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#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/param.h>
#include <signal.h>
#include <sys/wait.h>
#include <sys/ioctl.h>
#include "ltrace.h"
#include "output.h"
#include "read_config_file.h"
#include "options.h"
#include "debug.h"
#ifndef SYSCONFDIR
#define SYSCONFDIR "/etc"
#endif
char *command = NULL;
struct process *list_of_processes = NULL;
int exiting = 0; /* =1 if a SIGINT or SIGTERM has been received */
static void signal_alarm(int sig)
{
struct process *tmp = list_of_processes;
signal(SIGALRM, SIG_DFL);
while (tmp) {
struct opt_p_t *tmp2 = opt_p;
while (tmp2) {
if (tmp->pid == tmp2->pid) {
tmp = tmp->next;
if (!tmp) {
return;
}
break;
}
tmp2 = tmp2->next;
}
debug(2, "Sending SIGSTOP to process %u\n", tmp->pid);
kill(tmp->pid, SIGSTOP);
tmp = tmp->next;
}
}
static void signal_exit(int sig)
{
exiting = 1;
debug(1, "Received interrupt signal; exiting...");
if (opt_o) {
fclose(output);
}
signal(SIGINT, SIG_IGN);
signal(SIGTERM, SIG_IGN);
signal(SIGALRM, signal_alarm);
if (opt_p) {
struct opt_p_t *tmp = opt_p;
while (tmp) {
debug(2, "Sending SIGSTOP to process %u\n", tmp->pid);
kill(tmp->pid, SIGSTOP);
tmp = tmp->next;
}
}
alarm(1);
}
static void normal_exit(void)
{
output_line(0, 0);
if (opt_c) {
show_summary();
}
if (opt_o) {
fclose(output);
}
}
static void guess_cols(void)
{
struct winsize ws;
char *c;
opt_a = DEFAULT_ACOLUMN;
c = getenv("COLUMNS");
if (c && *c) {
char *endptr;
int cols;
cols = strtol(c, &endptr, 0);
if (cols > 0 && !*endptr) {
opt_a = cols * 5 / 8;
}
} else if (ioctl(1, TIOCGWINSZ, &ws) != -1 && ws.ws_col > 0) {
opt_a = ws.ws_col * 5 / 8;
}
}
int main(int argc, char **argv)
{
struct opt_p_t *opt_p_tmp;
char *home;
atexit(normal_exit);
signal(SIGINT, signal_exit); /* Detach processes when interrupted */
signal(SIGTERM, signal_exit); /* ... or killed */
guess_cols();
argv = process_options(argc, argv);
read_config_file(SYSCONFDIR "/ltrace.conf");
home = getenv("HOME");
if (home) {
char path[PATH_MAX];
if (strlen(home) > PATH_MAX - 15) {
fprintf(stderr, "Error: $HOME too long\n");
exit(1);
}
strcpy(path, getenv("HOME"));
strcat(path, "/.ltrace.conf");
read_config_file(path);
}
if (opt_e) {
struct opt_e_t *tmp = opt_e;
while (tmp) {
debug(1, "Option -e: %s\n", tmp->name);
tmp = tmp->next;
}
}
if (command) {
execute_program(open_program(command, 0), argv);
}
opt_p_tmp = opt_p;
while (opt_p_tmp) {
open_pid(opt_p_tmp->pid, 1);
opt_p_tmp = opt_p_tmp->next;
}
while (1) {
process_event(wait_for_something());
}
}
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