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author | dos-reis <gdr@axiomatics.org> | 2007-08-14 05:14:52 +0000 |
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committer | dos-reis <gdr@axiomatics.org> | 2007-08-14 05:14:52 +0000 |
commit | ab8cc85adde879fb963c94d15675783f2cf4b183 (patch) | |
tree | c202482327f474583b750b2c45dedfc4e4312b1d /src/sman/sman.c.pamphlet | |
download | open-axiom-ab8cc85adde879fb963c94d15675783f2cf4b183.tar.gz |
Initial population.
Diffstat (limited to 'src/sman/sman.c.pamphlet')
-rw-r--r-- | src/sman/sman.c.pamphlet | 1111 |
1 files changed, 1111 insertions, 0 deletions
diff --git a/src/sman/sman.c.pamphlet b/src/sman/sman.c.pamphlet new file mode 100644 index 00000000..d0419627 --- /dev/null +++ b/src/sman/sman.c.pamphlet @@ -0,0 +1,1111 @@ +\documentclass{article} +\usepackage{axiom} + +\title{\$SPAD/src/sman sman} +\author{The Axiom Team} + +\begin{document} +\maketitle + +\begin{abstract} +\end{abstract} +\eject + +\tableofcontents +\eject + +\section{sman.h} +<<sman.h>>= +/* Process control definitions. Used by fork_you and spawn_of_hell */ + +/* When a process dies it kills off everything else */ +#define Die 1 +/* When a process dies, do nothing */ +#define NadaDelShitsky 2 +/* When a process dies start it up again */ +#define DoItAgain 3 + +typedef struct spad_proc { + int proc_id; /* process id of child */ + int death_action; /* one of the above constants */ + char *command; /* sh command line to restart the process */ + struct spad_proc *next; +} SpadProcess; + +@ +\section{sman} +\subsection{includes} +<<includes>>= +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <stdio.h> +#include <pwd.h> +#include <fcntl.h> +#include <termios.h> +#include <errno.h> +#include <sys/time.h> +#include <sys/wait.h> +#include <signal.h> + +#include "axiom-c-macros.h" + +#if defined(SUN4OS5platform) || defined(HP10platform) +#include <sys/stropts.h> +#endif + +#include "com.h" +#include "bsdsignal.h" +#include "sman.h" + +#include "bsdsignal.H1" +#include "sockio-c.H1" +#include "openpty.H1" +#include "sman.H1" + +@ +\subsection{variables} +We add a debug flag so we can print information about what \Tool{sman} +is trying to do. This change is pervasive as it touches nearly every +routine. +<<debugflag>>= +int tpd=0; /* to-print-debug information */ +@ +This line is no longer used. We would completely elide it except that +it would raise spurious issues about deleting credit and/or copyright +information. +\begin{verbatim} +char *start_line = +"AKCL (Austin Kyoto Common Lisp) Version(1.568) Thu Aug 22 16:49:01 EDT 1991\ +\r\nContains Enhancements by W. Schelter\r\n"; +\end{verbatim} +We modified the place where the command list lives. +The command list used to live in +\begin{verbatim} +$AXIOM/../../share/algebra/command.list +\end{verbatim} +but the open source version of the system no longer has a share +subdirectory so we move this to the lib subdirectory. +<<clefprogram>>= +char *ClefProgram = + "$AXIOM/bin/clef -f $AXIOM/lib/command.list -e "; +@ +and we change the command line arguments +<<clefprogram1>>= + ClefProgram = + strcat(ClefCommandLine, " -f $AXIOM/lib/command.list -e "); +@ +<<variables>>= +char *ws_path; /* location of the AXIOM executable */ +int start_clef; /* start clef under spad */ +int start_graphics; /* start the viewman */ +int start_nagman; /* start the nagman */ +int start_ht; /* start hypertex */ +int start_spadclient; /* Start the client spad buffer */ +int start_local_spadclient; /* Start the client spad buffer */ +int use_X; /* Use the X windows environment */ +int server_num; /* AXIOM server number */ +<<debugflag>> + +/************************************************/ +/* definitions of programs which sman can start */ +/************************************************/ + +char *GraphicsProgram = "$AXIOM/lib/viewman"; +char *NagManagerProgram = "$AXIOM/lib/nagman"; +char *HypertexProgram = "$AXIOM/lib/hypertex -s"; +<<clefprogram>> +char *SessionManagerProgram = "$AXIOM/lib/session"; +char *SpadClientProgram = "$AXIOM/lib/spadclient"; +char *PasteFile = NULL; +char *MakeRecordFile = NULL; +char *VerifyRecordFile = NULL; + +SpadProcess *spad_process_list = NULL; +/***************************/ +/* sman defaults file name */ +/***************************/ + +#define SpadDefaultFile "spadprof.input" + +char ClefCommandLine[256]; + +#define BufSize 4096 /* size of communication buffer */ +char big_bad_buf[BufSize]; /* big I/O buffer */ + +Sock *session_io = NULL; /* socket connecting to session manager */ + +/***********************************************************/ +/* Some characters used and externally defined in edible.h */ +/***********************************************************/ + +unsigned char _INTR, _QUIT, _ERASE, _KILL, _EOF, _EOL, _RES1, _RES2; + +/*************************************/ +/* Stuff for opening pseudo-terminal */ +/*************************************/ + +int ptsNum, ptcNum; +char ptsPath[20], ptcPath[20]; + +char **new_envp; /* new environment for AXIOM */ +int child_pid; /* child's process id */ +struct termios oldbuf; /* the original settings */ +struct termios childbuf; /* terminal structure for user i/o */ + + +int nagman_signal=0; +int death_signal = 0; + +@ +\subsection{process\_arguments} +<<processarguments>>= +static void +process_arguments(int argc,char ** argv) +{ + int arg; + if (tpd == 1) fprintf(stderr,"sman:process_arguments entered\n"); + for (arg = 1; arg < argc; arg++) { + if (strcmp(argv[arg], "-debug") == 0) + tpd = 1; + else if (strcmp(argv[arg], "-noclef") == 0) + start_clef = 0; + else if (strcmp(argv[arg], "-clef") == 0) + start_clef = 1; + else if (strcmp(argv[arg], "-gr") == 0) + start_graphics = 1; + else if (strcmp(argv[arg], "-nogr") == 0) + start_graphics = 0; + else if (strcmp(argv[arg], "-nag") == 0) + start_nagman = 1; + else if (strcmp(argv[arg], "-nonag") == 0) + start_nagman = 0; + else if (strcmp(argv[arg], "-ht") == 0) + start_ht = 1; + else if (strcmp(argv[arg], "-noht") == 0) + start_ht = 0; + else if (strcmp(argv[arg], "-iw") == 0) + start_spadclient = 1; + else if (strcmp(argv[arg], "-ihere") == 0) + start_local_spadclient = 1; + else if (strcmp(argv[arg], "-noihere") == 0) + start_local_spadclient = 0; + else if (strcmp(argv[arg], "-noiw") == 0) + start_spadclient = 0; + else if (strcmp(argv[arg], "-ws") == 0) + ws_path = argv[++arg]; + else if (strcmp(argv[arg], "-comp") == 0) + ws_path = "$AXIOM/etc/images/comp"; + else if (strcmp(argv[arg], "-nox") == 0) + { + use_X = 0; + start_local_spadclient = 1; + start_spadclient = 0; + start_ht = 0; + start_graphics = 0; + } + else if (strcmp(argv[arg], "-grprog") == 0) + GraphicsProgram = argv[++arg]; + else if (strcmp(argv[arg], "-nagprog") == 0) + NagManagerProgram = argv[++arg]; + else if (strcmp(argv[arg], "-htprog") == 0) + HypertexProgram = argv[++arg]; + else if (strcmp(argv[arg], "-clefprog") == 0) { + strcpy(ClefCommandLine,argv[++arg]); +<<clefprogram1>> + } + else if (strcmp(argv[arg], "-sessionprog") == 0) + SessionManagerProgram = argv[++arg]; + else if (strcmp(argv[arg], "-clientprog") == 0) + SpadClientProgram = argv[++arg]; + else if (strcmp(argv[arg], "-rm") == 0) + MakeRecordFile = argv[++arg]; + else if (strcmp(argv[arg], "-rv") == 0) + VerifyRecordFile = argv[++arg]; + else if (strcmp(argv[arg], "-paste") == 0) + PasteFile = argv[++arg]; + else { + fprintf(stderr, "Usage: sman <-clef|-noclef> \ +<-gr|-nogr> <-ht|-noht> <-iw|-noiw> <-nag|-nonag> <-nox> <-comp> <-ws spad_workspace> \ +<-grprog path> <-htprog path> <-clefprog path> <-sessionprog path> <-nagprog path> \ +<-clientprog path>\n"); + exit(-1); + } + } + if (tpd == 1) + { fprintf(stderr," sman "); + if (start_clef == 0) + fprintf(stderr,"-noclef "); + else + fprintf(stderr,"-clef "); + if (start_graphics == 0) + fprintf(stderr,"-nogr "); + else + fprintf(stderr,"-gr "); + if (start_nagman == 0) + fprintf(stderr,"-nonag "); + else + fprintf(stderr,"-nag "); + if (start_ht == 0) + fprintf(stderr,"-noht "); + else + fprintf(stderr,"-ht "); + if (start_spadclient == 0) + fprintf(stderr,"-noiw "); + else + fprintf(stderr,"-iw "); + if (start_local_spadclient == 0) + fprintf(stderr,"-noihere "); + else + fprintf(stderr,"-ihere "); + if (start_local_spadclient == 0) + fprintf(stderr,"-noihere "); + else + fprintf(stderr,"-ihere "); + if (use_X == 0) + fprintf(stderr,"-nox "); + fprintf(stderr,"-ws "); + fprintf(stderr,"'%s' ",ws_path); + fprintf(stderr,"-grprog "); + fprintf(stderr,"'%s' ",GraphicsProgram); + fprintf(stderr,"-nagprog "); + fprintf(stderr,"'%s' ",NagManagerProgram); + fprintf(stderr,"-htprog "); + fprintf(stderr,"'%s' ",HypertexProgram); + fprintf(stderr,"-clefprog "); + fprintf(stderr,"'%s' ",ClefCommandLine); + fprintf(stderr,"-sessionprog "); + fprintf(stderr,"'%s' ",SessionManagerProgram); + fprintf(stderr,"-clientprog "); + fprintf(stderr,"'%s' ",SpadClientProgram); + fprintf(stderr,"-rm "); + fprintf(stderr,"'%s' ",MakeRecordFile); + fprintf(stderr,"-rv "); + fprintf(stderr,"'%s' ",VerifyRecordFile); + fprintf(stderr,"-paste "); + fprintf(stderr,"'%s' ",PasteFile); + fprintf(stderr,"\n"); + } + if (tpd == 1) fprintf(stderr,"sman:process_arguments exit\n"); +} + +@ +\subsection{should\_I\_clef} +<<shouldIclef>>= +static int +should_I_clef(void) +{ + return(1); +} + +@ +\subsection{in\_X} +<<inX>>= +static int +in_X(void) +{ + if (getenv("DISPLAY")) return 1; + return 0; +} + +@ +\subsection{set\_up\_defaults} +These are the default values for sman. A '1' value means that +sman will try to start the given process, a '0' value means not +starting the process. + +We do not have replacement code for the [[nagman]] process nor +do we have a copy of the [[nag fortran library]] to test the process. +Until this changes we set [[start_nagman = 0]] in order to disable +starting this process by default. +<<setupdefaults>>= +static void +set_up_defaults(void) +{ + if (tpd == 1) fprintf(stderr,"sman:set_up_defaults entered\n"); + start_clef = should_I_clef(); + start_graphics = 1; + start_nagman = 0; + start_ht = 1; + start_spadclient = 0; + start_local_spadclient = 1; + use_X = isatty(0) && in_X(); + ws_path = "$AXIOM/bin/AXIOMsys"; + if (tpd == 1) fprintf(stderr,"sman:set_up_defaults exit\n"); +} + +@ +\subsection{process\_options} +<<processoptions>>= +static void +process_options(int argc, char **argv) +{ + if (tpd == 1) fprintf(stderr,"sman:process_options entered\n"); + set_up_defaults(); + process_arguments(argc, argv); + if (tpd == 1) fprintf(stderr,"sman:process_options exit\n"); +} + +@ +\subsection{death\_handler} +<<deathhandler>>= +static void +death_handler(int sig) +{ + death_signal = 1; +} + +@ +\subsection{nagman\_handler} +<<nagmanhandler>>= +static void +nagman_handler(int sig) +{ + nagman_signal=1; +} + +@ +\subsection{sman\_catch\_signals} +<<smancatchsignals>>= +static void +sman_catch_signals(void) +{ + + /* Set up the signal handlers for sman */ + bsdSignal(SIGINT, SIG_IGN,RestartSystemCalls); + bsdSignal(SIGTERM, death_handler,RestartSystemCalls); + bsdSignal(SIGQUIT, death_handler,RestartSystemCalls); + bsdSignal(SIGHUP, death_handler,RestartSystemCalls); + bsdSignal(SIGILL, death_handler,RestartSystemCalls); + bsdSignal(SIGTRAP, death_handler,RestartSystemCalls); + bsdSignal(SIGIOT, death_handler,RestartSystemCalls); + bsdSignal(SIGBUS, death_handler,RestartSystemCalls); + bsdSignal(SIGSEGV, death_handler,RestartSystemCalls); + /* don't restart wait call on SIGUSR1 */ + bsdSignal(SIGUSR1, nagman_handler,DontRestartSystemCalls); + /* ONLY nagman should send this. + If an error (such as C-c) interrupts a NAGLINK call, nagman + gets a signal to clean up. We need to start another nagman + almost immediately to process the next NAGLINK request. + Since nagman takes a while to clean up, we treat it specially. + nagman should send a signal (USR1) to sman. + sman should respond by spawning a new nagman. + + so nagman is NOT a DoItAgain but a NadaDelShitsky. + + The USR1 mechanism does not work for HPUX 9 - use DoItAgain + */ + +} + +@ +\subsection{fix\_env} +insert SPADSERVER and SPADNUM variables into the environemnt +<<fixenv>>= +static void +fix_env(char **envp, int spadnum) +{ + int len, i; + char *sn; + for(len = 0; envp[len] != NULL; len++); + new_envp = (char **) malloc((len + 3) * sizeof(char *)); + new_envp[0] = "SPADSERVER=TRUE"; + sn = (char *) malloc(20 * sizeof(char)); + sprintf(sn, "SPADNUM=%d", spadnum); + new_envp[1] = sn; + for(i=0; i<=len; i++) + new_envp[i+2] = envp[i]; +} + +@ +\subsection{init\_term\_io} +<<inittermio>>= +static void +init_term_io(void) +{ + if(!isatty(0)) return; + if( tcgetattr(0, &oldbuf) == -1) { + perror("getting termios"); + return ; /* exit(-1); */ + } + if( tcgetattr(0, &childbuf) == -1) { + perror("getting termios"); + return ; /* exit(-1); */ + } + _INTR = oldbuf.c_cc[VINTR]; + _QUIT = oldbuf.c_cc[VQUIT]; + _ERASE = oldbuf.c_cc[VERASE]; + _KILL = oldbuf.c_cc[VKILL]; + _EOF = oldbuf.c_cc[VEOF]; + _EOL = oldbuf.c_cc[VEOL]; +} + +@ +\subsection{strPrefix} +<<strPrefix>>= +static char * +strPrefix(char *prefix,char * s) +{ + while (*prefix != '\0' && *prefix == *s) { + prefix++; + s++; + } + if (*prefix == '\0') return s; + return NULL; +} + +@ +\subsection{check\_spad\_proc} +<<checkspadproc>>= +static void +check_spad_proc(char *file, char *prefix) +{ + char *num; + int pid; + if ((num = strPrefix(prefix, file))) { + pid = atoi(num); + if (pid > 2) { + kill(pid, 0); + if (kill(pid, 0) == -1 && errno == ESRCH) { + unlink(file); + } + } + } +} + +@ +\subsection{clean\_up\_old\_sockets} +<<cleanupoldsockets>>= +static void +clean_up_old_sockets(void) +{ + char com[512], tmp_file[128]; + FILE *file; + int len; + sprintf(tmp_file, "/tmp/socks.%d", server_num); + sprintf(com, "ls /tmp/.d* /tmp/.s* /tmp/.i* /tmp/.h* 2> %s > %s", + tmp_file, tmp_file); + system(com); + file = fopen(tmp_file, "r"); + if (file == NULL) { + fprintf(stderr, "Can't open socket listing file\n"); + return; + } + while(fgets(com, 512, file) != NULL) { + len = strlen(com); + if (len) com[len-1] = '\0'; + else break; + check_spad_proc(com, "/tmp/.d"); + check_spad_proc(com, "/tmp/.s"); + check_spad_proc(com, "/tmp/.i"); + check_spad_proc(com, "/tmp/.h"); + } + fclose(file); + unlink(tmp_file); +} + +@ +\subsection{fork\_you} +<<forkyou>>= +static SpadProcess * +fork_you(int death_action) +{ + /* fork a new process, giving it a default death action */ + /* return NULL in child, SpadProcess in parent */ + int child_pid = fork(); + SpadProcess *proc; + if (!child_pid) return NULL; + proc = (SpadProcess *) malloc(sizeof(SpadProcess)); + proc->proc_id = child_pid; + proc->death_action = death_action; + proc->command = NULL; + proc->next = spad_process_list; + spad_process_list = proc; + return proc; +} + +@ +\subsection{exec\_command\_env} +<<execcommandenv>>= +static void +exec_command_env(char *command,char ** env) +{ + char new_command[512]; + sprintf(new_command, "exec %s", command); + execle("/bin/sh","/bin/sh", "-c", new_command, 0, env); +} + +@ +\subsection{spawn\_of\_hell} +<<spawnofhell>>= +static SpadProcess * +spawn_of_hell(char *command, int death_action) +{ + SpadProcess *proc = fork_you(death_action); + if (proc != NULL) { + proc->command = command; + return proc; + } + exec_command_env(command, new_envp); + return NULL; +} + +@ +\subsection{start\_the\_spadclient} +run a AXIOM client in the main process +<<startthespadclient>>= +static void +start_the_spadclient(void) +{ + char command[256]; + if (start_clef) +#ifdef RIOSplatform + sprintf(command, + "aixterm -sb -sl 500 -name axiomclient -n AXIOM -T AXIOM -e %s %s", + ClefProgram, SpadClientProgram); +#else + sprintf(command, + "xterm -sb -sl 500 -name axiomclient -n AXIOM -T AXIOM -e %s %s", + ClefProgram, SpadClientProgram); +#endif + else +#ifdef RIOSplatform + sprintf(command, + "aixterm -sb -sl 500 -name axiomclient -n AXIOM -T AXIOM -e %s", + SpadClientProgram); +#else + sprintf(command, + "xterm -sb -sl 500 -name axiomclient -n AXIOM -T AXIOM -e %s", + SpadClientProgram); +#endif + if (tpd == 1) + fprintf(stderr,"sman:start_the_spadclient: %s\n",command); + spawn_of_hell(command, NadaDelShitsky); +} + +@ +\subsection{start\_the\_local\_spadclient} +<<startthelocalspadclient>>= +static void +start_the_local_spadclient(void) +{ + char command[256]; + if (start_clef) + sprintf(command, "%s %s", ClefProgram, SpadClientProgram); + else + sprintf(command, "%s", SpadClientProgram); + if (tpd == 1) + fprintf(stderr,"sman:start_the_local_spadclient: %s\n",command); + spawn_of_hell(command, NadaDelShitsky); +} + +@ +\subsection{start\_the\_nagman} +<<startthenagman>>= +static void +start_the_nagman(void) +{ +#if defined(HP9platform) + spawn_of_hell(NagManagerProgram,DoItAgain); +#else + spawn_of_hell(NagManagerProgram,NadaDelShitsky ); +#endif +} + +@ +\subsection{start\_the\_session\_manager} +<<startthesessionmanager>>= +static void +start_the_session_manager(void) +{ + spawn_of_hell(SessionManagerProgram, Die); +} + +@ +\subsection{start\_the\_hypertex} +<<startthehypertex>>= +static void +start_the_hypertex(void) +{ + char prog[512]; + + if (PasteFile){ + sprintf(prog, "%s -k -ip %s", HypertexProgram, PasteFile); + spawn_of_hell(prog, NadaDelShitsky); + } + else if (MakeRecordFile){ + sprintf(prog, "%s -k -rm %s", HypertexProgram,MakeRecordFile ); + spawn_of_hell(prog, NadaDelShitsky); + } + else if (VerifyRecordFile){ + sprintf(prog, "%s -k -rv %s", HypertexProgram, VerifyRecordFile); + spawn_of_hell(prog, NadaDelShitsky); + } + else spawn_of_hell(HypertexProgram, NadaDelShitsky); +} + +@ +\subsection{start\_the\_graphics} +<<startthegraphics>>= +static void +start_the_graphics(void) +{ + spawn_of_hell(GraphicsProgram, DoItAgain); +} + +@ +\subsection{fork\_Axiom} +<<forkAxiom>>= +/* Start the AXIOM session in a separate process, */ +/* using a pseudo-terminal to catch all input and output */ +static void +fork_Axiom(void) +{ + char augmented_ws_path[256]; /* will append directory path */ + char *tmp_pointer; + SpadProcess *proc; + + proc = fork_you(Die); + child_pid = (proc == NULL ? 0 : proc->proc_id); + switch(child_pid) { + case -1 : + fprintf(stderr, "Can't create a new process \n"); + exit(0); + case 0: + /* Dissasociate from my parents group so all my child processes */ + /* look at my terminal as the controlling terminal for the */ + /* group */ + + if(setsid() < 0) { + perror("Dissassociating from parents group"); + exit(-1); + } + + close(ptsNum); + /* Now reopen the server side, so that pg, su, etc. work properly */ + + if ((ptsNum = open(ptsPath, O_RDWR)) < 0 ) { + perror("fork_Axiom: Failed to reopen server"); + exit(-1); + } +#if defined(SUN4OS5platform) || defined(HP10platform) + ioctl(ptsNum,I_PUSH,"ptem"); + ioctl(ptsNum,I_PUSH,"ldterm"); +#endif + + /* since I am the child, I can close ptc, and dup pts for all its */ + /* standard descriptors */ + + if( (dup2(ptsNum, 0) == -1) || + (dup2(ptsNum, 1) == -1) || + (dup2(ptsNum, 2) == -1) ) { + perror("trying to dupe the child"); + exit(-1); + } + close(ptcNum); + close(ptsNum); + + + /* I also have to turn off echoing, since I am echoing all the */ + /* input myself */ + + childbuf.c_lflag &= ~ECHO; + if( tcsetattr(0, TCSAFLUSH, &childbuf) == -1) { + perror("setting the term buffer"); + exit(-1); + } + strcpy(augmented_ws_path,ws_path); /* write the name */ + strcat(augmented_ws_path," "); /* space */ + strcat(augmented_ws_path,ws_path); /* name again */ + tmp_pointer = (char *) + strrchr(augmented_ws_path,'/'); /*pointer to last / */ + *(++tmp_pointer) = '\0'; + exec_command_env(augmented_ws_path, new_envp); + + /* fprintf(stderr, "Cannot execute the %s system.\n", ws_path); */ + + exit(0); + } +} + +@ +\subsection{start\_the\_Axiom} +<<starttheAxiom>>= +static void +start_the_Axiom(char **envp) +{ + server_num = make_server_number(); + clean_up_old_sockets(); + if (server_num == -1) { + fprintf(stderr, "could not get an AXIOM server number\n"); + exit(-1); + } + if (ptyopen(&ptcNum, &ptsNum, ptcPath, ptsPath) == -1) { + perror("start_the_Axiom: ptyopen failed"); + exit(-1); + } + fix_env(envp, server_num); + fork_Axiom(); + close(ptsNum); +} + +@ +\subsection{clean\_up\_sockets} +<<cleanupsockets>>= +static void +clean_up_sockets(void) +{ + char name[256]; + sprintf(name, "%s%d", SpadServer, server_num); + unlink(name); + sprintf(name, "%s%d", SessionServer, server_num); + unlink(name); + sprintf(name, "%s%d", SessionIOName, server_num); + unlink(name); + sprintf(name, "%s%d", MenuServerName, server_num); + unlink(name); +} + +@ +\subsection{read\_from\_spad\_io} +<<readfromspadio>>= +static void +read_from_spad_io(int ptcNum) +{ + int ret_code = 0, i=0; + static int mes_len =0; + ret_code = read(ptcNum, big_bad_buf, BufSize); + if (ret_code == -1) { + clean_up_sockets(); + exit(-1); + } + if (session_io == NULL) { + if (ret_code < mes_len) + mes_len -= ret_code; + else { + if (mes_len > 0) { + i = mes_len; + mes_len = 0; + } + else + i = 0; + ret_code = write(1, big_bad_buf+i, ret_code-i); + } + } + else + ret_code = swrite(session_io, big_bad_buf, ret_code, + "writing to session man"); + if (ret_code == -1) { + perror("writing output to session manager"); + clean_up_sockets(); + exit(-1); + } +} + +@ +\subsection{read\_from\_manager} +<<readfrommanager>>= +static void +read_from_manager(int ptcNum) +{ + int ret_code; + ret_code = sread(session_io, big_bad_buf, BufSize, "reading session io"); + if (ret_code == -1) { + return; + } + ret_code = write(ptcNum, big_bad_buf, ret_code); + if (ret_code == -1) { + return; + } +} + +@ +\subsection{manage\_spad\_io} +<<managespadio>>= +static void +manage_spad_io(int ptcNum) +{ + int ret_code, i, p; + fd_set rd; + while (1) { + rd = socket_mask; + FD_SET(ptcNum, &rd); + if (session_io != NULL) + FD_SET(session_io->socket, &rd); + ret_code = sselect(FD_SETSIZE, &rd, 0, 0, NULL); + if (ret_code == -1) { + perror("Session manager select"); + clean_up_sockets(); + exit(-1); + } + if (FD_ISSET(ptcNum, &rd)) { + read_from_spad_io(ptcNum); + } + for(i=0; i<2; i++) { + if (server[i].socket > 0 && FD_ISSET(server[i].socket, &rd)) { + p = accept_connection(server+i); + switch(p) { + case SessionIO: + session_io = purpose_table[SessionIO]; + /* printf("connected session manager\n\r");*/ + printf("\n"); + break; + default: + printf("sman: Unkown connection request type: %d\n", p); + break; + } + } + } + if (session_io != NULL && FD_ISSET(session_io->socket, &rd)) { + read_from_manager(ptcNum); + } + } +} + +@ +\subsection{init\_spad\_process\_list} +<<initspadprocesslist>>= +static void +init_spad_process_list(void) +{ + spad_process_list = NULL; +} + +@ +\subsection{print\_spad\_process\_list} +<<printspadprocesslist>>= +#if 0 +static void +print_spad_process_list() +{ + SpadProcess *proc; + for(proc = spad_process_list; proc != NULL; proc = proc->next) + fprintf(stderr, "proc_id = %d, death_action = %d\n", proc->proc_id, + proc->death_action); +} +#endif + +@ +\subsection{find\_child} +<<findchild>>= +static SpadProcess * +find_child(int proc_id) +{ + SpadProcess *proc; + for(proc = spad_process_list; proc != NULL; proc = proc->next) + if (proc->proc_id == proc_id) return proc; + return NULL; +} + +@ +\subsection{kill\_all\_children} +<<killallchildren>>= +static void +kill_all_children(void) +{ + char name[256]; + SpadProcess *proc; + + + for(proc = spad_process_list; proc != NULL; proc = proc->next) { + kill(proc->proc_id, SIGTERM); + } + sprintf(name, "/tmp/hyper%d.input",server_num); + unlink(name); + +} + +@ +\subsection{clean\_up\_terminal} +<<cleanupterminal>>= +static void +clean_up_terminal(void) +{ + tcsetattr(0, TCSAFLUSH, &oldbuf); +} + +@ +\subsection{monitor\_children} +<<monitorchildren>>= +static void +monitor_children(void) +{ + int dead_baby, stat; + SpadProcess *proc; + while (1) { + stat = 0; + dead_baby = wait(&stat); + /* Check the value of dead_baby, since wait may have returned + a pid but subsequently we have received a signal. Yeuch! */ + if (dead_baby == -1 && death_signal) { + kill_all_children(); + clean_up_sockets(); + clean_up_terminal(); + sleep(2); + exit(0); + } + /* Check the value of dead_baby, since wait may have returned + a pid but subsequently we have received a signal. Yeuch! */ + if(dead_baby == -1 && nagman_signal) { + nagman_signal=0; + spawn_of_hell(NagManagerProgram,NadaDelShitsky); + continue; + } + + if (dead_baby == -1) { + fprintf(stderr, "sman: wait returned -1\n"); + continue; + } + proc = find_child(dead_baby); + if (proc == NULL) { + /* fprintf(stderr, "sman: %d is not known to be a child process\n", + dead_baby); + */ + continue; + } + switch(proc->death_action) { + case Die: + kill_all_children(); + clean_up_sockets(); + clean_up_terminal(); + sleep(2); + exit(0); + case NadaDelShitsky: + break; + case DoItAgain: + spawn_of_hell(proc->command, DoItAgain); + break; + } + } +} + +@ +\subsection{main} +The main procedure should return an [[int]]. We change the return value +here and in [[src/include/sman.H1]]. +<<result>>= + return(0); +@ +<<main>>= +int +main(int argc, char *argv[],char *envp[]) +{ + if (tpd == 1) fprintf(stderr,"sman:main entered\n"); + bsdSignal(SIGINT, SIG_IGN,RestartSystemCalls); + process_options(argc, argv); + + init_term_io(); + init_spad_process_list(); + start_the_Axiom(envp); + if (open_server(SessionIOName) == -2) { + fprintf(stderr, "Fatal error opening I/O socket\n"); + clean_up_sockets(); + exit(-1); + } + start_the_session_manager(); + if (start_spadclient) start_the_spadclient(); + if (start_local_spadclient) start_the_local_spadclient(); + if (start_nagman) start_the_nagman(); + if (start_ht) start_the_hypertex(); + if (start_graphics) start_the_graphics(); + sleep(1); + + if (fork_you(Die) != NULL) { + sman_catch_signals(); + monitor_children(); + exit(0); + } + manage_spad_io(ptcNum); + if (tpd == 1) fprintf(stderr,"sman:main exit\n"); +<<result>> +} + +@ +\subsection{sman} +<<sman>>= +#define _SMAN_C + +<<includes>> +<<variables>> +<<processarguments>> +<<shouldIclef>> +<<inX>> +<<setupdefaults>> +<<processoptions>> +<<deathhandler>> +<<nagmanhandler>> +<<smancatchsignals>> +<<fixenv>> +<<inittermio>> +<<strPrefix>> +<<checkspadproc>> +<<cleanupoldsockets>> +<<forkyou>> +<<execcommandenv>> +<<spawnofhell>> +<<startthespadclient>> +<<startthelocalspadclient>> +<<startthenagman>> +<<startthesessionmanager>> +<<startthehypertex>> +<<startthegraphics>> +<<forkAxiom>> +<<starttheAxiom>> +<<cleanupsockets>> +<<readfromspadio>> +<<readfrommanager>> +<<managespadio>> +<<initspadprocesslist>> +<<printspadprocesslist>> +<<findchild>> +<<killallchildren>> +<<cleanupterminal>> +<<monitorchildren>> +<<main>> + +@ +\section{License} +<<license>>= +/* +Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd. +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + - Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + - Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + + - Neither the name of The Numerical ALgorithms Group Ltd. nor the + names of its contributors may be used to endorse or promote products + derived from this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS +IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED +TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A +PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER +OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, +EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +@ +<<*>>= +<<license>> +<<sman>> +@ +\eject +\begin{thebibliography}{99} +\bibitem{1} nothing +\end{thebibliography} +\end{document} |