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WebSVN – planix.SVN – Blame – /os/branches/feature-vt/sys/src/cmd/dial/at.c – Rev 2

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#include <u.h>
2 
#include <libc.h>
3 
 
4 
void
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usage(void)
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{
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	fprint(2, "usage: %s [-q] [-t seconds] command\n", argv0);
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	exits("usage");
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}
10 
 
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struct {
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	char	*resp;
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	int	ok;
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} tab[] =
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{
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	{ "ok\n",		1 },
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	{ "connect\n",		1 },
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	{ "no carrier\n",	0 },
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	{ "no dialtone\n",	0 },
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	{ "error\n",		0 },
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	{ "busy\n",		0 },
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	{ "no answer\n",	0 },
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	{ "delayed\n",		0 },
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	{ "blacklisted\n",	0 },
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};
26 
 
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int
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writewithoutcr(int fd, char *p, int i)
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{
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	char *q, *e;
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	/* dump cr's */
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	for(e = p+i; p < e; ){
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		q = memchr(p, '\r', e-p);
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		if(q == nil)
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			break;
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		if(q > p)
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			if(write(fd, p, q-p) < 0)
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				return -1;
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		p = q+1;
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	}
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	if(p < e)
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		if(write(fd, p, e-p) < 0)
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			return -1;
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	return i;
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}
47 
 
48 
int
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readln(int fd, char *buf, int n)
50 
{
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	int c, i, sofar;
52 
 
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	sofar = 0;
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	buf[sofar] = 0;
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	while(sofar < n-1){
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		i = read(fd, buf+sofar, 1);
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		if(i <= 0)
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			return i;
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		c = buf[sofar];
60 
		if(c == '\r')
61 
			continue;
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		sofar++;
63 
		if(c == '\n')
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			break;
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	}
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	buf[sofar] = 0;
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	return sofar;
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}
69 
 
70 
void
71 
docmd(char *cmd, int timeout, int quiet, int consfd)
72 
{
73 
	char buf[4096];
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	int i;
75 
	char *p, *cp;
76 
 
77 
	if(timeout == 0){
78 
		if(*cmd == 'd' || *cmd == 'D')
79 
			timeout = 2*60;
80 
		else
81 
			timeout = 5;
82 
	}
83 
 
84 
	p = smprint("at%s\r", cmd);
85 
	for(cp = p; *cp; cp++){
86 
		write(1, cp, 1);
87 
		sleep(100);
88 
	}
89 
	free(p);
90 
 
91 
	alarm(timeout*1000);
92 
	for(;;){
93 
		i = readln(0, buf, sizeof(buf));
94 
		if(i <= 0){
95 
			rerrstr(buf, sizeof buf);
96 
			exits(buf);
97 
		}
98 
		if(!quiet)
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			writewithoutcr(consfd, buf, i);
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		for(i = 0; i < nelem(tab); i++)
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			if(cistrcmp(buf, tab[i].resp) == 0){
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				if(tab[i].ok)
103 
					goto out;
104 
				else
105 
					exits(buf);
106 
			}
107 
	}
108 
out:
109 
	alarm(0);
110 
}
111 
 
112 
void
113 
main(int argc, char **argv)
114 
{
115 
	int timeout;
116 
	int quiet;
117 
	int i;
118 
	int consfd;
119 
 
120 
	timeout = 0;
121 
	quiet = 0;
122 
	ARGBEGIN {
123 
	case 't':
124 
		timeout = atoi(EARGF(usage()));
125 
		break;
126 
	case 'q':
127 
		quiet = 1;
128 
		break;
129 
	default:
130 
		usage();
131 
	} ARGEND;
132 
 
133 
	if(argc < 1)
134 
		usage();
135 
 
136 
	consfd = open("/dev/cons", ORDWR);
137 
	if(consfd < 0)
138 
		sysfatal("opening /dev/cons: %r");
139 
 
140 
	for(i = 0; i < argc; i++)
141 
		docmd(argv[i], timeout, quiet, consfd);
142 
 
143 
	exits(0);
144 
}