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-rw-r--r--erts/etc/unix/run_erl.c649
1 files changed, 609 insertions, 40 deletions
diff --git a/erts/etc/unix/run_erl.c b/erts/etc/unix/run_erl.c
index c8414030ca..debd643da7 100644
--- a/erts/etc/unix/run_erl.c
+++ b/erts/etc/unix/run_erl.c
@@ -1,7 +1,7 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 1996-2013. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -41,13 +41,16 @@
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
-
#ifdef HAVE_WORKING_POSIX_OPENPT
-#ifndef _XOPEN_SOURCE
-#define _XOPEN_SOURCE 600
-#endif
+# ifndef _XOPEN_SOURCE
+ /* On OS X and BSD, we must leave _XOPEN_SOURCE undefined in order for
+ * the prototype of vsyslog() to be included.
+ */
+# if !(defined(__APPLE__) || defined(__FreeBSD__) || defined(__DragonFly__))
+# define _XOPEN_SOURCE 600
+# endif
+# endif
#endif
-
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
@@ -65,6 +68,7 @@
#include <dirent.h>
#include <termios.h>
#include <time.h>
+
#ifdef HAVE_SYSLOG_H
# include <syslog.h>
#endif
@@ -74,6 +78,9 @@
#ifdef HAVE_UTMP_H
# include <utmp.h>
#endif
+#ifdef HAVE_LIBUTIL_H
+# include <libutil.h>
+#endif
#ifdef HAVE_UTIL_H
# include <util.h>
#endif
@@ -84,25 +91,81 @@
# include <stropts.h>
#endif
-#include "run_erl_common.h"
+#include "run_erl.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);
@@ -110,11 +173,20 @@ 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.
@@ -145,13 +217,30 @@ 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;
- char *ptyslave=NULL;
+ int fd;
+ char *p, *ptyslave=NULL;
int i = 1;
int off_argv;
+ int calculated_pipename = 0;
+ int highest_pipe_num = 0;
+ int sleepy_child = 0;
program_name = argv[0];
@@ -162,6 +251,11 @@ int main(int argc, char **argv)
init_outbuf();
+ if (!strcmp(argv[1],"-sleepy-child")) { /* For test purpose only */
+ sleepy_child = 1;
+ ++i;
+ }
+
if (!strcmp(argv[1],"-daemon")) {
daemon_init();
++i;
@@ -169,16 +263,122 @@ int main(int argc, char **argv)
off_argv = i;
strn_cpy(pipename, sizeof(pipename), argv[i++]);
-
- erts_run_erl_log_init(run_daemon,argv[i]);
+ strn_cpy(log_dir, sizeof(log_dir), argv[i]);
+ strn_cpy(statusfile, sizeof(statusfile), log_dir);
+ strn_cat(statusfile, sizeof(statusfile), STATUSFILENAME);
#ifdef DEBUG
- erts_run_erl_log_status("%s: pid is : %d\n", argv[0], getpid());
+ status("%s: pid is : %d\n", argv[0], getpid());
#endif
- /* Open read and write fifo */
- if (erts_run_erl_open_fifo(pipename,fifo1,fifo2))
- exit(1);
+ /* 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 master pseudo-terminal
@@ -198,6 +398,9 @@ int main(int argc, char **argv)
exit(1);
}
if (childpid == 0) {
+ if (sleepy_child)
+ sleep(1);
+
/* Child */
sf_close(mfd);
/* disassociate from control terminal */
@@ -250,7 +453,7 @@ int main(int argc, char **argv)
sf_close(2);
if (dup(sfd) != 0 || dup(sfd) != 1 || dup(sfd) != 2) {
- erts_run_erl_log_status("Cannot dup\n");
+ status("Cannot dup\n");
}
sf_close(sfd);
exec_shell(argv+off_argv); /* exec_shell expects argv[2] to be */
@@ -293,7 +496,9 @@ static void pass_on(pid_t childpid)
struct timeval timeout;
time_t last_activity;
char buf[BUFSIZ];
- int rfd, wfd=0;
+ char log_alive_buffer[ALIVE_BUFFSIZ+1];
+ int lognum;
+ int rfd, wfd=0, lfd=0;
int maxfd;
int ready;
int got_some = 0; /* from to_erl */
@@ -308,12 +513,13 @@ static void pass_on(pid_t childpid)
}
#ifdef DEBUG
- erts_run_erl_log_status("run_erl: %s opened for reading\n", fifo2);
+ status("run_erl: %s opened for reading\n", fifo2);
#endif
/* Open the log file */
- erts_run_erl_log_open();
+ lognum = find_next_log_num();
+ lfd = open_log(lognum, O_RDWR|O_APPEND|O_CREAT|O_SYNC);
/* Enter the work loop */
@@ -332,8 +538,7 @@ static void pass_on(pid_t childpid)
writefds_ptr = &writefds;
}
time(&last_activity);
- /* don't assume old BSD bug */
- timeout.tv_sec = erts_run_erl_log_alive_minutes()*60;
+ timeout.tv_sec = log_alive_minutes*60; /* don't assume old BSD bug */
timeout.tv_usec = 0;
ready = select(maxfd + 1, &readfds, writefds_ptr, NULL, &timeout);
if (ready < 0) {
@@ -363,7 +568,28 @@ static void pass_on(pid_t childpid)
/* Check how long time we've been inactive */
time(&now);
- erts_run_erl_log_activity(!ready,now,last_activity);
+ 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));
+ }
}
/*
@@ -398,7 +624,7 @@ static void pass_on(pid_t childpid)
*/
if (FD_ISSET(mfd, &readfds)) {
#ifdef DEBUG
- erts_run_erl_log_status("Pty master read; ");
+ status("Pty master read; ");
#endif
if ((len = sf_read(mfd, buf, BUFSIZ)) <= 0) {
sf_close(rfd);
@@ -416,7 +642,7 @@ static void pass_on(pid_t childpid)
exit(0);
}
- erts_run_erl_log_write(buf, len);
+ write_to_log(&lfd, &lognum, buf, len);
/*
* Save in the output queue.
@@ -432,7 +658,7 @@ static void pass_on(pid_t childpid)
*/
if (FD_ISSET(rfd, &readfds)) {
#ifdef DEBUG
- erts_run_erl_log_status("FIFO read; ");
+ status("FIFO read; ");
#endif
if ((len = sf_read(rfd, buf, BUFSIZ)) < 0) {
sf_close(rfd);
@@ -461,7 +687,7 @@ 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) {
- erts_run_erl_log_status("Client expected on FIFO %s, but can't open (len=%d)\n",
+ 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);
@@ -473,7 +699,7 @@ static void pass_on(pid_t childpid)
}
else {
#ifdef DEBUG
- erts_run_erl_log_status("run_erl: %s opened for writing\n", fifo1);
+ status("run_erl: %s opened for writing\n", fifo1);
#endif
}
}
@@ -489,15 +715,14 @@ static void pass_on(pid_t childpid)
/* Write the message */
#ifdef DEBUG
- erts_run_erl_log_status("Pty master write; ");
+ status("Pty master write; ");
#endif
- len = erts_run_erl_extract_ctrl_seq(buf, len, mfd);
+ len = extract_ctrl_seq(buf, len);
if(len==1 && buf[0] == '\003') {
kill(childpid,SIGINT);
- }
- else if (len>0 && erts_run_erl_write_all(mfd, buf, len) != len)
- {
+ }
+ else if (len>0 && write_all(mfd, buf, len) != len) {
ERRNO_ERR0(LOG_ERR,"Error in writing to terminal.");
sf_close(rfd);
if(wfd) sf_close(wfd);
@@ -506,7 +731,7 @@ static void pass_on(pid_t childpid)
}
}
#ifdef DEBUG
- erts_run_erl_log_status("OK\n");
+ status("OK\n");
#endif
}
}
@@ -516,25 +741,204 @@ 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.
*/
+#ifdef HAVE_WORKING_POSIX_OPENPT
+ /*
+ * Use openpty() on OpenBSD even if we have posix_openpt()
+ * as there is a race when read from master pty returns 0
+ * if child has not yet opened slave pty.
+ * (maybe other BSD's have the same problem?)
+ */
+# if !(defined(__OpenBSD__) && defined(HAVE_OPENPTY))
+# define TRY_POSIX_OPENPT
+# endif
+#endif
+
static int open_pty_master(char **ptyslave, int *sfdp)
{
int mfd;
/* Use the posix_openpt if working, as this guarantees creation of the
slave device properly. */
-#if defined(HAVE_WORKING_POSIX_OPENPT) || (defined(__sun) && defined(__SVR4))
-# ifdef HAVE_WORKING_POSIX_OPENPT
- if ((mfd = posix_openpt(O_RDWR)) >= 0) {
+#if defined(TRY_POSIX_OPENPT) || (defined(__sun) && defined(__SVR4))
+# ifdef TRY_POSIX_OPENPT
+ mfd = posix_openpt(O_RDWR);
# elif defined(__sun) && defined(__SVR4)
mfd = sf_open("/dev/ptmx", O_RDWR, 0);
+# endif
if (mfd >= 0) {
-# endif
if ((*ptyslave = ptsname(mfd)) != NULL &&
grantpt(mfd) == 0 &&
unlockpt(mfd) == 0) {
@@ -712,9 +1116,9 @@ static void exec_shell(char **argv)
else
argv[0] = sh;
argv[1] = "-c";
- erts_run_erl_log_status("Args before exec of shell:\n");
+ status("Args before exec of shell:\n");
for (vp = argv, i = 0; *vp; vp++, i++)
- erts_run_erl_log_status("argv[%d] = %s\n", i, *vp);
+ status("argv[%d] = %s\n", i, *vp);
if (stdstatus) {
fclose(stdstatus);
}
@@ -725,6 +1129,26 @@ 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... */
@@ -764,10 +1188,47 @@ 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: ");
- fprintf(stderr, RUN_ERL_USAGE, 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;
}
static void init_outbuf(void)
@@ -838,6 +1299,114 @@ 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)