/getting-the-highest-allocated-file-descriptor
static int
getHighestFileDescriptor(bool asyncSignalSafe) {
#if defined(F_MAXFD)
	int ret;

	do {
		ret = fcntl(0, F_MAXFD);
	} while (ret == -1 && errno == EINTR);
	if (ret == -1) {
		ret = getFileDescriptorLimit();
	}
	return ret;

#else
	int p[2], ret, flags;
	pid_t pid = -1;
	int result = -1;

	/* Since opendir() may not be async signal safe and thus may lock up
	 * or crash, we use it in a child process which we kill if we notice
	 * that things are going wrong.
	 */

	// Make a pipe.
	p[0] = p[1] = -1;
	do {
		ret = pipe(p);
	} while (ret == -1 && errno == EINTR);
	if (ret == -1) {
		goto done;
	}

	// Make the read side non-blocking.
	do {
		flags = fcntl(p[0], F_GETFL);
	} while (flags == -1 && errno == EINTR);
	if (flags == -1) {
		goto done;
	}
	do {
		fcntl(p[0], F_SETFL, flags | O_NONBLOCK);
	} while (ret == -1 && errno == EINTR);
	if (ret == -1) {
		goto done;
	}

	if (asyncSignalSafe) {
		do {
			pid = asyncFork();
		} while (pid == -1 && errno == EINTR);
	} else {
		do {
			pid = fork();
		} while (pid == -1 && errno == EINTR);
	}

	if (pid == 0) {
		// Don't close p[0] here or it might affect the result.

		resetSignalHandlersAndMask();

		struct sigaction action;
		action.sa_handler = _exit;
		action.sa_flags   = SA_RESTART;
		sigemptyset(&action.sa_mask);
		sigaction(SIGSEGV, &action, NULL);
		sigaction(SIGPIPE, &action, NULL);
		sigaction(SIGBUS, &action, NULL);
		sigaction(SIGILL, &action, NULL);
		sigaction(SIGFPE, &action, NULL);
		sigaction(SIGABRT, &action, NULL);

		DIR *dir = NULL;
		#ifdef __APPLE__
			/* /dev/fd can always be trusted on OS X. */
			dir = opendir("/dev/fd");
		#else
			/* On FreeBSD and possibly other operating systems, /dev/fd only
			 * works if fdescfs is mounted. If it isn't mounted then /dev/fd
			 * still exists but always returns [0, 1, 2] and thus can't be
			 * trusted. If /dev and /dev/fd are on different filesystems
			 * then that probably means fdescfs is mounted.
			 */
			struct stat dirbuf1, dirbuf2;
			if (stat("/dev", &dirbuf1) == -1
			 || stat("/dev/fd", &dirbuf2) == -1) {
				_exit(1);
			}
			if (dirbuf1.st_dev != dirbuf2.st_dev) {
				dir = opendir("/dev/fd");
			}
		#endif
		if (dir == NULL) {
			dir = opendir("/proc/self/fd");
			if (dir == NULL) {
				_exit(1);
			}
		}

		struct dirent *ent;
		union {
			int highest;
			char data[sizeof(int)];
		} u;
		u.highest = -1;

		while ((ent = readdir(dir)) != NULL) {
			if (ent->d_name[0] != '.') {
				int number = atoi(ent->d_name);
				if (number > u.highest) {
					u.highest = number;
				}
			}
		}
		if (u.highest != -1) {
			ssize_t ret, written = 0;
			do {
				ret = write(p[1], u.data + written, sizeof(int) - written);
				if (ret == -1) {
					_exit(1);
				}
				written += ret;
			} while (written < (ssize_t) sizeof(int));
		}
		closedir(dir);
		_exit(0);

	} else if (pid == -1) {
		goto done;

	} else {
		close(p[1]); // Do not retry on EINTR: http://news.ycombinator.com/item?id=3363819
		p[1] = -1;

		union {
			int highest;
			char data[sizeof(int)];
		} u;
		ssize_t ret, bytesRead = 0;
		struct pollfd pfd;
		pfd.fd = p[0];
		pfd.events = POLLIN;

		do {
			do {
				// The child process must finish within 30 ms, otherwise
				// we might as well query sysconf.
				ret = poll(&pfd, 1, 30);
			} while (ret == -1 && errno == EINTR);
			if (ret <= 0) {
				goto done;
			}

			do {
				ret = read(p[0], u.data + bytesRead, sizeof(int) - bytesRead);
			} while (ret == -1 && errno == EINTR);
			if (ret == -1) {
				if (errno != EAGAIN) {
					goto done;
				}
			} else if (ret == 0) {
				goto done;
			} else {
				bytesRead += ret;
			}
		} while (bytesRead < (ssize_t) sizeof(int));

		result = u.highest;
		goto done;
	}

done:
	// Do not retry on EINTR: http://news.ycombinator.com/item?id=3363819
	if (p[0] != -1) {
		close(p[0]);
	}
	if (p[1] != -1) {
		close(p[1]);
	}
	if (pid != -1) {
		do {
			ret = kill(pid, SIGKILL);
		} while (ret == -1 && errno == EINTR);
		do {
			ret = waitpid(pid, NULL, 0);
		} while (ret == -1 && errno == EINTR);
	}

	if (result == -1) {
		result = getFileDescriptorLimit();
	}
	return result;
#endif
}

void
closeAllFileDescriptors(int lastToKeepOpen, bool asyncSignalSafe) {
	#if defined(F_CLOSEM)
		int ret;
		do {
			ret = fcntl(lastToKeepOpen + 1, F_CLOSEM);
		} while (ret == -1 && errno == EINTR);
		if (ret != -1) {
			return;
		}
	#elif defined(HAS_CLOSEFROM)
		closefrom(lastToKeepOpen + 1);
		return;
	#endif

	for (int i = getHighestFileDescriptor(asyncSignalSafe); i > lastToKeepOpen; i--) {
		/* Even though we normally shouldn't retry on EINTR
		 * (http://news.ycombinator.com/item?id=3363819)
		 * it's okay to do that here because this function
		 * may only be called in a single-threaded environment.
		 */
		int ret;
		do {
			ret = close(i);
		} while (ret == -1 && errno == EINTR);
	}
}

void
printExecError(const char **command, int errcode) {
	char buf[1024] = { };
	printExecError2(command, errcode, buf, sizeof(buf));
}

void
printExecError2(const char **command, int errcode, char *buf, size_t size) {
	char *pos = buf;
	const char *end = buf + size;

	pos = AsyncSignalSafeUtils::appendData(pos, end, "*** ERROR: cannot execute ");
	pos = AsyncSignalSafeUtils::appendData(pos, end, command[0]);
	pos = AsyncSignalSafeUtils::appendData(pos, end, ": ");
	pos = AsyncSignalSafeUtils::appendData(pos, end,
		AsyncSignalSafeUtils::limitedStrerror(errcode));
	pos = AsyncSignalSafeUtils::appendData(pos, end, " (errno=");
	pos = AsyncSignalSafeUtils::appendInteger<int, 10>(pos, end, errcode);
	pos = AsyncSignalSafeUtils::appendData(pos, end, ")\n");

	AsyncSignalSafeUtils::printError(buf, pos - buf);
}


} // namespace Passenger

Youez - 2016 - github.com/yon3zu
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