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Diffstat (limited to '')
| -rw-r--r-- | lib/clplumbing/GSource.c | 1864 |
1 files changed, 1864 insertions, 0 deletions
diff --git a/lib/clplumbing/GSource.c b/lib/clplumbing/GSource.c new file mode 100644 index 0000000..48bb198 --- /dev/null +++ b/lib/clplumbing/GSource.c @@ -0,0 +1,1864 @@ +/* + * Copyright (c) 2002 Alan Robertson <alanr@unix.sh> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <lha_internal.h> +#include <string.h> +#include <sys/wait.h> +#include <sys/types.h> +#include <sys/time.h> +#include <sys/resource.h> +#include <unistd.h> +#include <stdlib.h> +#include <errno.h> + +#include <clplumbing/cl_log.h> +#include <clplumbing/cl_signal.h> +#include <clplumbing/GSource_internal.h> +#include <clplumbing/proctrack.h> +#include <clplumbing/Gmain_timeout.h> +#include <clplumbing/timers.h> + +#ifdef events +# undef events +#endif +#ifdef revents +# undef revents +#endif + +#define DEFAULT_MAXDISPATCH 0 +#define DEFAULT_MAXDELAY 0 +#define OTHER_MAXDELAY 100 + +/* + * On architectures with alignment constraints, our casting between + * "(GSource*)" and "(GFDSource_s*)" etc. causes trouble, because of + * the massive alignment requirements of "longclock_t". + * + * Use the following to store and fetch. + */ +static +void +lc_store(char *destptr, longclock_t value) { + longclock_t _ltt; + _ltt = value; + memcpy((destptr), &_ltt, sizeof(longclock_t)); +} + +static +longclock_t +lc_fetch(char *ptr) { + longclock_t _ltt; + memcpy(&_ltt, (ptr), sizeof(longclock_t)); + return _ltt; +} + +#define ERR_EVENTS (G_IO_ERR|G_IO_NVAL) +#define INPUT_EVENTS (G_IO_IN|G_IO_PRI|G_IO_HUP) +#define OUTPUT_EVENTS (G_IO_OUT) +#define DEF_EVENTS (INPUT_EVENTS|ERR_EVENTS) + +#define WARN_DELAY(ms, mx, input) cl_log(LOG_WARNING \ + , "%s: Dispatch function for %s was delayed" \ + " %lu ms (> %lu ms) before being called (GSource: 0x%lx)" \ + , __FUNCTION__, (input)->description, ms, mx \ + , POINTER_TO_ULONG(input)) + +#define EXPLAINDELAY(started, detected) cl_log(LOG_INFO \ + , "%s: started at %llu should have started at %llu" \ + , __FUNCTION__, (unsigned long long)started \ + , (unsigned long long)detected) + + +#define WARN_TOOLONG(ms, mx, input) cl_log(LOG_WARNING \ + , "%s: Dispatch function for %s took too long to execute" \ + ": %lu ms (> %lu ms) (GSource: 0x%lx)" \ + , __FUNCTION__, (input)->description, ms, mx \ + , POINTER_TO_ULONG(input)) + +#define CHECK_DISPATCH_DELAY(i) { \ + unsigned long ms; \ + longclock_t dettime; \ + dispstart = time_longclock(); \ + dettime = lc_fetch((i)->detecttime); \ + ms = longclockto_ms(sub_longclock(dispstart,dettime)); \ + if ((i)->maxdispatchdelayms > 0 \ + && ms > (i)->maxdispatchdelayms) { \ + WARN_DELAY(ms, (i)->maxdispatchdelayms, (i)); \ + EXPLAINDELAY(dispstart, dettime); \ + } \ +} + +#define CHECK_DISPATCH_TIME(i) { \ + unsigned long ms; \ + longclock_t dispend = time_longclock(); \ + ms = longclockto_ms(sub_longclock(dispend, dispstart)); \ + if ((i)->maxdispatchms > 0 && ms > (i)->maxdispatchms) { \ + WARN_TOOLONG(ms, (i)->maxdispatchms, (i)); \ + } \ + lc_store(((i)->detecttime), zero_longclock); \ +} + +#define WARN_TOOMUCH(ms, mx, input) cl_log(LOG_WARNING \ + , "%s: working on %s took %ld ms (> %ld ms)" \ + , __FUNCTION__, (input)->description, ms, mx); + +#define SAVESTART {funstart = time_longclock();} + +#define CHECKEND(input) { \ + longclock_t funend = time_longclock(); \ + long ms; \ + ms = longclockto_ms(sub_longclock(funend, funstart)); \ + if (ms > OTHER_MAXDELAY){ \ + WARN_TOOMUCH(ms, ((long) OTHER_MAXDELAY), input); \ + } \ +} \ + + +#ifndef _NSIG +# define _NSIG 2*NSIG +#endif + +static gboolean G_fd_prepare(GSource* source, + gint* timeout); +static gboolean G_fd_check(GSource* source); +static gboolean G_fd_dispatch(GSource* source, + GSourceFunc callback, + gpointer user_data); +static void G_fd_destroy(GSource* source); + +static GSourceFuncs G_fd_SourceFuncs = { + G_fd_prepare, + G_fd_check, + G_fd_dispatch, + G_fd_destroy, +}; + +GSource* +G_main_add_input(int priority, + gboolean can_recurse, + GSourceFuncs* funcs) +{ + GSource * input_source = g_source_new(funcs, sizeof(GSource)); + if (input_source == NULL){ + cl_log(LOG_ERR, "create glib source for input failed!"); + }else { + g_source_set_priority(input_source, priority); + g_source_set_can_recurse(input_source, can_recurse); + if(g_source_attach(input_source, NULL) == 0){ + cl_log(LOG_ERR, "attaching input_source to main context" + " failed!! "); + } + } + + return input_source; +} + + +/* + * Add the given file descriptor to the gmainloop world. + */ + + +GFDSource* +G_main_add_fd(int priority, int fd, gboolean can_recurse +, gboolean (*dispatch)(int fd, gpointer user_data) +, gpointer userdata +, GDestroyNotify notify) +{ + + GSource* source = g_source_new(&G_fd_SourceFuncs, + sizeof(GFDSource)); + GFDSource* ret = (GFDSource*)source; + + ret->magno = MAG_GFDSOURCE; + ret->maxdispatchdelayms = DEFAULT_MAXDELAY; + ret->maxdispatchms = DEFAULT_MAXDISPATCH; + ret->udata = userdata; + ret->dispatch = dispatch; + ret->gpfd.fd = fd; + ret->gpfd.events = DEF_EVENTS; + ret->gpfd.revents = 0; + ret->dnotify = notify; + lc_store((ret->detecttime), zero_longclock); + + g_source_add_poll(source, &ret->gpfd); + + + g_source_set_priority(source, priority); + + g_source_set_can_recurse(source, can_recurse); + + ret->gsourceid = g_source_attach(source, NULL); + ret->description = "file descriptor"; + + if (ret->gsourceid == 0) { + g_source_remove_poll(source, &ret->gpfd); + memset(ret, 0, sizeof(GFDSource)); + g_source_unref(source); + source = NULL; + ret = NULL; + } + return ret; +} + +gboolean +G_main_del_fd(GFDSource* fdp) +{ + GSource * source = (GSource*) fdp; + + + if (fdp->gsourceid <= 0) { + return FALSE; + } + + g_source_remove_poll(source, &fdp->gpfd); + g_source_remove(fdp->gsourceid); + fdp->gsourceid = 0; + g_source_unref(source); + + return TRUE; + +} + +void +g_main_output_is_blocked(GFDSource* fdp) +{ + fdp->gpfd.events |= OUTPUT_EVENTS; +} + + +/* + * For pure file descriptor events, return FALSE because we + * have to poll to get events. + * + * Note that we don't modify 'timeout' either. + */ +static gboolean +G_fd_prepare(GSource* source, + gint* timeout) +{ + GFDSource* fdp = (GFDSource*)source; + g_assert(IS_FDSOURCE(fdp)); + return FALSE; +} + +/* + * Did we notice any I/O events? + */ + +static gboolean +G_fd_check(GSource* source) + +{ + GFDSource* fdp = (GFDSource*)source; + g_assert(IS_FDSOURCE(fdp)); + if (fdp->gpfd.revents) { + lc_store((fdp->detecttime), time_longclock()); + return TRUE; + } + return FALSE; +} + +/* + * Some kind of event occurred - notify the user. + */ +static gboolean +G_fd_dispatch(GSource* source, + GSourceFunc callback, + gpointer user_data) +{ + + GFDSource* fdp = (GFDSource*)source; + longclock_t dispstart; + g_assert(IS_FDSOURCE(fdp)); + CHECK_DISPATCH_DELAY(fdp); + + + /* + * Is output now unblocked? + * + * If so, turn off OUTPUT_EVENTS to avoid going into + * a tight poll(2) loop. + */ + if (fdp->gpfd.revents & OUTPUT_EVENTS) { + fdp->gpfd.events &= ~OUTPUT_EVENTS; + } + + if(fdp->dispatch) { + if(!(fdp->dispatch(fdp->gpfd.fd, fdp->udata))){ + g_source_remove_poll(source,&fdp->gpfd); + g_source_unref(source); + CHECK_DISPATCH_TIME(fdp); + return FALSE; + } + CHECK_DISPATCH_TIME(fdp); + } + + return TRUE; +} + +/* + * Free up our data, and notify the user process... + */ +static void +G_fd_destroy(GSource* source) +{ + GFDSource* fdp = (GFDSource*)source; + g_assert(IS_FDSOURCE(fdp)); + fdp->gsourceid = 0; + if (fdp->dnotify) { + fdp->dnotify(fdp->udata); + } +} + + +/************************************************************ + * Functions for IPC_Channels + ***********************************************************/ +gboolean G_CH_prepare_int(GSource* source, + gint* timeout); +gboolean G_CH_check_int(GSource* source); + +gboolean G_CH_dispatch_int(GSource* source, + GSourceFunc callback, + gpointer user_data); +void G_CH_destroy_int(GSource* source); + + +static GSourceFuncs G_CH_SourceFuncs = { + G_CH_prepare_int, + G_CH_check_int, + G_CH_dispatch_int, + G_CH_destroy_int, +}; + + + + +void +set_IPC_Channel_dnotify(GCHSource* chp, + GDestroyNotify notify){ + chp->dnotify = notify; +} + +/* + * Add an IPC_channel to the gmainloop world... + */ +GCHSource* +G_main_IPC_Channel_constructor(GSource* source, IPC_Channel* ch + , gpointer userdata + , GDestroyNotify notify) +{ + int rfd, wfd; + GCHSource* chp; + + if( !source ) { + cl_log(LOG_WARNING, "%s:%d: got null source", __FUNCTION__,__LINE__); + return NULL; + } + if( !ch ) { + cl_log(LOG_WARNING, "%s:%d: got null channel", __FUNCTION__,__LINE__); + return NULL; + } + chp = (GCHSource*)source; + + chp->magno = MAG_GCHSOURCE; + chp->maxdispatchdelayms = DEFAULT_MAXDELAY; + chp->maxdispatchms = DEFAULT_MAXDISPATCH; + lc_store((chp->detecttime), zero_longclock); + ch->refcount++; + chp->ch = ch; + chp->udata=userdata; + chp->dnotify = notify; + chp->dontread = FALSE; + + rfd = ch->ops->get_recv_select_fd(ch); + wfd = ch->ops->get_send_select_fd(ch); + + chp->fd_fdx = (rfd == wfd); + + if (debug_level > 1) { + cl_log(LOG_DEBUG, "%s(sock=%d,%d)",__FUNCTION__, rfd,wfd); + } + chp->infd.fd = rfd; + chp->infd.events = DEF_EVENTS; + g_source_add_poll(source, &chp->infd); + if (!chp->fd_fdx) { + chp->outfd.fd = wfd; + chp->outfd.events = DEF_EVENTS; + g_source_add_poll(source, &chp->outfd); + } + chp->dispatch = NULL; + chp->description = "IPC channel(base)"; + chp->gsourceid = 0; + return chp; +} + +GCHSource* +G_main_add_IPC_Channel(int priority, IPC_Channel* ch + , gboolean can_recurse + , gboolean (*dispatch)(IPC_Channel* source_data, + gpointer user_data) + , gpointer userdata + , GDestroyNotify notify) +{ + GCHSource *chp; + GSource *source; + + if( !ch ) { + cl_log(LOG_WARNING, "%s:%d: got null channel", __FUNCTION__,__LINE__); + return NULL; + } + source = g_source_new(&G_CH_SourceFuncs, + sizeof(GCHSource)); + G_main_IPC_Channel_constructor(source,ch,userdata,notify); + + chp = (GCHSource*)source; + chp->dispatch = dispatch; + + g_source_set_priority(source, priority); + g_source_set_can_recurse(source, can_recurse); + + chp->gsourceid = g_source_attach(source, NULL); + chp->description = "IPC channel"; + + + if (chp->gsourceid == 0) { + g_source_remove_poll(source, &chp->infd); + if (!chp->fd_fdx) { + g_source_remove_poll(source, &chp->outfd); + } + g_source_unref(source); + source = NULL; + chp = NULL; + } + return chp; +} + + +void /* Suspend reading from far end writer (flow control) */ +G_main_IPC_Channel_pause(GCHSource* chp) +{ + if (chp == NULL){ + cl_log(LOG_ERR, "%s: invalid input", __FUNCTION__); + return; + } + + chp->dontread = TRUE; + return; +} + + +void /* Resume reading from far end writer (un-flow-control) */ +G_main_IPC_Channel_resume(GCHSource* chp) +{ + if (chp == NULL){ + cl_log(LOG_ERR, "%s: invalid input", __FUNCTION__); + return; + } + + chp->dontread = FALSE; + return; + +} + +/* + * Delete an IPC_channel from the gmainloop world... + */ +gboolean +G_main_del_IPC_Channel(GCHSource* chp) +{ + GSource* source = (GSource*) chp; + + if (chp == NULL || chp->gsourceid <= 0) { + return FALSE; + } + + if (debug_level > 1) { + cl_log(LOG_DEBUG, "%s(sock=%d)",__FUNCTION__, chp->infd.fd); + } + g_source_remove(chp->gsourceid); + chp->gsourceid = 0; + /* chp should (may) now be undefined */ + g_source_unref(source); + + return TRUE; +} + +/* + * For IPC_CHANNEL events, enable output checking when needed + * and note when unread input is already queued. + * + * Note that we don't modify 'timeout' either. + */ +gboolean +G_CH_prepare_int(GSource* source, + gint* timeout) +{ + GCHSource* chp = (GCHSource*)source; + longclock_t funstart; + gboolean ret; + + g_assert(IS_CHSOURCE(chp)); + SAVESTART; + + + if (chp->ch->ops->is_sending_blocked(chp->ch)) { + if (chp->fd_fdx) { + chp->infd.events |= OUTPUT_EVENTS; + }else{ + chp->outfd.events |= OUTPUT_EVENTS; + } + } + + if (chp->ch->recv_queue->current_qlen < chp->ch->recv_queue->max_qlen) { + chp->infd.events |= INPUT_EVENTS; + }else{ + /* + * This also disables EOF events - until we + * read some of the packets we've already gotten + * This prevents a tight loop in poll(2). + */ + chp->infd.events &= ~INPUT_EVENTS; + } + + if (chp->dontread){ + return FALSE; + } + ret = chp->ch->ops->is_message_pending(chp->ch); + if (ret) { + lc_store((chp->detecttime), time_longclock()); + } + CHECKEND(chp); + return ret; +} + +/* + * Did we notice any I/O events? + */ + +gboolean +G_CH_check_int(GSource* source) +{ + + GCHSource* chp = (GCHSource*)source; + gboolean ret; + longclock_t funstart; + + g_assert(IS_CHSOURCE(chp)); + SAVESTART; + + + if (chp->dontread){ + /* Make sure output gets unblocked */ + chp->ch->ops->resume_io(chp->ch); + return FALSE; + } + + ret = (chp->infd.revents != 0 + || (!chp->fd_fdx && chp->outfd.revents != 0) + || chp->ch->ops->is_message_pending(chp->ch)); + if (ret) { + lc_store((chp->detecttime), time_longclock()); + } + CHECKEND(chp); + return ret; +} + +/* + * Some kind of event occurred - notify the user. + */ +gboolean +G_CH_dispatch_int(GSource * source, + GSourceFunc callback, + gpointer user_data) +{ + GCHSource* chp = (GCHSource*)source; + longclock_t dispstart; + longclock_t resume_start = zero_longclock; + + g_assert(IS_CHSOURCE(chp)); + CHECK_DISPATCH_DELAY(chp); + + + if (chp->dontread){ + return TRUE; + } + + /* Is output now unblocked? + * + * If so, turn off OUTPUT_EVENTS to avoid going into + * a tight poll(2) loop. + */ + if (chp->fd_fdx) { + if (chp->infd.revents & OUTPUT_EVENTS) { + chp->infd.events &= ~OUTPUT_EVENTS; + } + }else if (chp->outfd.revents & OUTPUT_EVENTS) { + chp->outfd.events &= ~OUTPUT_EVENTS; + } + + if (ANYDEBUG) { + resume_start = time_longclock(); + } + + chp->ch->ops->resume_io(chp->ch); + + if (ANYDEBUG) { + longclock_t resume_end = time_longclock(); + unsigned long ms; + ms = longclockto_ms(sub_longclock(resume_end + , resume_start)); + if (ms > 10) { + cl_log(LOG_WARNING + , "%s: resume_io() for %s took %lu ms" + , __FUNCTION__ + , chp->description, ms); + } + } + + + if(chp->dispatch && chp->ch->ops->is_message_pending(chp->ch)) { + if(!(chp->dispatch(chp->ch, chp->udata))){ + g_source_remove_poll(source, &chp->infd); + if (!chp->fd_fdx) { + g_source_remove_poll(source, &chp->outfd); + } + CHECK_DISPATCH_TIME(chp); + g_source_unref(source); + return FALSE; + } + } + CHECK_DISPATCH_TIME(chp); + + if (chp->ch->ch_status == IPC_DISCONNECT){ + return FALSE; + } + return TRUE; +} + +/* + * Free up our data, and notify the user process... + */ +void +G_CH_destroy_int(GSource* source) +{ + GCHSource* chp = (GCHSource*)source; + + g_assert(IS_CHSOURCE(chp)); + if (debug_level > 1) { + cl_log(LOG_DEBUG, "%s(chp=0x%lx, sock=%d) {", __FUNCTION__ + , (unsigned long)chp, chp->infd.fd); + } + + if (chp->dnotify) { + if (debug_level > 1) { + cl_log(LOG_DEBUG + , "%s: Calling dnotify(sock=%d, arg=0x%lx) function" + , __FUNCTION__, chp->infd.fd, (unsigned long)chp->udata); + } + chp->dnotify(chp->udata); + }else{ + if (debug_level > 1) { + cl_log(LOG_DEBUG + , "%s: NOT calling dnotify(sock=%d) function" + , __FUNCTION__, chp->infd.fd); + } + } + if (chp->ch) { + if (debug_level > 1) { + cl_log(LOG_DEBUG + , "%s: calling IPC destroy (chp->ch=0x%lx, sock=%d)" + , __FUNCTION__ , (unsigned long)chp->ch, chp->infd.fd); + } + chp->ch->ops->destroy(chp->ch); + chp->ch = NULL; + } + /*chp->gsourceid = 0; ?*/ + if (debug_level > 1) { + cl_log(LOG_DEBUG, "}/*%s(sock=%d)*/", __FUNCTION__, chp->infd.fd); + } +} + + +/************************************************************ + * Functions for IPC_WaitConnections + ***********************************************************/ +static gboolean G_WC_prepare(GSource * source, + gint* timeout); +static gboolean G_WC_check(GSource* source); +static gboolean G_WC_dispatch(GSource* source, + GSourceFunc callback, + gpointer user_data); +static void G_WC_destroy(GSource* source); + +static GSourceFuncs G_WC_SourceFuncs = { + G_WC_prepare, + G_WC_check, + G_WC_dispatch, + G_WC_destroy, +}; + + +/* + * Add an IPC_WaitConnection to the gmainloop world... + */ +GWCSource* +G_main_add_IPC_WaitConnection(int priority +, IPC_WaitConnection* wch +, IPC_Auth* auth_info +, gboolean can_recurse +, gboolean (*dispatch)(IPC_Channel* wch +, gpointer user_data) +, gpointer userdata +, GDestroyNotify notify) +{ + + GWCSource* wcp; + GSource * source = g_source_new(&G_WC_SourceFuncs, + sizeof(GWCSource)); + + wcp = (GWCSource*)source; + + wcp->magno = MAG_GWCSOURCE; + wcp->maxdispatchdelayms = DEFAULT_MAXDELAY; + wcp->maxdispatchms = DEFAULT_MAXDISPATCH; + lc_store((wcp->detecttime), zero_longclock); + wcp->udata = userdata; + wcp->gpfd.fd = wch->ops->get_select_fd(wch); + wcp->gpfd.events = DEF_EVENTS; + wcp->gpfd.revents = 0; + wcp->wch = wch; + wcp->dnotify = notify; + wcp->auth_info = auth_info; + wcp->dispatch = dispatch; + + g_source_add_poll(source, &wcp->gpfd); + + g_source_set_priority(source, priority); + + g_source_set_can_recurse(source, can_recurse); + + wcp->gsourceid = g_source_attach(source, NULL); + wcp->description = "IPC wait for connection"; + + if (wcp->gsourceid == 0) { + g_source_remove_poll(source, &wcp->gpfd); + g_source_unref(source); + source = NULL; + wcp = NULL; + } + return wcp; +} + + +/* Delete the given IPC_WaitConnection from the gmainloop world */ +gboolean +G_main_del_IPC_WaitConnection(GWCSource* wcp) +{ + + GSource* source = (GSource*) wcp; + + + if (wcp->gsourceid <= 0) { + return FALSE; + } + + g_source_remove(wcp->gsourceid); + wcp->gsourceid = 0; + g_source_unref(source); + + return TRUE; +} + + + +/* + * For IPC_WaitConnection events, return FALSE because we + * have to poll to get events. + * + * We don't modify 'timeout' either. + */ +static gboolean +G_WC_prepare(GSource* source, + gint* timeout) +{ + GWCSource* wcp = (GWCSource*)source; + g_assert(IS_WCSOURCE(wcp)); + return FALSE; +} + +/* + * Did we notice any I/O (connection pending) events? + */ + +static gboolean +G_WC_check(GSource * source) +{ + GWCSource* wcp = (GWCSource*)source; + g_assert(IS_WCSOURCE(wcp)); + + if (wcp->gpfd.revents != 0) { + lc_store((wcp->detecttime), time_longclock()); + return TRUE; + } + return FALSE; +} + +/* + * Someone is trying to connect. + * Try to accept the connection and notify the user. + */ +static gboolean +G_WC_dispatch(GSource* source, + GSourceFunc callback, + gpointer user_data) +{ + GWCSource* wcp = (GWCSource*)source; + IPC_Channel* ch; + gboolean rc = TRUE; + int count = 0; + longclock_t dispstart; + + g_assert(IS_WCSOURCE(wcp)); + CHECK_DISPATCH_DELAY(wcp); + + while(1) { + ch = wcp->wch->ops->accept_connection(wcp->wch, wcp->auth_info); + if (ch == NULL) { + if (errno == EBADF) { + cl_perror("%s: Stopping accepting connections(socket=%d)!!" + , __FUNCTION__, wcp->gpfd.fd); + rc = FALSE; + } + break; + } + ++count; + + if(!wcp->dispatch) { + continue; + } + + rc = wcp->dispatch(ch, wcp->udata); + if(!rc) { + g_source_remove_poll(source, &wcp->gpfd); + g_source_unref(source); + break; + } + } + CHECK_DISPATCH_TIME(wcp); + return rc; +} + +/* + * Free up our data, and notify the user process... + */ +static void +G_WC_destroy(GSource* source) +{ + + GWCSource* wcp = (GWCSource*)source; + wcp->gsourceid = 0; + g_assert(IS_WCSOURCE(wcp)); + wcp->wch->ops->destroy(wcp->wch); + if (wcp->dnotify) { + wcp->dnotify(wcp->udata); + } +} + + +/************************************************************ + * Functions for Signals + ***********************************************************/ +static gboolean G_SIG_prepare(GSource* source, + gint* timeout); +static gboolean G_SIG_check(GSource* source); + +static gboolean G_SIG_dispatch(GSource* source, + GSourceFunc callback, + gpointer user_data); +static void G_SIG_destroy(GSource* source); + +static void G_main_signal_handler(int nsig); + +static GSourceFuncs G_SIG_SourceFuncs = { + G_SIG_prepare, + G_SIG_check, + G_SIG_dispatch, + G_SIG_destroy, +}; + +static GSIGSource *G_main_signal_list[_NSIG]; + +void +set_SignalHandler_dnotify(GSIGSource* sig_src, GDestroyNotify notify) +{ + sig_src->dnotify = notify; +} + +/* + * Add an Signal to the gmainloop world... + */ +GSIGSource* +G_main_add_SignalHandler(int priority, int signal, + gboolean (*dispatch)(int nsig, gpointer user_data), + gpointer userdata, GDestroyNotify notify) +{ + GSIGSource* sig_src; + GSource * source = g_source_new(&G_SIG_SourceFuncs, sizeof(GSIGSource)); + gboolean failed = FALSE; + + sig_src = (GSIGSource*)source; + + sig_src->magno = MAG_GSIGSOURCE; + sig_src->maxdispatchdelayms = DEFAULT_MAXDELAY; + sig_src->maxdispatchms = DEFAULT_MAXDISPATCH; + sig_src->signal = signal; + sig_src->dispatch = dispatch; + sig_src->udata = userdata; + sig_src->dnotify = notify; + + sig_src->signal_triggered = FALSE; + + g_source_set_priority(source, priority); + g_source_set_can_recurse(source, FALSE); + + if(G_main_signal_list[signal] != NULL) { + cl_log(LOG_ERR + , "%s: Handler already present for signal %d" + , __FUNCTION__, signal); + failed = TRUE; + } + if(!failed) { + sig_src->gsourceid = g_source_attach(source, NULL); + sig_src->description = "signal"; + if (sig_src->gsourceid < 1) { + cl_log(LOG_ERR + , "%s: Could not attach source for signal %d (%d)" + , __FUNCTION__ + , signal, sig_src->gsourceid); + failed = TRUE; + } + } + + if(failed) { + cl_log(LOG_ERR + , "%s: Signal handler for signal %d NOT added" + , __FUNCTION__, signal); + g_source_remove(sig_src->gsourceid); + g_source_unref(source); + source = NULL; + sig_src = NULL; + } else { + if (debug_level > 1) { + cl_log(LOG_DEBUG + , "%s: Added signal handler for signal %d" + , __FUNCTION__, signal); + } + G_main_signal_list[signal] = sig_src; + CL_SIGNAL(signal, G_main_signal_handler); + /* + * If we don't set this on, then the mainloop poll(2) call + * will never be interrupted by this signal - which sort of + * defeats the whole purpose of a signal handler in a + * mainloop program + */ + cl_signal_set_interrupt(signal, TRUE); + } + return sig_src; +} + + +/* + * Delete a Signal from the gmainloop world... + */ +gboolean +G_main_del_SignalHandler(GSIGSource* sig_src) +{ + GSource* source = (GSource*) sig_src; + + if (sig_src->gsourceid <= 0) { + return FALSE; + } + if(_NSIG <= sig_src->signal) { + g_assert(_NSIG > sig_src->signal); + return FALSE; + } + + CL_SIGNAL(sig_src->signal, NULL); + + sig_src->signal_triggered = FALSE; + g_source_remove(sig_src->gsourceid); + G_main_signal_list[sig_src->signal] = NULL; + sig_src->gsourceid = 0; + g_source_unref(source); + + return TRUE; +} + +static gboolean +G_SIG_prepare(GSource* source, gint* timeoutms) +{ + GSIGSource* sig_src = (GSIGSource*)source; + + g_assert(IS_SIGSOURCE(sig_src)); + + /* Don't let a timing window keep us in poll() forever + * + * The timing window in question looks like this: + * No signal has occurred up to the point of prepare being called. + * Signal comes in _after_ prepare was called, but _before_ poll. + * signal_detected gets set, but no one checks it before going into poll + * We wait in poll forever... It's not a pretty sight :-(. + */ + *timeoutms = 1000; /* Sigh... */ + + if (sig_src->signal_triggered) { + clock_t now; + clock_t diff; + + /* detecttime is reset in the dispatch function */ + if (cmp_longclock(lc_fetch(sig_src->detecttime), zero_longclock) != 0) { + cl_log(LOG_ERR, "%s: detecttime already set?", __FUNCTION__); + return TRUE; + } + /* Otherwise, this is when it was first detected */ + now = cl_times(); + diff = now - sig_src->sh_detecttime; /* How long since signal occurred? */ + lc_store( + sig_src->detecttime, + sub_longclock(time_longclock(), (longclock_t)diff) + ); + return TRUE; + } + return FALSE; +} + +/* + * Did we notice any I/O events? + */ + +static gboolean +G_SIG_check(GSource* source) +{ + + GSIGSource* sig_src = (GSIGSource*)source; + + g_assert(IS_SIGSOURCE(sig_src)); + + if (sig_src->signal_triggered) { + clock_t now; + clock_t diff; + if (cmp_longclock(lc_fetch(sig_src->detecttime), zero_longclock) != 0){ + return TRUE; + } + /* Otherwise, this is when it was first detected */ + now = cl_times(); + diff = now - sig_src->sh_detecttime; + lc_store( + sig_src->detecttime, + sub_longclock(time_longclock(), (longclock_t)diff) + ); + return TRUE; + } + return FALSE; +} + +/* + * Some kind of event occurred - notify the user. + */ +static gboolean +G_SIG_dispatch(GSource * source, + GSourceFunc callback, + gpointer user_data) +{ + GSIGSource* sig_src = (GSIGSource*)source; + longclock_t dispstart; + + g_assert(IS_SIGSOURCE(sig_src)); + CHECK_DISPATCH_DELAY(sig_src); + + sig_src->sh_detecttime = 0UL; + sig_src->signal_triggered = FALSE; + + if(sig_src->dispatch) { + if(!(sig_src->dispatch(sig_src->signal, sig_src->udata))){ + G_main_del_SignalHandler(sig_src); + CHECK_DISPATCH_TIME(sig_src); + return FALSE; + } + } + CHECK_DISPATCH_TIME(sig_src); + + return TRUE; +} + +/* + * Free up our data, and notify the user process... + */ +static void +G_SIG_destroy(GSource* source) +{ + GSIGSource* sig_src = (GSIGSource*)source; + + g_assert(IS_SIGSOURCE(sig_src)); + sig_src->gsourceid = 0; + + if (sig_src->dnotify) { + sig_src->dnotify(sig_src->udata); + } +} + +/* Find and set the correct mainloop input */ + +static void +G_main_signal_handler(int nsig) +{ + GSIGSource* sig_src = NULL; + + if(G_main_signal_list == NULL) { + g_assert(G_main_signal_list != NULL); + return; + } + if(_NSIG <= nsig) { + g_assert(_NSIG > nsig); + return; + } + + sig_src = G_main_signal_list[nsig]; + + if(sig_src == NULL) { + /* cl_log(LOG_CRIT, "No handler for signal -%d", nsig); */ + return; + } + + g_assert(IS_SIGSOURCE(sig_src)); + /* Time from first occurance of signal */ + if (!sig_src->signal_triggered) { + /* Avoid calling longclock_time() on a signal */ + sig_src->sh_detecttime=cl_times(); + } + sig_src->signal_triggered = TRUE; +} + +/* + * Functions to handle child process + */ + +#define WAITALARM 5000L /* milliseconds */ + +static int alarm_count = 0; +static void +G_main_alarm_helper(int nsig) +{ + ++alarm_count; +} + +static gboolean +child_death_dispatch(int sig, gpointer notused) +{ + int status; + pid_t pid; + const int waitflags = WNOHANG; + struct sigaction saveaction; + int childcount = 0; + + /* + * wait3(WNOHANG) isn't _supposed_ to hang + * Unfortunately, it seems to do just that on some OSes. + * + * The workaround is to set an alarm. I don't think for this purpose + * that it matters if siginterrupt(SIGALRM) is set TRUE or FALSE since + * the tiniest little excuse seems to cause the wait3() to finish. + */ + + memset(&saveaction, 0, sizeof(saveaction)); + cl_signal_set_simple_handler(SIGALRM, G_main_alarm_helper, &saveaction); + + alarm_count = 0; + cl_signal_set_interrupt(SIGALRM, TRUE); + setmsrepeattimer(WAITALARM); /* Might as well be persistent ;-) */ + while((pid=wait3(&status, waitflags, NULL)) > 0 + || (pid < 0 && errno == EINTR)) { + cancelmstimer(); + if (pid > 0) { + ++childcount; + ReportProcHasDied(pid, status); + } + setmsrepeattimer(WAITALARM); /* Let's be persistent ;-) */ + } + cancelmstimer(); + cl_signal_set_simple_handler(SIGALRM, saveaction.sa_handler, &saveaction); + + if (pid < 0 && errno != ECHILD) { + cl_perror("%s: wait3() failed" + , __FUNCTION__); + } +#if defined(DEBUG) + if (childcount < 1) { + /* + * This happens when we receive a SIGCHLD after we clear + * 'sig_src->signal_triggered' in G_SIG_dispatch() but + * before the last wait3() call returns no child above. + */ + cl_log(LOG_DEBUG, "NOTE: %s called without children to wait on" + , __FUNCTION__); + } +#endif + if (alarm_count) { + cl_log(LOG_ERR + , "%s: wait3() call hung %d times. childcount = %d" + , __FUNCTION__, alarm_count, childcount); + alarm_count = 0; + } + return TRUE; +} + +void +set_sigchld_proctrack(int priority, unsigned long maxdisptime) +{ + GSIGSource* src = G_main_add_SignalHandler(priority, SIGCHLD + , child_death_dispatch, NULL, NULL); + + G_main_setmaxdispatchdelay((GSource*) src, 100); + G_main_setmaxdispatchtime((GSource*) src, maxdisptime); + G_main_setdescription((GSource*)src, "SIGCHLD"); + return; +} + + +/************************************************************ + * Functions for Trigger inputs + ***********************************************************/ +static gboolean G_TRIG_prepare(GSource* source, + gint* timeout); +static gboolean G_TRIG_check(GSource* source); + +static gboolean G_TRIG_dispatch(GSource* source, + GSourceFunc callback, + gpointer user_data); +static void G_TRIG_destroy(GSource* source); + +static GSourceFuncs G_TRIG_SourceFuncs = { + G_TRIG_prepare, + G_TRIG_check, + G_TRIG_dispatch, + G_TRIG_destroy +}; + +void +set_TriggerHandler_dnotify(GTRIGSource* trig_src, GDestroyNotify notify) +{ + trig_src->dnotify = notify; +} + +/* + * Add an Trigger to the gmainloop world... + */ +GTRIGSource* +G_main_add_TriggerHandler(int priority, + gboolean (*dispatch)(gpointer user_data), + gpointer userdata, GDestroyNotify notify) +{ + GTRIGSource* trig_src = NULL; + GSource * source = g_source_new(&G_TRIG_SourceFuncs, sizeof(GTRIGSource)); + gboolean failed = FALSE; + + trig_src = (GTRIGSource*)source; + + trig_src->magno = MAG_GTRIGSOURCE; + trig_src->maxdispatchdelayms = DEFAULT_MAXDELAY; + trig_src->maxdispatchms = DEFAULT_MAXDISPATCH; + trig_src->dispatch = dispatch; + trig_src->udata = userdata; + trig_src->dnotify = notify; + lc_store((trig_src->detecttime), zero_longclock); + + trig_src->manual_trigger = FALSE; + + g_source_set_priority(source, priority); + g_source_set_can_recurse(source, FALSE); + + if(!failed) { + trig_src->gsourceid = g_source_attach(source, NULL); + trig_src->description = "trigger"; + if (trig_src->gsourceid < 1) { + cl_log(LOG_ERR, "G_main_add_TriggerHandler: Could not attach new source (%d)", + trig_src->gsourceid); + failed = TRUE; + } + } + + if(failed) { + cl_log(LOG_ERR, "G_main_add_TriggerHandler: Trigger handler NOT added"); + g_source_remove(trig_src->gsourceid); + g_source_unref(source); + source = NULL; + trig_src = NULL; + } else { + if (debug_level > 1) { + cl_log(LOG_DEBUG, "G_main_add_TriggerHandler: Added signal manual handler"); + } + } + + return trig_src; +} + +void +G_main_set_trigger(GTRIGSource* source) +{ + GTRIGSource* trig_src = (GTRIGSource*)source; + + g_assert(IS_TRIGSOURCE(trig_src)); + + trig_src->manual_trigger = TRUE; + lc_store((trig_src->detecttime), time_longclock()); +} + + +/* + * Delete a Trigger from the gmainloop world... + */ +gboolean +G_main_del_TriggerHandler(GTRIGSource* trig_src) +{ + GSource* source = (GSource*) trig_src; + + if (trig_src->gsourceid <= 0) { + return FALSE; + } + trig_src->gsourceid = 0; + trig_src->manual_trigger = FALSE; + g_source_remove(trig_src->gsourceid); + g_source_unref(source); + + return TRUE; +} + +static gboolean +G_TRIG_prepare(GSource* source, gint* timeout) +{ + GTRIGSource* trig_src = (GTRIGSource*)source; + + g_assert(IS_TRIGSOURCE(trig_src)); + + + if (trig_src->manual_trigger + && cmp_longclock(lc_fetch(trig_src->detecttime), zero_longclock) == 0) { + lc_store((trig_src->detecttime), time_longclock()); + } + return trig_src->manual_trigger; +} + +/* + * Did we notice any I/O events? + */ + +static gboolean +G_TRIG_check(GSource* source) +{ + + GTRIGSource* trig_src = (GTRIGSource*)source; + + g_assert(IS_TRIGSOURCE(trig_src)); + if (trig_src->manual_trigger + && cmp_longclock(lc_fetch(trig_src->detecttime), zero_longclock) == 0) { + lc_store((trig_src->detecttime), time_longclock()); + } + return trig_src->manual_trigger; +} + +/* + * Some kind of event occurred - notify the user. + */ +static gboolean +G_TRIG_dispatch(GSource * source, + GSourceFunc callback, + gpointer user_data) +{ + GTRIGSource* trig_src = (GTRIGSource*)source; + longclock_t dispstart; + + g_assert(IS_TRIGSOURCE(trig_src)); + CHECK_DISPATCH_DELAY(trig_src); + + trig_src->manual_trigger = FALSE; + + if(trig_src->dispatch) { + if(!(trig_src->dispatch(trig_src->udata))){ + G_main_del_TriggerHandler(trig_src); + CHECK_DISPATCH_TIME(trig_src); + return FALSE; + } + CHECK_DISPATCH_TIME(trig_src); + } + lc_store((trig_src->detecttime), zero_longclock); + + return TRUE; +} + +/* + * Free up our data, and notify the user process... + */ +static void +G_TRIG_destroy(GSource* source) +{ + GTRIGSource* trig_src = (GTRIGSource*)source; + + g_assert(IS_TRIGSOURCE(trig_src)); + trig_src->gsourceid = 0; + + if (trig_src->dnotify) { + trig_src->dnotify(trig_src->udata); + } +} +/* + * Glib mainloop timeout handling code. + * + * These functions work correctly even if someone resets the + * time-of-day clock. The g_main_timeout_add() function does not have + * this property, since it relies on gettimeofday(). + * + * Our functions have the same semantics - except they always work ;-) + * + * This is because we use longclock_t for our time values. + * + */ + + +static gboolean +Gmain_timeout_prepare(GSource* src, gint* timeout); + +static gboolean +Gmain_timeout_check(GSource* src); + +static gboolean +Gmain_timeout_dispatch(GSource* src, GSourceFunc func, gpointer user_data); + +static GSourceFuncs Gmain_timeout_funcs = { + Gmain_timeout_prepare, + Gmain_timeout_check, + Gmain_timeout_dispatch, +}; + + +struct GTimeoutAppend { + COMMON_STRUCTSTART; + longclock_t nexttime; + guint interval; +}; + +#define GTIMEOUT(GS) ((struct GTimeoutAppend*)((void*)(GS))) + +guint +Gmain_timeout_add(guint interval +, GSourceFunc function +, gpointer data) +{ + return Gmain_timeout_add_full(G_PRIORITY_DEFAULT + , interval, function, data, NULL); +} + +guint +Gmain_timeout_add_full(gint priority +, guint interval +, GSourceFunc function +, gpointer data +, GDestroyNotify notify) +{ + + struct GTimeoutAppend* append; + + GSource* source = g_source_new( &Gmain_timeout_funcs, + sizeof(struct GTimeoutAppend)); + + append = GTIMEOUT(source); + append->magno = MAG_GTIMEOUTSRC; + append->maxdispatchms = DEFAULT_MAXDISPATCH; + append->maxdispatchdelayms = DEFAULT_MAXDELAY; + append->description = "(timeout)"; + lc_store((append->detecttime), zero_longclock); + append->udata = NULL; + + append->nexttime = add_longclock(time_longclock() + , msto_longclock(interval)); + append->interval = interval; + + g_source_set_priority(source, priority); + + g_source_set_can_recurse(source, FALSE); + + g_source_set_callback(source, function, data, notify); + + append->gsourceid = g_source_attach(source, NULL); + g_source_unref(source); + return append->gsourceid; + +} + +void +Gmain_timeout_remove(guint tag) +{ + GSource* source = g_main_context_find_source_by_id(NULL,tag); + struct GTimeoutAppend* append = GTIMEOUT(source); + + if (source == NULL){ + cl_log(LOG_ERR, "Attempt to remove timeout (%u)" + " with NULL source", tag); + }else{ + g_assert(IS_TIMEOUTSRC(append)); + g_source_remove(tag); + } + + return; +} + +/* g_main_loop-style prepare function */ +static gboolean +Gmain_timeout_prepare(GSource* src, gint* timeout) +{ + + struct GTimeoutAppend* append = GTIMEOUT(src); + longclock_t lnow = time_longclock(); + longclock_t remain; + + g_assert(IS_TIMEOUTSRC(append)); + if (cmp_longclock(lnow, append->nexttime) >= 0) { + *timeout = 0L; + return TRUE; + } + /* This is safe - we will always have a positive result */ + remain = sub_longclock(append->nexttime, lnow); + /* This is also safe - we started out in 'ms' */ + *timeout = longclockto_ms(remain); + return ((*timeout) == 0); +} + +/* g_main_loop-style check function */ +static gboolean +Gmain_timeout_check (GSource* src) +{ + struct GTimeoutAppend* append = GTIMEOUT(src); + longclock_t lnow = time_longclock(); + + g_assert(IS_TIMEOUTSRC(append)); + if (cmp_longclock(lnow, append->nexttime) >= 0) { + return TRUE; + } + return FALSE; +} + +/* g_main_loop-style dispatch function */ +static gboolean +Gmain_timeout_dispatch(GSource* src, GSourceFunc func, gpointer user_data) +{ + struct GTimeoutAppend* append = GTIMEOUT(src); + longclock_t dispstart; + gboolean ret; + + g_assert(IS_TIMEOUTSRC(append)); + lc_store(append->detecttime, append->nexttime); + CHECK_DISPATCH_DELAY(append); + + + /* Schedule our next dispatch */ + append->nexttime = add_longclock(time_longclock() + , msto_longclock(append->interval)); + + /* Then call the user function */ + ret = func(user_data); + + CHECK_DISPATCH_TIME(append); + return ret; +} +void +G_main_setmaxdispatchdelay(GSource* s, unsigned long delayms) +{ + GFDSource* fdp = (GFDSource*)s; + if (!IS_ONEOFOURS(fdp)) { + cl_log(LOG_ERR + , "Attempt to set max dispatch delay on wrong object"); + return; + } + fdp->maxdispatchdelayms = delayms; +} +void +G_main_setmaxdispatchtime(GSource* s, unsigned long dispatchms) +{ + GFDSource* fdp = (GFDSource*)s; + if (!IS_ONEOFOURS(fdp)) { + cl_log(LOG_ERR + , "Attempt to set max dispatch time on wrong object"); + return; + } + fdp->maxdispatchms = dispatchms; +} +void +G_main_setdescription(GSource* s, const char * description) +{ + GFDSource* fdp = (GFDSource*)s; + if (!IS_ONEOFOURS(fdp)) { + cl_log(LOG_ERR + , "Attempt to set max dispatch time on wrong object"); + return; + } + fdp->description = description; +} +void +G_main_setmaxdispatchdelay_id(guint id, unsigned long delayms) +{ + GSource* source = g_main_context_find_source_by_id(NULL,id); + + if (source) { + G_main_setmaxdispatchdelay(source, delayms); + } +} +void +G_main_setmaxdispatchtime_id(guint id, unsigned long dispatchms) +{ + GSource* source = g_main_context_find_source_by_id(NULL,id); + + if (source) { + G_main_setmaxdispatchtime(source, dispatchms); + } +} +void +G_main_setdescription_id(guint id, const char * description) +{ + GSource* source = g_main_context_find_source_by_id(NULL,id); + + if (source) { + G_main_setdescription(source, description); + } +} +void +G_main_setall_id(guint id, const char * description, unsigned long delay +, unsigned long elapsed) +{ + G_main_setdescription_id(id, description); + G_main_setmaxdispatchdelay_id(id, delay); + G_main_setmaxdispatchtime_id(id, elapsed); +} + +static void TempProcessRegistered(ProcTrack* p); +static void TempProcessDied(ProcTrack* p, int status, int signo +, int exitcode, int waslogged); +static const char* TempProcessName(ProcTrack* p); + +/*********************************************************************** + * Track our temporary child processes... + * + * We run no more than one of each type at once. + * If we need to run some and one is still running we run another one + * when this one exits. + * + * Requests to run a child process don't add up. So, 3 requests to run + * a child while one is running only cause it to be run once more, not + * three times. + * + * The only guarantee is that a new child process will run after a request + * was made. + * + * To create the possibility of running a particular type of child process + * call G_main_add_tempproc_trigger(). + * + * To cause it to be run, call G_main_set_trigger(). + * + ***********************************************************************/ + +static ProcTrack_ops TempProcessTrackOps = { + TempProcessDied, + TempProcessRegistered, + TempProcessName +}; + +/* + * Information for tracking our generic temporary child processes. + */ +struct tempproc_track { + const char * procname; /* name of the process*/ + GTRIGSource* trigger; /* Trigger for this event */ + int (*fun)(gpointer userdata); /* Function to call + * in child process */ + void (*prefork)(gpointer userdata);/* Call before fork */ + void (*postfork)(gpointer userdata);/* Call after fork */ + void (*complete)(gpointer userdata, int status, int signo, int exitcode);/* Call after complete */ + gpointer userdata; /* Info to pass 'fun' */ + gboolean isrunning; /* TRUE if child is running */ + gboolean runagain; /* TRUE if we need to run + * again after child process + * finishes. + */ +}; +static void +TempProcessRegistered(ProcTrack* p) +{ + return; /* Don't need to do much here... */ +} + +static void +TempProcessDied(ProcTrack* p, int status, int signo, int exitcode +, int waslogged) +{ + struct tempproc_track * pt = p->privatedata; + + if (pt->complete) { + if (debug_level > 1) { + cl_log(LOG_DEBUG + , "%s: Calling 'complete' for temp process %s" + , __FUNCTION__, pt->procname); + } + pt->complete(pt->userdata, status, signo, exitcode); + } + + pt->isrunning=FALSE; + if (pt->runagain) { + pt->runagain=FALSE; + + /* Do it again, Sam! */ + G_main_set_trigger(pt->trigger); + + /* Note that we set the trigger for this, we don't + * fork or call the function now. + * + * This allows the mainloop scheduler to decide + * when the fork should happen according to the priority + * of this trigger event - NOT according to the priority + * of general SIGCHLD handling. + */ + } + p->privatedata = NULL; /* Don't free until trigger is destroyed */ + return; +} + +static const char * +TempProcessName(ProcTrack* p) +{ + struct tempproc_track * pt = p->privatedata; + return pt->procname; +} +/* + * Make sure only one copy is running at a time... + */ +static gboolean +TempProcessTrigger(gpointer ginfo) +{ + struct tempproc_track* info = ginfo; + int pid; + + /* Make sure only one copy is running at a time. */ + /* This avoids concurrency problems. */ + if (info->isrunning) { + info->runagain = TRUE; + return TRUE; + } + info->isrunning = TRUE; + + if (info->prefork) { + if (debug_level > 1) { + cl_log(LOG_DEBUG + , "%s: Calling prefork for temp process %s" + , __FUNCTION__, info->procname); + } + info->prefork(info->userdata); + } + if (ANYDEBUG) { + cl_log(LOG_DEBUG, "Forking temp process %s", info->procname); + } + switch ((pid=fork())) { + int rc; + case -1: cl_perror("%s: Can't fork temporary child" + " process [%s]!", __FUNCTION__ + , info->procname); + info->isrunning = FALSE; + break; + + case 0: /* Child */ + if ((rc=info->fun(info->userdata)) == HA_OK) { + exit(0); + } + cl_log(LOG_WARNING + , "%s: %s returns %d", __FUNCTION__ + , info->procname, rc); + exit(1); + break; + default: + /* Fall out */; + + } + if (pid > 0) { + NewTrackedProc(pid, 0, (ANYDEBUG? PT_LOGVERBOSE : PT_LOGNORMAL) + , ginfo, &TempProcessTrackOps); + if (info->postfork) { + if (debug_level > 1) { + cl_log(LOG_DEBUG + , "%s: Calling postfork for temp process %s" + , __FUNCTION__, info->procname); + } + info->postfork(info->userdata); + } + } + return TRUE; +} + +static void +tempproc_destroy_notify(gpointer userdata) +{ + if (userdata != NULL) { + free(userdata); + userdata = NULL; + } +} + +GTRIGSource* +G_main_add_tempproc_trigger(int priority +, int (*triggerfun) (gpointer p) +, const char * procname +, gpointer userdata +, void (*prefork)(gpointer p) +, void (*postfork)(gpointer p) +, void (*complete)(gpointer userdata, int status, int signo, int exitcode)) +{ + + struct tempproc_track* p; + GTRIGSource* ret; + + p = (struct tempproc_track *) malloc(sizeof(struct tempproc_track)); + if (p == NULL) { + return NULL; + } + + memset(p, 0, sizeof(*p)); + p->procname = procname; + p->fun = triggerfun; + p->userdata = userdata; + p->prefork = prefork; + p->postfork = postfork; + p->complete = complete; + + ret = G_main_add_TriggerHandler(priority + , TempProcessTrigger, p, tempproc_destroy_notify); + + if (ret == NULL) { + free(p); + p = NULL; + }else{ + p->trigger = ret; + } + return ret; +} |