diff options
Diffstat (limited to 'erts/etc/unix')
| -rw-r--r-- | erts/etc/unix/run_erl.c | 601 | ||||
| -rw-r--r-- | erts/etc/unix/run_erl.h | 30 | ||||
| -rw-r--r-- | erts/etc/unix/safe_string.c | 123 | ||||
| -rw-r--r-- | erts/etc/unix/safe_string.h | 65 | ||||
| -rw-r--r-- | erts/etc/unix/to_erl.c | 589 |
5 files changed, 33 insertions, 1375 deletions
diff --git a/erts/etc/unix/run_erl.c b/erts/etc/unix/run_erl.c index 2018bc007c..b3f0591b07 100644 --- a/erts/etc/unix/run_erl.c +++ b/erts/etc/unix/run_erl.c @@ -79,81 +79,25 @@ # include <stropts.h> #endif -#include "run_erl.h" +#include "run_erl_common.h" #include "safe_string.h" /* sn_printf, strn_cpy, strn_cat, etc */ -#ifdef O_NONBLOCK -# define DONT_BLOCK_PLEASE O_NONBLOCK -#else -# define DONT_BLOCK_PLEASE O_NDELAY -# ifndef EAGAIN -# define EAGAIN -3898734 -# endif -#endif - -#define noDEBUG - -#define DEFAULT_LOG_GENERATIONS 5 -#define LOG_MAX_GENERATIONS 1000 /* No more than 1000 log files */ -#define LOG_MIN_GENERATIONS 2 /* At least two to switch between */ -#define DEFAULT_LOG_MAXSIZE 100000 -#define LOG_MIN_MAXSIZE 1000 /* Smallast value for changing log file */ -#define LOG_STUBNAME "erlang.log." -#define LOG_PERM 0664 -#define DEFAULT_LOG_ACTIVITY_MINUTES 5 -#define DEFAULT_LOG_ALIVE_MINUTES 15 -#define DEFAULT_LOG_ALIVE_FORMAT "%a %b %e %T %Z %Y" -#define ALIVE_BUFFSIZ 256 - -#define PERM 0600 -#define STATUSFILENAME "/run_erl.log" -#define PIPE_STUBNAME "erlang.pipe" -#define PIPE_STUBLEN strlen(PIPE_STUBNAME) - -#ifndef FILENAME_MAX -#define FILENAME_MAX 250 -#endif - -#ifndef O_SYNC -#define O_SYNC 0 -#define USE_FSYNC 1 -#endif - #define MAX(x,y) ((x) > (y) ? (x) : (y)) -#define FILENAME_BUFSIZ FILENAME_MAX - /* prototypes */ static void usage(char *); -static int create_fifo(char *name, int perm); static int open_pty_master(char **name, int *sfd); static int open_pty_slave(char *name); static void pass_on(pid_t); static void exec_shell(char **); -static void status(const char *format,...); -static void error_logf(int priority, int line, const char *format,...); static void catch_sigchild(int); -static int next_log(int log_num); -static int prev_log(int log_num); -static int find_next_log_num(void); -static int open_log(int log_num, int flags); -static void write_to_log(int* lfd, int* log_num, char* buf, int len); static void daemon_init(void); -static char *simple_basename(char *path); static void init_outbuf(void); static int outbuf_size(void); static void clear_outbuf(void); static char* outbuf_first(void); static void outbuf_delete(int bytes); static void outbuf_append(const char* bytes, int n); -static int write_all(int fd, const char* buf, int len); -static int extract_ctrl_seq(char* buf, int len); -static void set_window_size(unsigned col, unsigned row); - -static ssize_t sf_write(int fd, const void *buffer, size_t len); -static ssize_t sf_read(int fd, void *buffer, size_t len); -static int sf_open(const char *path, int flags, mode_t mode); -static int sf_close(int fd); #ifdef DEBUG static void show_terminal_settings(struct termios *t); @@ -161,20 +105,11 @@ static void show_terminal_settings(struct termios *t); /* static data */ static char fifo1[FILENAME_BUFSIZ], fifo2[FILENAME_BUFSIZ]; -static char statusfile[FILENAME_BUFSIZ]; -static char log_dir[FILENAME_BUFSIZ]; static char pipename[FILENAME_BUFSIZ]; static FILE *stdstatus = NULL; -static int log_generations = DEFAULT_LOG_GENERATIONS; -static int log_maxsize = DEFAULT_LOG_MAXSIZE; -static int log_alive_minutes = DEFAULT_LOG_ALIVE_MINUTES; -static int log_activity_minutes = DEFAULT_LOG_ACTIVITY_MINUTES; -static int log_alive_in_gmt = 0; -static char log_alive_format[ALIVE_BUFFSIZ+1]; static int run_daemon = 0; static char *program_name; static int mfd; /* master pty fd */ -static unsigned protocol_ver = RUN_ERL_LO_VER; /* assume lowest to begin with */ /* * Output buffer. @@ -205,29 +140,13 @@ static char* outbuf_in; LOG_PID|LOG_CONS|LOG_NOWAIT,LOG_USER) #endif -#define ERROR0(Prio,Format) error_logf(Prio,__LINE__,Format"\n") -#define ERROR1(Prio,Format,A1) error_logf(Prio,__LINE__,Format"\n",A1) -#define ERROR2(Prio,Format,A1,A2) error_logf(Prio,__LINE__,Format"\n",A1,A2) - -#ifdef HAVE_STRERROR -# define ADD_ERRNO(Format) "errno=%d '%s'\n"Format"\n",errno,strerror(errno) -#else -# define ADD_ERRNO(Format) "errno=%d\n"Format"\n",errno -#endif -#define ERRNO_ERR0(Prio,Format) error_logf(Prio,__LINE__,ADD_ERRNO(Format)) -#define ERRNO_ERR1(Prio,Format,A1) error_logf(Prio,__LINE__,ADD_ERRNO(Format),A1) - - int main(int argc, char **argv) { int childpid; int sfd = -1; - int fd; - char *p, *ptyslave=NULL; + char *ptyslave=NULL; int i = 1; int off_argv; - int calculated_pipename = 0; - int highest_pipe_num = 0; program_name = argv[0]; @@ -245,122 +164,16 @@ int main(int argc, char **argv) off_argv = i; strn_cpy(pipename, sizeof(pipename), argv[i++]); - strn_cpy(log_dir, sizeof(log_dir), argv[i]); - strn_cpy(statusfile, sizeof(statusfile), log_dir); - strn_cat(statusfile, sizeof(statusfile), STATUSFILENAME); + + erts_run_erl_log_init(run_daemon,argv[i]); #ifdef DEBUG - status("%s: pid is : %d\n", argv[0], getpid()); + erts_run_erl_log_status("%s: pid is : %d\n", argv[0], getpid()); #endif - /* Get values for LOG file handling from the environment */ - if ((p = getenv("RUN_ERL_LOG_ALIVE_MINUTES"))) { - log_alive_minutes = atoi(p); - if (!log_alive_minutes) { - ERROR1(LOG_ERR,"Minimum value for RUN_ERL_LOG_ALIVE_MINUTES is 1 " - "(current value is %s)",p); - } - log_activity_minutes = log_alive_minutes / 3; - if (!log_activity_minutes) { - ++log_activity_minutes; - } - } - if ((p = getenv("RUN_ERL_LOG_ACTIVITY_MINUTES"))) { - log_activity_minutes = atoi(p); - if (!log_activity_minutes) { - ERROR1(LOG_ERR,"Minimum value for RUN_ERL_LOG_ACTIVITY_MINUTES is 1 " - "(current value is %s)",p); - } - } - if ((p = getenv("RUN_ERL_LOG_ALIVE_FORMAT"))) { - if (strlen(p) > ALIVE_BUFFSIZ) { - ERROR1(LOG_ERR, "RUN_ERL_LOG_ALIVE_FORMAT can contain a maximum of " - "%d characters", ALIVE_BUFFSIZ); - } - strn_cpy(log_alive_format, sizeof(log_alive_format), p); - } else { - strn_cpy(log_alive_format, sizeof(log_alive_format), DEFAULT_LOG_ALIVE_FORMAT); - } - if ((p = getenv("RUN_ERL_LOG_ALIVE_IN_UTC")) && strcmp(p,"0")) { - ++log_alive_in_gmt; - } - if ((p = getenv("RUN_ERL_LOG_GENERATIONS"))) { - log_generations = atoi(p); - if (log_generations < LOG_MIN_GENERATIONS) - ERROR1(LOG_ERR,"Minimum RUN_ERL_LOG_GENERATIONS is %d", LOG_MIN_GENERATIONS); - if (log_generations > LOG_MAX_GENERATIONS) - ERROR1(LOG_ERR,"Maximum RUN_ERL_LOG_GENERATIONS is %d", LOG_MAX_GENERATIONS); - } - - if ((p = getenv("RUN_ERL_LOG_MAXSIZE"))) { - log_maxsize = atoi(p); - if (log_maxsize < LOG_MIN_MAXSIZE) - ERROR1(LOG_ERR,"Minimum RUN_ERL_LOG_MAXSIZE is %d", LOG_MIN_MAXSIZE); - } - - /* - * Create FIFOs and open them - */ - - if(*pipename && pipename[strlen(pipename)-1] == '/') { - /* The user wishes us to find a unique pipe name in the specified */ - /* directory */ - DIR *dirp; - struct dirent *direntp; - - calculated_pipename = 1; - dirp = opendir(pipename); - if(!dirp) { - ERRNO_ERR1(LOG_ERR,"Can't access pipe directory '%s'.", pipename); - exit(1); - } - - /* Check the directory for existing pipes */ - - while((direntp=readdir(dirp)) != NULL) { - if(strncmp(direntp->d_name,PIPE_STUBNAME,PIPE_STUBLEN)==0) { - int num = atoi(direntp->d_name+PIPE_STUBLEN+1); - if(num > highest_pipe_num) - highest_pipe_num = num; - } - } - closedir(dirp); - strn_catf(pipename, sizeof(pipename), "%s.%d", - PIPE_STUBNAME, highest_pipe_num+1); - } /* if */ - - for(;;) { - /* write FIFO - is read FIFO for `to_erl' program */ - strn_cpy(fifo1, sizeof(fifo1), pipename); - strn_cat(fifo1, sizeof(fifo1), ".r"); - if (create_fifo(fifo1, PERM) < 0) { - ERRNO_ERR1(LOG_ERR,"Cannot create FIFO %s for writing.", fifo1); - exit(1); - } - - /* read FIFO - is write FIFO for `to_erl' program */ - strn_cpy(fifo2, sizeof(fifo2), pipename); - strn_cat(fifo2, sizeof(fifo2), ".w"); - - /* Check that nobody is running run_erl already */ - if ((fd = sf_open(fifo2, O_WRONLY|DONT_BLOCK_PLEASE, 0)) >= 0) { - /* Open as client succeeded -- run_erl is already running! */ - sf_close(fd); - if (calculated_pipename) { - ++highest_pipe_num; - strn_catf(pipename, sizeof(pipename), "%s.%d", - PIPE_STUBNAME, highest_pipe_num+1); - continue; - } - fprintf(stderr, "Erlang already running on pipe %s.\n", pipename); - exit(1); - } - if (create_fifo(fifo2, PERM) < 0) { - ERRNO_ERR1(LOG_ERR,"Cannot create FIFO %s for reading.", fifo2); - exit(1); - } - break; - } + /* Open read and write fifo */ + if (erts_run_erl_open_fifo(pipename,fifo1,fifo2)) + exit(1); /* * Open master pseudo-terminal @@ -432,7 +245,7 @@ int main(int argc, char **argv) sf_close(2); if (dup(sfd) != 0 || dup(sfd) != 1 || dup(sfd) != 2) { - status("Cannot dup\n"); + erts_run_erl_log_status("Cannot dup\n"); } sf_close(sfd); exec_shell(argv+off_argv); /* exec_shell expects argv[2] to be */ @@ -475,9 +288,7 @@ static void pass_on(pid_t childpid) struct timeval timeout; time_t last_activity; char buf[BUFSIZ]; - char log_alive_buffer[ALIVE_BUFFSIZ+1]; - int lognum; - int rfd, wfd=0, lfd=0; + int rfd, wfd=0; int maxfd; int ready; int got_some = 0; /* from to_erl */ @@ -492,13 +303,12 @@ static void pass_on(pid_t childpid) } #ifdef DEBUG - status("run_erl: %s opened for reading\n", fifo2); + erts_run_erl_log_status("run_erl: %s opened for reading\n", fifo2); #endif /* Open the log file */ - lognum = find_next_log_num(); - lfd = open_log(lognum, O_RDWR|O_APPEND|O_CREAT|O_SYNC); + erts_run_erl_log_open(); /* Enter the work loop */ @@ -517,7 +327,8 @@ static void pass_on(pid_t childpid) writefds_ptr = &writefds; } time(&last_activity); - timeout.tv_sec = log_alive_minutes*60; /* don't assume old BSD bug */ + /* don't assume old BSD bug */ + timeout.tv_sec = erts_run_erl_log_alive_minutes*60; timeout.tv_usec = 0; ready = select(maxfd + 1, &readfds, writefds_ptr, NULL, &timeout); if (ready < 0) { @@ -547,28 +358,7 @@ static void pass_on(pid_t childpid) /* Check how long time we've been inactive */ time(&now); - if(!ready || now - last_activity > log_activity_minutes*60) { - /* Either a time out: 15 minutes without action, */ - /* or something is coming in right now, but it's a long time */ - /* since last time, so let's write a time stamp this message */ - struct tm *tmptr; - if (log_alive_in_gmt) { - tmptr = gmtime(&now); - } else { - tmptr = localtime(&now); - } - if (!strftime(log_alive_buffer, ALIVE_BUFFSIZ, log_alive_format, - tmptr)) { - strn_cpy(log_alive_buffer, sizeof(log_alive_buffer), - "(could not format time in 256 positions " - "with current format string.)"); - } - log_alive_buffer[ALIVE_BUFFSIZ] = '\0'; - - sn_printf(buf, sizeof(buf), "\n===== %s%s\n", - ready?"":"ALIVE ", log_alive_buffer); - write_to_log(&lfd, &lognum, buf, strlen(buf)); - } + erts_run_erl_log_activity(!ready,now,last_activity); } /* @@ -603,7 +393,7 @@ static void pass_on(pid_t childpid) */ if (FD_ISSET(mfd, &readfds)) { #ifdef DEBUG - status("Pty master read; "); + erts_run_erl_log_status("Pty master read; "); #endif if ((len = sf_read(mfd, buf, BUFSIZ)) <= 0) { sf_close(rfd); @@ -621,7 +411,7 @@ static void pass_on(pid_t childpid) exit(0); } - write_to_log(&lfd, &lognum, buf, len); + erts_run_erl_log_write(buf, len); /* * Save in the output queue. @@ -637,7 +427,7 @@ static void pass_on(pid_t childpid) */ if (FD_ISSET(rfd, &readfds)) { #ifdef DEBUG - status("FIFO read; "); + erts_run_erl_log_status("FIFO read; "); #endif if ((len = sf_read(rfd, buf, BUFSIZ)) < 0) { sf_close(rfd); @@ -666,7 +456,7 @@ static void pass_on(pid_t childpid) * should succeed. But in case of error, we just ignore it. */ if ((wfd = sf_open(fifo1, O_WRONLY|DONT_BLOCK_PLEASE, 0)) < 0) { - status("Client expected on FIFO %s, but can't open (len=%d)\n", + erts_run_erl_log_status("Client expected on FIFO %s, but can't open (len=%d)\n", fifo1, len); sf_close(rfd); rfd = sf_open(fifo2, O_RDONLY|DONT_BLOCK_PLEASE, 0); @@ -678,7 +468,7 @@ static void pass_on(pid_t childpid) } else { #ifdef DEBUG - status("run_erl: %s opened for writing\n", fifo1); + erts_run_erl_log_status("run_erl: %s opened for writing\n", fifo1); #endif } } @@ -694,14 +484,15 @@ static void pass_on(pid_t childpid) /* Write the message */ #ifdef DEBUG - status("Pty master write; "); + erts_run_erl_log_status("Pty master write; "); #endif - len = extract_ctrl_seq(buf, len); + len = erts_run_erl_extract_ctrl_seq(buf, len); if(len==1 && buf[0] == '\003') { kill(childpid,SIGINT); - } - else if (len>0 && write_all(mfd, buf, len) != len) { + } + else if (len>0 && erts_run_erl_write_all(mfd, buf, len) != len) + { ERRNO_ERR0(LOG_ERR,"Error in writing to terminal."); sf_close(rfd); if(wfd) sf_close(wfd); @@ -710,7 +501,7 @@ static void pass_on(pid_t childpid) } } #ifdef DEBUG - status("OK\n"); + erts_run_erl_log_status("OK\n"); #endif } } @@ -720,173 +511,6 @@ static void catch_sigchild(int sig) { } -/* - * next_log: - * Returns the index number that follows the given index number. - * (Wrapping after log_generations) - */ -static int next_log(int log_num) { - return log_num>=log_generations?1:log_num+1; -} - -/* - * prev_log: - * Returns the index number that precedes the given index number. - * (Wrapping after log_generations) - */ -static int prev_log(int log_num) { - return log_num<=1?log_generations:log_num-1; -} - -/* - * find_next_log_num() - * Searches through the log directory to check which logs that already - * exist. It finds the "hole" in the sequence, and returns the index - * number for the last log in the log sequence. If there is no hole, index - * 1 is returned. - */ -static int find_next_log_num(void) { - int i, next_gen, log_gen; - DIR *dirp; - struct dirent *direntp; - int log_exists[LOG_MAX_GENERATIONS+1]; - int stub_len = strlen(LOG_STUBNAME); - - /* Initialize exiting log table */ - - for(i=log_generations; i>=0; i--) - log_exists[i] = 0; - dirp = opendir(log_dir); - if(!dirp) { - ERRNO_ERR1(LOG_ERR,"Can't access log directory '%s'", log_dir); - exit(1); - } - - /* Check the directory for existing logs */ - - while((direntp=readdir(dirp)) != NULL) { - if(strncmp(direntp->d_name,LOG_STUBNAME,stub_len)==0) { - int num = atoi(direntp->d_name+stub_len); - if(num < 1 || num > log_generations) - continue; - log_exists[num] = 1; - } - } - closedir(dirp); - - /* Find out the next available log file number */ - - next_gen = 0; - for(i=log_generations; i>=0; i--) { - if(log_exists[i]) - if(next_gen) - break; - else - ; - else - next_gen = i; - } - - /* Find out the current log file number */ - - if(next_gen) - log_gen = prev_log(next_gen); - else - log_gen = 1; - - return log_gen; -} /* find_next_log_num() */ - -/* open_log() - * Opens a log file (with given index) for writing. Writing may be - * at the end or a trucnating write, according to flags. - * A LOGGING STARTED and time stamp message is inserted into the log file - */ -static int open_log(int log_num, int flags) -{ - char buf[FILENAME_MAX]; - time_t now; - struct tm *tmptr; - char log_buffer[ALIVE_BUFFSIZ+1]; - int lfd; - - /* Remove the next log (to keep a "hole" in the log sequence) */ - sn_printf(buf, sizeof(buf), "%s/%s%d", - log_dir, LOG_STUBNAME, next_log(log_num)); - unlink(buf); - - /* Create or continue on the current log file */ - sn_printf(buf, sizeof(buf), "%s/%s%d", log_dir, LOG_STUBNAME, log_num); - if((lfd = sf_open(buf, flags, LOG_PERM))<0){ - ERRNO_ERR1(LOG_ERR,"Can't open log file '%s'.", buf); - exit(1); - } - - /* Write a LOGGING STARTED and time stamp into the log file */ - time(&now); - if (log_alive_in_gmt) { - tmptr = gmtime(&now); - } else { - tmptr = localtime(&now); - } - if (!strftime(log_buffer, ALIVE_BUFFSIZ, log_alive_format, - tmptr)) { - strn_cpy(log_buffer, sizeof(log_buffer), - "(could not format time in 256 positions " - "with current format string.)"); - } - log_buffer[ALIVE_BUFFSIZ] = '\0'; - - sn_printf(buf, sizeof(buf), "\n=====\n===== LOGGING STARTED %s\n=====\n", - log_buffer); - if (write_all(lfd, buf, strlen(buf)) < 0) - status("Error in writing to log.\n"); - -#if USE_FSYNC - fsync(lfd); -#endif - - return lfd; -} - -/* write_to_log() - * Writes a message to a log file. If the current log file is full, - * a new log file is opened. - */ -static void write_to_log(int* lfd, int* log_num, char* buf, int len) -{ - int size; - - /* Decide if new logfile needed, and open if so */ - - size = lseek(*lfd,0,SEEK_END); - if(size+len > log_maxsize) { - sf_close(*lfd); - *log_num = next_log(*log_num); - *lfd = open_log(*log_num, O_RDWR|O_CREAT|O_TRUNC|O_SYNC); - } - - /* Write to log file */ - - if (write_all(*lfd, buf, len) < 0) { - status("Error in writing to log.\n"); - } - -#if USE_FSYNC - fsync(*lfd); -#endif -} - -/* create_fifo() - * Creates a new fifo with the given name and permission. - */ -static int create_fifo(char *name, int perm) -{ - if ((mkfifo(name, perm) < 0) && (errno != EEXIST)) - return -1; - return 0; -} - /* open_pty_master() * Find a master device, open and return fd and slave device name. @@ -1083,9 +707,9 @@ static void exec_shell(char **argv) else argv[0] = sh; argv[1] = "-c"; - status("Args before exec of shell:\n"); + erts_run_erl_log_status("Args before exec of shell:\n"); for (vp = argv, i = 0; *vp; vp++, i++) - status("argv[%d] = %s\n", i, *vp); + erts_run_erl_log_status("argv[%d] = %s\n", i, *vp); if (stdstatus) { fclose(stdstatus); } @@ -1096,26 +720,6 @@ static void exec_shell(char **argv) ERRNO_ERR0(LOG_ERR,"Could not execv"); } -/* status() - * Prints the arguments to a status file - * Works like printf (see vfrpintf) - */ -static void status(const char *format,...) -{ - va_list args; - time_t now; - - if (stdstatus == NULL) - stdstatus = fopen(statusfile, "w"); - if (stdstatus == NULL) - return; - now = time(NULL); - fprintf(stdstatus, "run_erl [%d] %s", (int)getpid(), ctime(&now)); - va_start(args, format); - vfprintf(stdstatus, format, args); - va_end(args); - fflush(stdstatus); -} static void daemon_init(void) /* As R Stevens wants it, to a certain extent anyway... */ @@ -1155,47 +759,10 @@ static void daemon_init(void) run_daemon = 1; } -/* error_logf() - * Prints the arguments to stderr or syslog - * Works like printf (see vfprintf) - */ -static void error_logf(int priority, int line, const char *format, ...) -{ - va_list args; - va_start(args, format); - -#ifdef HAVE_SYSLOG_H - if (run_daemon) { - vsyslog(priority,format,args); - } - else -#endif - { - time_t now = time(NULL); - fprintf(stderr, "run_erl:%d [%d] %s", line, (int)getpid(), ctime(&now)); - vfprintf(stderr, format, args); - } - va_end(args); -} - static void usage(char *pname) { - fprintf(stderr, "Usage: %s (pipe_name|pipe_dir/) log_dir \"command [parameters ...]\"\n", pname); - fprintf(stderr, "\nYou may also set the environment variables RUN_ERL_LOG_GENERATIONS\n"); - fprintf(stderr, "and RUN_ERL_LOG_MAXSIZE to the number of log files to use and the\n"); - fprintf(stderr, "size of the log file when to switch to the next log file\n"); -} - -/* Instead of making sure basename exists, we do our own */ -static char *simple_basename(char *path) -{ - char *ptr; - for (ptr = path; *ptr != '\0'; ++ptr) { - if (*ptr == '/') { - path = ptr + 1; - } - } - return path; + fprintf(stderr, "Usage: "); + fprintf(stderr, RUN_ERL_USAGE, pname); } static void init_outbuf(void) @@ -1266,114 +833,6 @@ static void outbuf_append(const char* buf, int n) outbuf_in += n; } -/* Call write() until entire buffer has been written or error. - * Return len or -1. - */ -static int write_all(int fd, const char* buf, int len) -{ - int left = len; - int written; - for (;;) { - written = sf_write(fd,buf,left); - if (written == left) { - return len; - } - if (written < 0) { - return -1; - } - left -= written; - buf += written; - } -} - -static ssize_t sf_read(int fd, void *buffer, size_t len) { - ssize_t n = 0; - - do { n = read(fd, buffer, len); } while (n < 0 && errno == EINTR); - - return n; -} - -static ssize_t sf_write(int fd, const void *buffer, size_t len) { - ssize_t n = 0; - - do { n = write(fd, buffer, len); } while (n < 0 && errno == EINTR); - - return n; -} - -static int sf_open(const char *path, int type, mode_t mode) { - int fd = 0; - - do { fd = open(path, type, mode); } while(fd < 0 && errno == EINTR); - - return fd; -} -static int sf_close(int fd) { - int res = 0; - - do { res = close(fd); } while(fd < 0 && errno == EINTR); - - return res; -} -/* Extract any control sequences that are ment only for run_erl - * and should not be forwarded to the pty. - */ -static int extract_ctrl_seq(char* buf, int len) -{ - static const char prefix[] = "\033_"; - static const char suffix[] = "\033\\"; - char* bufend = buf + len; - char* start = buf; - char* command; - char* end; - - for (;;) { - start = find_str(start, bufend-start, prefix); - if (!start) break; - - command = start + strlen(prefix); - end = find_str(command, bufend-command, suffix); - if (end) { - unsigned col, row; - if (sscanf(command,"version=%u", &protocol_ver)==1) { - /*fprintf(stderr,"to_erl v%u\n", protocol_ver);*/ - } - else if (sscanf(command,"winsize=%u,%u", &col, &row)==2) { - set_window_size(col,row); - } - else { - ERROR2(LOG_ERR, "Ignoring unknown ctrl command '%.*s'\n", - (int)(end-command), command); - } - - /* Remove ctrl sequence from buf */ - end += strlen(suffix); - memmove(start, end, bufend-end); - bufend -= end - start; - } - else { - ERROR2(LOG_ERR, "Missing suffix in ctrl sequence '%.*s'\n", - (int)(bufend-start), start); - break; - } - } - return bufend - buf; -} - -static void set_window_size(unsigned col, unsigned row) -{ -#ifdef TIOCSWINSZ - struct winsize ws; - ws.ws_col = col; - ws.ws_row = row; - if (ioctl(mfd, TIOCSWINSZ, &ws) < 0) { - ERRNO_ERR0(LOG_ERR,"Failed to set window size"); - } -#endif -} - - #ifdef DEBUG #define S(x) ((x) > 0 ? 1 : 0) diff --git a/erts/etc/unix/run_erl.h b/erts/etc/unix/run_erl.h deleted file mode 100644 index 843cda680c..0000000000 --- a/erts/etc/unix/run_erl.h +++ /dev/null @@ -1,30 +0,0 @@ -/* - * %CopyrightBegin% - * - * Copyright Ericsson AB 2008-2009. All Rights Reserved. - * - * The contents of this file are subject to the Erlang Public License, - * Version 1.1, (the "License"); you may not use this file except in - * compliance with the License. You should have received a copy of the - * Erlang Public License along with this software. If not, it can be - * retrieved online at http://www.erlang.org/. - * - * Software distributed under the License is distributed on an "AS IS" - * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See - * the License for the specific language governing rights and limitations - * under the License. - * - * %CopyrightEnd% - */ - -/* - * The protocol version number used between to_erl and run_erl. - */ -#define RUN_ERL_HI_VER 1 /* My preferred protocol version */ -#define RUN_ERL_LO_VER 0 /* The lowest version I accept to talk with */ - -/* Version history: - * 0: Older, without version handshake - * 1: R12B-3, version handshake + window size ctrl - */ - diff --git a/erts/etc/unix/safe_string.c b/erts/etc/unix/safe_string.c deleted file mode 100644 index a77d9c5456..0000000000 --- a/erts/etc/unix/safe_string.c +++ /dev/null @@ -1,123 +0,0 @@ -/* - * %CopyrightBegin% - * - * Copyright Ericsson AB 2008-2009. All Rights Reserved. - * - * The contents of this file are subject to the Erlang Public License, - * Version 1.1, (the "License"); you may not use this file except in - * compliance with the License. You should have received a copy of the - * Erlang Public License along with this software. If not, it can be - * retrieved online at http://www.erlang.org/. - * - * Software distributed under the License is distributed on an "AS IS" - * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See - * the License for the specific language governing rights and limitations - * under the License. - * - * %CopyrightEnd% - */ -/* - * Module: safe_string.c - * - * This is a bunch of generic string operation - * that are safe regarding buffer overflow. - * - * All string functions terminate the process with an error message - * on buffer overflow. - */ - -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif -#include "safe_string.h" -#include <stdio.h> -#include <string.h> -#include <stdarg.h> -#include <stdlib.h> - - -static void string_overflow_handler(const char* format, ...) -{ - va_list args; - va_start(args, format); - vfprintf(stderr,format,args); - va_end(args); - exit(1); -} - -int vsn_printf(char* dst, size_t size, const char* format, va_list args) -{ - int ret = vsnprintf(dst, size, format, args); - if (ret >= size || ret < 0) { - string_overflow_handler("Buffer truncated '%s'\n",dst); - } - return ret; -} - -int sn_printf(char* dst, size_t size, const char* format, ...) -{ - va_list args; - int ret; - va_start(args, format); - ret = vsn_printf(dst,size,format,args); - va_end(args); - return ret; -} - -int strn_cpy(char* dst, size_t size, const char* src) -{ - return sn_printf(dst,size,"%s",src); -} - -int strn_cat(char* dst, size_t size, const char* src) -{ - return strn_catf(dst,size,"%s",src); -} - -int strn_catf(char* dst, size_t size, const char* format, ...) -{ - int ret; - va_list args; -#ifdef _GNU_SOURCE - int len = strnlen(dst,size); -#else - int len = strlen(dst); -#endif - - if (len >= size) { - string_overflow_handler("Buffer already overflowed '%.*s'\n", - size, dst); - } - va_start(args, format); - ret = vsn_printf(dst+len, size-len, format, args); - va_end(args); - return len+ret; -} - -char* find_str(const char* haystack, int hsize, const char* needle) -{ - int i = 0; - int nsize = strlen(needle); - hsize -= nsize - 1; - for (i=0; i<hsize; i++) { - if (haystack[i]==needle[0] && strncmp(haystack+i,needle,nsize)==0) { - return (char*)(haystack+i); - } - } - return NULL; -} - -#ifndef HAVE_MEMMOVE -void* memmove(void *dest, const void *src, size_t n) -{ - int i; - if (src > dest) { - for (i=0; i<n; i++) ((char*)dest)[i] = ((char*)src)[i]; - } - else { - for (i=(int)(n-1); i>=0; i--) ((char*)dest)[i] = ((char*)src)[i]; - } - return dest; -} -#endif /* HAVE_MEMMOVE */ - diff --git a/erts/etc/unix/safe_string.h b/erts/etc/unix/safe_string.h deleted file mode 100644 index c70e528814..0000000000 --- a/erts/etc/unix/safe_string.h +++ /dev/null @@ -1,65 +0,0 @@ -/* - * %CopyrightBegin% - * - * Copyright Ericsson AB 2008-2009. All Rights Reserved. - * - * The contents of this file are subject to the Erlang Public License, - * Version 1.1, (the "License"); you may not use this file except in - * compliance with the License. You should have received a copy of the - * Erlang Public License along with this software. If not, it can be - * retrieved online at http://www.erlang.org/. - * - * Software distributed under the License is distributed on an "AS IS" - * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See - * the License for the specific language governing rights and limitations - * under the License. - * - * %CopyrightEnd% - */ -/* - * Module: safe_string.h - * - * This is an interface to a bunch of generic string operation - * that are safe regarding buffer overflow. - * - * All string functions terminate the process with an error message - * on buffer overflow. - */ - -#include <stdio.h> -#include <stdarg.h> - -/* Like vsnprintf() - */ -int vsn_printf(char* dst, size_t size, const char* format, va_list args); - -/* Like snprintf() - */ -int sn_printf(char* dst, size_t size, const char* format, ...); - -/* Like strncpy() - * Returns length of copied string. - */ -int strn_cpy(char* dst, size_t size, const char* src); - -/* Almost like strncat() - * size is sizeof entire dst buffer. - * Returns length of resulting string. - */ -int strn_cat(char* dst, size_t size, const char* src); - -/* Combination of strncat() and snprintf() - * size is sizeof entire dst buffer. - * Returns length of resulting string. - */ -int strn_catf(char* dst, size_t size, const char* format, ...); - -/* Simular to strstr() but search size bytes of haystack - * without regard to '\0' characters. - */ -char* find_str(const char* haystack, int size, const char* needle); - -#ifndef HAVE_MEMMOVE -void* memmove(void *dest, const void *src, size_t n); -#endif - diff --git a/erts/etc/unix/to_erl.c b/erts/etc/unix/to_erl.c index d7e1127057..38a94ed9c3 100644 --- a/erts/etc/unix/to_erl.c +++ b/erts/etc/unix/to_erl.c @@ -16,592 +16,9 @@ * * %CopyrightEnd% */ -/* - * Module: to_erl.c - * - * This module implements a process that opens two specified FIFOs, one - * for reading and one for writing; reads from its stdin, and writes what - * it has read to the write FIF0; reads from the read FIFO, and writes to - * its stdout. - * - ________ _________ - | |--<-- pipe.r (fifo1) --<--| | - | to_erl | | run_erl | (parent) - |________|-->-- pipe.w (fifo2) -->--|_________| - ^ master pty - | - | slave pty - ____V____ - | | - | "erl" | (child) - |_________| - */ -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif - -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/time.h> -#include <sys/types.h> -#include <fcntl.h> -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <termios.h> -#include <dirent.h> -#include <signal.h> -#include <errno.h> -#ifdef HAVE_SYS_IOCTL_H -# include <sys/ioctl.h> -#endif - -#include "run_erl.h" -#include "safe_string.h" /* strn_cpy, strn_catf, sn_printf, etc. */ - -#if defined(O_NONBLOCK) -# define DONT_BLOCK_PLEASE O_NONBLOCK -#else -# define DONT_BLOCK_PLEASE O_NDELAY -# if !defined(EAGAIN) -# define EAGAIN -3898734 -# endif -#endif - -#ifdef HAVE_STRERROR -# define STRERROR(x) strerror(x) -#else -# define STRERROR(x) "" -#endif - -#define noDEBUG - -#define PIPE_DIR "/tmp/" -#define PIPE_STUBNAME "erlang.pipe" -#define PIPE_STUBLEN strlen(PIPE_STUBNAME) - -#ifdef DEBUG -#define STATUS(s) { fprintf(stderr, (s)); fflush(stderr); } -#else -#define STATUS(s) -#endif - -#ifndef FILENAME_MAX -#define FILENAME_MAX 250 -#endif - -static struct termios tty_smode, tty_rmode; -static int tty_eof = 0; -static int recv_sig = 0; -static int protocol_ver = RUN_ERL_LO_VER; /* assume lowest to begin with */ - -static int write_all(int fd, const char* buf, int len); -static int window_size_seq(char* buf, size_t bufsz); -static int version_handshake(char* buf, int len, int wfd); -#ifdef DEBUG -static void show_terminal_settings(struct termios *); -#endif - -static void handle_ctrlc(int sig) -{ - /* Reinstall the handler, and signal break flag */ - signal(SIGINT,handle_ctrlc); - recv_sig = SIGINT; -} - -static void handle_sigwinch(int sig) -{ - recv_sig = SIGWINCH; -} - -static void usage(char *pname) -{ - fprintf(stderr, "Usage: %s [-h|-F] [pipe_name|pipe_dir/]\n", pname); - fprintf(stderr, "\t-h\tThis help text.\n"); - fprintf(stderr, "\t-F\tForce connection even though pipe is locked by other to_erl process.\n"); -} - -int main(int argc, char **argv) -{ - char FIFO1[FILENAME_MAX], FIFO2[FILENAME_MAX]; - int i, len, wfd, rfd; - fd_set readfds; - char buf[BUFSIZ]; - char pipename[FILENAME_MAX]; - int pipeIx = 1; - int force_lock = 0; - int got_some = 0; - - if (argc >= 2 && argv[1][0]=='-') { - switch (argv[1][1]) { - case 'h': - usage(argv[0]); - exit(1); - case 'F': - force_lock = 1; - break; - default: - fprintf(stderr,"Invalid option '%s'\n",argv[1]); - exit(1); - } - pipeIx = 2; - } - -#ifdef DEBUG - fprintf(stderr, "%s: pid is : %d\n", argv[0], (int)getpid()); -#endif - - strn_cpy(pipename, sizeof(pipename), - (argv[pipeIx] ? argv[pipeIx] : PIPE_DIR)); - - if(*pipename && pipename[strlen(pipename)-1] == '/') { - /* The user wishes us to find a pipe name in the specified */ - /* directory */ - int highest_pipe_num = 0; - DIR *dirp; - struct dirent *direntp; - - dirp = opendir(pipename); - if(!dirp) { - fprintf(stderr, "Can't access pipe directory %s: %s\n", pipename, strerror(errno)); - exit(1); - } - - /* Check the directory for existing pipes */ - - while((direntp=readdir(dirp)) != NULL) { - if(strncmp(direntp->d_name,PIPE_STUBNAME,PIPE_STUBLEN)==0) { - int num = atoi(direntp->d_name+PIPE_STUBLEN+1); - if(num > highest_pipe_num) - highest_pipe_num = num; - } - } - closedir(dirp); - strn_catf(pipename, sizeof(pipename), (highest_pipe_num?"%s.%d":"%s"), - PIPE_STUBNAME, highest_pipe_num); - } /* if */ - - /* read FIFO */ - sn_printf(FIFO1,sizeof(FIFO1),"%s.r",pipename); - /* write FIFO */ - sn_printf(FIFO2,sizeof(FIFO2),"%s.w",pipename); - - /* Check that nobody is running to_erl on this pipe already */ - if ((wfd = open (FIFO1, O_WRONLY|DONT_BLOCK_PLEASE, 0)) >= 0) { - /* Open as server succeeded -- to_erl is already running! */ - close(wfd); - fprintf(stderr, "Another to_erl process already attached to pipe " - "%s.\n", pipename); - if (force_lock) { - fprintf(stderr, "But we proceed anyway by force (-F).\n"); - } - else { - exit(1); - } - } - - if ((rfd = open (FIFO1, O_RDONLY|DONT_BLOCK_PLEASE, 0)) < 0) { -#ifdef DEBUG - fprintf(stderr, "Could not open FIFO %s for reading.\n", FIFO1); -#endif - fprintf(stderr, "No running Erlang on pipe %s: %s\n", pipename, strerror(errno)); - exit(1); - } -#ifdef DEBUG - fprintf(stderr, "to_erl: %s opened for reading\n", FIFO1); -#endif - - if ((wfd = open (FIFO2, O_WRONLY|DONT_BLOCK_PLEASE, 0)) < 0) { -#ifdef DEBUG - fprintf(stderr, "Could not open FIFO %s for writing.\n", FIFO2); -#endif - fprintf(stderr, "No running Erlang on pipe %s: %s\n", pipename, strerror(errno)); - close(rfd); - exit(1); - } -#ifdef DEBUG - fprintf(stderr, "to_erl: %s opened for writing\n", FIFO2); -#endif - - fprintf(stderr, "Attaching to %s (^D to exit)\n\n", pipename); - - /* Set break handler to our handler */ - signal(SIGINT,handle_ctrlc); - - /* - * Save the current state of the terminal, and set raw mode. - */ - if (tcgetattr(0, &tty_rmode) , 0) { - fprintf(stderr, "Cannot get terminals current mode\n"); - exit(-1); - } - tty_smode = tty_rmode; - tty_eof = '\004'; /* Ctrl+D to exit */ -#ifdef DEBUG - show_terminal_settings(&tty_rmode); -#endif - tty_smode.c_iflag = - 1*BRKINT |/*Signal interrupt on break.*/ - 1*IGNPAR |/*Ignore characters with parity errors.*/ - 1*ISTRIP |/*Strip character.*/ - 0; - -#if 0 -0*IGNBRK |/*Ignore break condition.*/ -0*PARMRK |/*Mark parity errors.*/ -0*INPCK |/*Enable input parity check.*/ -0*INLCR |/*Map NL to CR on input.*/ -0*IGNCR |/*Ignore CR.*/ -0*ICRNL |/*Map CR to NL on input.*/ -0*IUCLC |/*Map upper-case to lower-case on input.*/ -0*IXON |/*Enable start/stop output control.*/ -0*IXANY |/*Enable any character to restart output.*/ -0*IXOFF |/*Enable start/stop input control.*/ -0*IMAXBEL|/*Echo BEL on input line too long.*/ -#endif - - tty_smode.c_oflag = - 1*OPOST |/*Post-process output.*/ - 1*ONLCR |/*Map NL to CR-NL on output.*/ -#ifdef XTABS - 1*XTABS |/*Expand tabs to spaces. (Linux)*/ -#endif -#ifdef OXTABS - 1*OXTABS |/*Expand tabs to spaces. (FreeBSD)*/ -#endif -#ifdef NL0 - 1*NL0 |/*Select newline delays*/ -#endif -#ifdef CR0 - 1*CR0 |/*Select carriage-return delays*/ -#endif -#ifdef TAB0 - 1*TAB0 |/*Select horizontal tab delays*/ -#endif -#ifdef BS0 - 1*BS0 |/*Select backspace delays*/ -#endif -#ifdef VT0 - 1*VT0 |/*Select vertical tab delays*/ -#endif -#ifdef FF0 - 1*FF0 |/*Select form feed delays*/ -#endif - 0; - -#if 0 -0*OLCUC |/*Map lower case to upper on output.*/ -0*OCRNL |/*Map CR to NL on output.*/ -0*ONOCR |/*No CR output at column 0.*/ -0*ONLRET |/*NL performs CR function.*/ -0*OFILL |/*Use fill characters for delay.*/ -0*OFDEL |/*Fill is DEL, else NULL.*/ -0*NL1 | -0*CR1 | -0*CR2 | -0*CR3 | -0*TAB1 | -0*TAB2 | -0*TAB3 |/*Expand tabs to spaces.*/ -0*BS1 | -0*VT1 | -0*FF1 | -#endif - - /* JALI: removed setting the tty_smode.c_cflag flags, since this is not */ - /* advisable if this is a *real* terminal, such as the console. In fact */ - /* this may hang the entire machine, deep, deep down (signalling break */ - /* or toggling the abort switch doesn't help) */ - - tty_smode.c_lflag = - 0; - -#if 0 -0*ISIG |/*Enable signals.*/ -0*ICANON |/*Canonical input (erase and kill processing).*/ -0*XCASE |/*Canonical upper/lower presentation.*/ -0*ECHO |/*Enable echo.*/ -0*ECHOE |/*Echo erase character as BS-SP-BS.*/ -0*ECHOK |/*Echo NL after kill character.*/ -0*ECHONL |/*Echo NL.*/ -0*NOFLSH |/*Disable flush after interrupt or quit.*/ -0*TOSTOP |/*Send SIGTTOU for background output.*/ -0*ECHOCTL|/*Echo control characters as ^char, delete as ^?.*/ -0*ECHOPRT|/*Echo erase character as character erased.*/ -0*ECHOKE |/*BS-SP-BS erase entire line on line kill.*/ -0*FLUSHO |/*Output is being flushed.*/ -0*PENDIN |/*Retype pending input at next read or input character.*/ -0*IEXTEN |/*Enable extended (implementation-defined) functions.*/ -#endif - - tty_smode.c_cc[VMIN] =0;/* Note that VMIN is the same as VEOF! */ - tty_smode.c_cc[VTIME] =0;/* Note that VTIME is the same as VEOL! */ - tty_smode.c_cc[VINTR] =3; - - tcsetattr(0, TCSADRAIN, &tty_smode); - -#ifdef DEBUG - show_terminal_settings(&tty_smode); -#endif - /* - * "Write a ^L to the FIFO which causes the other end to redisplay - * the input line." - * This does not seem to work as was intended in old comment above. - * However, this control character is now (R12B-3) used by run_erl - * to trigger the version handshaking between to_erl and run_erl - * at the start of every new to_erl-session. - */ - - if (write(wfd, "\014", 1) < 0) { - fprintf(stderr, "Error in writing ^L to FIFO.\n"); - } - - /* - * read and write - */ - while (1) { - FD_ZERO(&readfds); - FD_SET(0, &readfds); - FD_SET(rfd, &readfds); - if (select(rfd + 1, &readfds, NULL, NULL, NULL) < 0) { - if (recv_sig) { - FD_ZERO(&readfds); - } - else { - fprintf(stderr, "Error in select.\n"); - break; - } - } - len = 0; - - /* - * Read from terminal and write to FIFO - */ - if (recv_sig) { - switch (recv_sig) { - case SIGINT: - fprintf(stderr, "[Break]\n\r"); - buf[0] = '\003'; - len = 1; - break; - case SIGWINCH: - len = window_size_seq(buf,sizeof(buf)); - break; - default: - fprintf(stderr,"Unexpected signal: %u\n",recv_sig); - } - recv_sig = 0; - } - else if (FD_ISSET(0, &readfds)) { - len = read(0, buf, sizeof(buf)); - if (len <= 0) { - close(rfd); - close(wfd); - if (len < 0) { - fprintf(stderr, "Error in reading from stdin.\n"); - } else { - fprintf(stderr, "[EOF]\n\r"); - } - break; - } - /* check if there is an eof character in input */ - for (i = 0; i < len && buf[i] != tty_eof; i++); - if (buf[i] == tty_eof) { - fprintf(stderr, "[Quit]\n\r"); - break; - } - } - - if (len) { -#ifdef DEBUG - if(write(1, buf, len)); -#endif - if (write_all(wfd, buf, len) != len) { - fprintf(stderr, "Error in writing to FIFO.\n"); - close(rfd); - close(wfd); - break; - } - STATUS("\" OK\r\n"); - } - - /* - * Read from FIFO, write to terminal. - */ - if (FD_ISSET(rfd, &readfds)) { - STATUS("FIFO read: "); - len = read(rfd, buf, BUFSIZ); - if (len < 0 && errno == EAGAIN) { - /* - * No data this time, but the writing end of the FIFO is still open. - * Do nothing. - */ - ; - } else if (len <= 0) { - /* - * Either an error or end of file. In either case, break out - * of the loop. - */ - close(rfd); - close(wfd); - if (len < 0) { - fprintf(stderr, "Error in reading from FIFO.\n"); - } else - fprintf(stderr, "[End]\n\r"); - break; - } else { - if (!got_some) { - if ((len=version_handshake(buf,len,wfd)) < 0) { - close(rfd); - close(wfd); - break; - } - if (protocol_ver >= 1) { - /* Tell run_erl size of terminal window */ - signal(SIGWINCH, handle_sigwinch); - raise(SIGWINCH); - } - got_some = 1; - } - - /* - * We successfully read at least one character. Write what we got. - */ - STATUS("Terminal write: \""); - if (write_all(1, buf, len) != len) { - fprintf(stderr, "Error in writing to terminal.\n"); - close(rfd); - close(wfd); - break; - } - STATUS("\" OK\r\n"); - } - } - } - - /* - * Reset terminal characterstics - * XXX - */ - tcsetattr(0, TCSADRAIN, &tty_rmode); - return 0; -} - -/* Call write() until entire buffer has been written or error. - * Return len or -1. - */ -static int write_all(int fd, const char* buf, int len) -{ - int left = len; - int written; - while (left) { - written = write(fd,buf,left); - if (written < 0) { - return -1; - } - left -= written; - buf += written; - } - return len; -} - -static int window_size_seq(char* buf, size_t bufsz) -{ -#ifdef TIOCGWINSZ - struct winsize ws; - static const char prefix[] = "\033_"; - static const char suffix[] = "\033\\"; - /* This Esc sequence is called "Application Program Command" - and seems suitable to use for our own customized stuff. */ - - if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == 0) { - int len = sn_printf(buf, bufsz, "%swinsize=%u,%u%s", - prefix, ws.ws_col, ws.ws_row, suffix); - return len; - } -#endif /* TIOCGWINSZ */ - return 0; -} - -/* to_erl run_erl - * | | - * |---------- '\014' -------->| (session start) - * | | - * |<---- "[run_erl v1-0]" ----| (version interval) - * | | - * |--- Esc_"version=1"Esc\ -->| (common version) - * | | - */ -static int version_handshake(char* buf, int len, int wfd) -{ - unsigned re_high=0, re_low; - char *end = find_str(buf,len,"]\n"); - - if (end && sscanf(buf,"[run_erl v%u-%u",&re_high,&re_low)==2) { - char wbuf[30]; - int wlen; - - if (re_low > RUN_ERL_HI_VER || re_high < RUN_ERL_LO_VER) { - fprintf(stderr,"Incompatible versions: to_erl=v%u-%u run_erl=v%u-%u\n", - RUN_ERL_HI_VER, RUN_ERL_LO_VER, re_high, re_low); - return -1; - } - /* Choose highest common version */ - protocol_ver = re_high < RUN_ERL_HI_VER ? re_high : RUN_ERL_HI_VER; - - wlen = sn_printf(wbuf, sizeof(wbuf), "\033_version=%u\033\\", - protocol_ver); - if (write_all(wfd, wbuf, wlen) < 0) { - fprintf(stderr,"Failed to send version handshake\n"); - return -1; - } - end += 2; - len -= (end-buf); - memmove(buf,end,len); - - } - else { /* we assume old run_erl without version handshake */ - protocol_ver = 0; - } - - if (re_high != RUN_ERL_HI_VER) { - fprintf(stderr,"run_erl has different version, " - "using common protocol level %u\n", protocol_ver); - } - - return len; -} - -#ifdef DEBUG -#define S(x) ((x) > 0 ? 1 : 0) +#include "to_erl_common.h" -static void show_terminal_settings(struct termios *t) -{ - fprintf(stderr,"c_iflag:\n"); - fprintf(stderr,"Signal interrupt on break: BRKINT %d\n", S(t->c_iflag & BRKINT)); - fprintf(stderr,"Map CR to NL on input: ICRNL %d\n", S(t->c_iflag & ICRNL)); - fprintf(stderr,"Ignore break condition: IGNBRK %d\n", S(t->c_iflag & IGNBRK)); - fprintf(stderr,"Ignore CR: IGNCR %d\n", S(t->c_iflag & IGNCR)); - fprintf(stderr,"Ignore char with par. err's: IGNPAR %d\n", S(t->c_iflag & IGNPAR)); - fprintf(stderr,"Map NL to CR on input: INLCR %d\n", S(t->c_iflag & INLCR)); - fprintf(stderr,"Enable input parity check: INPCK %d\n", S(t->c_iflag & INPCK)); - fprintf(stderr,"Strip character ISTRIP %d\n", S(t->c_iflag & ISTRIP)); - fprintf(stderr,"Enable start/stop input ctrl IXOFF %d\n", S(t->c_iflag & IXOFF)); - fprintf(stderr,"ditto output ctrl IXON %d\n", S(t->c_iflag & IXON)); - fprintf(stderr,"Mark parity errors PARMRK %d\n", S(t->c_iflag & PARMRK)); - fprintf(stderr,"\n"); - fprintf(stderr,"c_oflag:\n"); - fprintf(stderr,"Perform output processing OPOST %d\n", S(t->c_oflag & OPOST)); - fprintf(stderr,"\n"); - fprintf(stderr,"c_cflag:\n"); - fprintf(stderr,"Ignore modem status lines CLOCAL %d\n", S(t->c_cflag & CLOCAL)); - fprintf(stderr,"\n"); - fprintf(stderr,"c_local:\n"); - fprintf(stderr,"Enable echo ECHO %d\n", S(t->c_lflag & ECHO)); - fprintf(stderr,"\n"); - fprintf(stderr,"c_cc:\n"); - fprintf(stderr,"c_cc[VEOF] %d\n", t->c_cc[VEOF]); +int main(int argc,char **argv) { + return to_erl(argc,argv); } -#endif |