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authorLukas Larsson <[email protected]>2013-12-16 16:34:58 +0100
committerLukas Larsson <[email protected]>2014-02-24 15:16:04 +0100
commitaa80261396941ee63758d6b5965a7e075b79b4ee (patch)
tree06aa7dcd6218c572762a4c9efbba235df222c726 /erts/etc/unix/run_erl.c
parentd6ead9a129fbe5a2df335a00e029a88a1f1849a2 (diff)
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erts: Refactor common parts out of run_erl and to_erl
This is in preperation for writing ose version of run_erl and to_erl
Diffstat (limited to 'erts/etc/unix/run_erl.c')
-rw-r--r--erts/etc/unix/run_erl.c601
1 files changed, 30 insertions, 571 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)