diff options
Diffstat (limited to 'erts/etc/unix/run_erl.c')
| -rw-r--r-- | erts/etc/unix/run_erl.c | 626 |
1 files changed, 45 insertions, 581 deletions
diff --git a/erts/etc/unix/run_erl.c b/erts/etc/unix/run_erl.c index 2018bc007c..c8414030ca 100644 --- a/erts/etc/unix/run_erl.c +++ b/erts/etc/unix/run_erl.c @@ -3,16 +3,17 @@ * * Copyright Ericsson AB 1996-2013. 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. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. * * %CopyrightEnd% */ @@ -40,9 +41,13 @@ #ifdef HAVE_CONFIG_H # include "config.h" #endif + #ifdef HAVE_WORKING_POSIX_OPENPT +#ifndef _XOPEN_SOURCE #define _XOPEN_SOURCE 600 #endif +#endif + #include <sys/types.h> #include <sys/wait.h> #include <sys/stat.h> @@ -79,81 +84,25 @@ # 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 +110,11 @@ 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 +145,13 @@ 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 +169,16 @@ 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 +250,7 @@ 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 +293,7 @@ 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 +308,12 @@ 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 +332,8 @@ 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 +363,7 @@ 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 +398,7 @@ 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 +416,7 @@ 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 +432,7 @@ 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 +461,7 @@ 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 +473,7 @@ 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 +489,15 @@ 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, mfd); 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 +506,7 @@ static void pass_on(pid_t childpid) } } #ifdef DEBUG - status("OK\n"); + erts_run_erl_log_status("OK\n"); #endif } } @@ -720,173 +516,6 @@ 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 +712,9 @@ 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 +725,6 @@ 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 +764,10 @@ 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 +838,6 @@ 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) |