#include <stdio.h>#include <stdlib.h>#include <ctype.h>#include <string.h>#include <signal.h>#include <time.h>#include "ckpt.h"struct options OPTIONS;static voiddefaults(struct options *opt){	static char default_id[9];	/* FIXME: weak ckpt id generator; also	   may break programs that use the seed */	srand(time(NULL));	sprintf(default_id, "%08x", rand());	opt->ckpt_id = default_id;	opt->ckpt_restartlib = "librestart.so";	opt->ckpt_server = NULL;	opt->ckpt_filename = NULL;	opt->ckpt_signal = SIGTSTP;	opt->ckpt_continue = 0;}struct sigmap_t {	char *name;	int num;};static struct sigmap_t map[] = {	{ "SIGHUP",     SIGHUP    },	{ "SIGINT",     SIGINT    },	{ "SIGQUIT",    SIGQUIT   },	{ "SIGILL",     SIGILL    },	{ "SIGTRAP",    SIGTRAP   },	{ "SIGABRT",    SIGABRT   },	{ "SIGIOT",     SIGIOT    },	{ "SIGBUS",     SIGBUS    },	{ "SIGFPE",     SIGFPE    },	{ "SIGKILL",    SIGKILL   },	{ "SIGUSR1",    SIGUSR1   },	{ "SIGSEGV",    SIGSEGV   },	{ "SIGUSR2",    SIGUSR2   },	{ "SIGPIPE",    SIGPIPE   },	{ "SIGALRM",    SIGALRM   },	{ "SIGTERM",    SIGTERM   },	{ "SIGSTKFLT",  SIGSTKFLT },	{ "SIGCLD",     SIGCLD    },	{ "SIGCHLD",    SIGCHLD   },	{ "SIGCONT",    SIGCONT   },	{ "SIGSTOP",    SIGSTOP   },	{ "SIGTSTP",    SIGTSTP   },	{ "SIGTTIN",    SIGTTIN   },	{ "SIGTTOU",    SIGTTOU   },	{ "SIGURG",     SIGURG    },	{ "SIGXCPU",    SIGXCPU   },	{ "SIGXFSZ",    SIGXFSZ   },	{ "SIGVTALRM",  SIGVTALRM },	{ "SIGPROF",    SIGPROF   },	{ "SIGWINCH",   SIGWINCH  },	{ "SIGPOLL",    SIGPOLL   },	{ "SIGIO",      SIGIO     },	{ "SIGPWR",     SIGPWR    },	{ "SIGSYS",     SIGSYS    },	{ NULL, 0 }};static intmapsig(char *s){	struct sigmap_t *p;	p = map;	while (p->name) {		if (!strcmp(p->name, s))			return p->num;		p++;	}	return -1;}static char *replace_ckptid(char *n, char *id){	int i;	int lenn;	int lenid;	int numid = 0;	char *b, *p, *q;	lenn = strlen(n);	for (i = 0; i < lenn-1; i++)		if (n[i] == '%' && n[i+1] == 'i')			numid++;	if (!numid)		return n;	lenid = strlen(id);	b = malloc((lenn+(numid*lenid)+1)*sizeof(char));	if (!b) {		fprintf(stderr, "Out of memory\n");		exit(1);	}	p = b;	q = n;	while (*q) {		if (*q == '%' && *(q+1) == 'i') {			strcpy(p, id);			p += strlen(id);			q += 2;		} else			*p++ = *q++;	}	return b;}voidget_options(){	char *p;	defaults(&OPTIONS);	p = getenv("CKPT_ID");	if (p) 		OPTIONS.ckpt_id = p;	p = getenv("CKPT_SERVER");	if (p)		OPTIONS.ckpt_server = p;	p = getenv("CKPT_FILENAME");	if (p)		OPTIONS.ckpt_filename = replace_ckptid(p, OPTIONS.ckpt_id);	p = getenv("CKPT_CONTINUE");	if (p)		OPTIONS.ckpt_continue = 1;	p = getenv("CKPT_SIGNAL");	if (p) {		if (isdigit(p[0]))			OPTIONS.ckpt_signal = atoi(p);		else			OPTIONS.ckpt_signal = mapsig(p);	}}voidget_options_argv(int argc, char *argv[]){	get_options();	if (argc > 1)		OPTIONS.ckpt_filename = argv[1];	else {		fprintf(stderr, "usage: restart CKPTFILE\n");		exit(1);	}}