17 #include "readwrite.h"
21 int timeoutread(fd,buf,n) int fd; char *buf; int n;
25 r = read(fd,buf,n); saveerrno = errno;
27 errno = saveerrno; return r;
31 substdio ssin = SUBSTDIO_FDBUF(timeoutread,0,ssinbuf,sizeof(ssinbuf));
34 void die() { _exit(1); }
37 if (substdio_puts(subfdoutsmall,s) == -1) die();
39 void outflush(s) char *s;
42 if (substdio_flush(subfdoutsmall) == -1) die();
46 if (substdio_puts(subfdoutsmall,"-ERR ") == -1) die();
47 if (substdio_puts(subfdoutsmall,s) == -1) die();
48 if (substdio_puts(subfdoutsmall,"\r\n") == -1) die();
49 if (substdio_flush(subfdoutsmall) == -1) die();
51 void die_usage() { err("usage: popup hostname subprogram"); die(); }
52 void die_nomem() { err("out of memory"); die(); }
53 void die_pipe() { err("unable to open pipe"); die(); }
54 void die_write() { err("unable to write pipe"); die(); }
55 void die_fork() { err("unable to fork"); die(); }
56 void die_childcrashed() { err("aack, child crashed"); }
57 void die_badauth() { err("authorization failed"); }
59 void err_syntax() { err("syntax error"); }
60 void err_wantuser() { err("USER first"); }
61 void err_authoriz() { err("authorization first"); }
63 void okay() { outflush("+OK \r\n"); }
66 char unique[FMT_ULONG + FMT_ULONG + 3];
68 stralloc username = {0};
75 void doanddie(user,userlen,pass)
77 unsigned int userlen; /* including 0 byte */
85 if (fd_copy(2,1) == -1) die_pipe();
87 if (pipe(pi) == -1) die_pipe();
88 if (pi[0] != 3) die_pipe();
89 switch(child = fork())
96 execvp(*childargs,childargs);
100 substdio_fdbuf(&ssup,write,pi[1],upbuf,sizeof(upbuf));
101 if (substdio_put(&ssup,user,userlen) == -1) die_write();
102 if (substdio_put(&ssup,pass,str_len(pass) + 1) == -1) die_write();
103 if (substdio_puts(&ssup,"<") == -1) die_write();
104 if (substdio_puts(&ssup,unique) == -1) die_write();
105 if (substdio_puts(&ssup,hostname) == -1) die_write();
106 if (substdio_put(&ssup,">",2) == -1) die_write();
107 if (substdio_flush(&ssup) == -1) die_write();
109 for (i = 0;pass[i];++i) pass[i] = 0;
110 for (i = 0;i < sizeof(upbuf);++i) upbuf[i] = 0;
111 if (wait_pid(&wstat,child) == -1) die();
112 if (wait_crashed(wstat)) die_childcrashed();
113 if (wait_exitcode(wstat)) die_badauth();
120 s += fmt_uint(s,getpid());
122 s += fmt_ulong(s,(unsigned long) now());
131 void pop3_user(arg) char *arg;
133 if (!arg) { err_syntax(); return; }
136 if (!stralloc_copys(&username,arg)) die_nomem();
137 if (!stralloc_0(&username)) die_nomem();
139 void pop3_pass(arg) char *arg;
141 if (!seenuser) { err_wantuser(); return; }
142 if (!arg) { err_syntax(); return; }
143 doanddie(username.s,username.len,arg);
145 void pop3_apop(arg) char *arg;
148 if (!arg) { err_syntax(); return; }
149 space = arg + str_chr(arg,' ');
150 if (!*space) { err_syntax(); return; }
152 doanddie(arg,space - arg,space);
155 void pop3_quit() { okay(); die(); }
157 static struct { void (*fun)(); char *text; } pop3cmd[] = {
158 { pop3_user, "user" }
159 , { pop3_pass, "pass" }
160 , { pop3_apop, "apop" }
161 , { pop3_quit, "quit" }
173 for (i = 0;pop3cmd[i].fun;++i)
175 for (j = 0;ch = pop3cmd[i].text[j];++j)
176 if ((cmd[j] != ch) && (cmd[j] != ch - 32))
179 if (!cmd[j] || (cmd[j] == ' '))
181 while (cmd[j] == ' ') ++j;
183 pop3cmd[i].fun((char *) 0);
185 pop3cmd[i].fun(cmd + j);
196 static stralloc cmd = {0};
203 if (!hostname) die_usage();
204 childargs = argv + 2;
205 if (!*childargs) die_usage();
211 if (getln(&ssin,&cmd,&match,'\n') == -1) die();
213 if (cmd.len == 0) die();
214 if (cmd.s[--cmd.len] != '\n') die();
215 if ((cmd.len > 0) && (cmd.s[cmd.len - 1] == '\r')) --cmd.len;
216 cmd.s[cmd.len++] = 0;