From b732a73bc773789894466b0e5320b2f1fe42c7e9 Mon Sep 17 00:00:00 2001 From: John Denker Date: Fri, 1 Jun 2012 18:58:45 -0700 Subject: original, as downloaded from http://www.qmail.org/netqmail-1.06.tar.gz --- qmail-local.c | 698 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 698 insertions(+) create mode 100644 qmail-local.c (limited to 'qmail-local.c') diff --git a/qmail-local.c b/qmail-local.c new file mode 100644 index 0000000..6fec288 --- /dev/null +++ b/qmail-local.c @@ -0,0 +1,698 @@ +#include +#include +#include "readwrite.h" +#include "sig.h" +#include "env.h" +#include "byte.h" +#include "exit.h" +#include "fork.h" +#include "open.h" +#include "wait.h" +#include "lock.h" +#include "seek.h" +#include "substdio.h" +#include "getln.h" +#include "strerr.h" +#include "subfd.h" +#include "sgetopt.h" +#include "alloc.h" +#include "error.h" +#include "stralloc.h" +#include "fmt.h" +#include "str.h" +#include "now.h" +#include "case.h" +#include "quote.h" +#include "qmail.h" +#include "slurpclose.h" +#include "myctime.h" +#include "gfrom.h" +#include "auto_patrn.h" + +void usage() { strerr_die1x(100,"qmail-local: usage: qmail-local [ -nN ] user homedir local dash ext domain sender aliasempty"); } + +void temp_nomem() { strerr_die1x(111,"Out of memory. (#4.3.0)"); } +void temp_rewind() { strerr_die1x(111,"Unable to rewind message. (#4.3.0)"); } +void temp_childcrashed() { strerr_die1x(111,"Aack, child crashed. (#4.3.0)"); } +void temp_fork() { strerr_die3x(111,"Unable to fork: ",error_str(errno),". (#4.3.0)"); } +void temp_read() { strerr_die3x(111,"Unable to read message: ",error_str(errno),". (#4.3.0)"); } +void temp_slowlock() +{ strerr_die1x(111,"File has been locked for 30 seconds straight. (#4.3.0)"); } +void temp_qmail(fn) char *fn; +{ strerr_die5x(111,"Unable to open ",fn,": ",error_str(errno),". (#4.3.0)"); } + +int flagdoit; +int flag99; + +char *user; +char *homedir; +char *local; +char *dash; +char *ext; +char *host; +char *sender; +char *aliasempty; + +stralloc safeext = {0}; +stralloc ufline = {0}; +stralloc rpline = {0}; +stralloc envrecip = {0}; +stralloc dtline = {0}; +stralloc qme = {0}; +stralloc ueo = {0}; +stralloc cmds = {0}; +stralloc messline = {0}; +stralloc foo = {0}; + +char buf[1024]; +char outbuf[1024]; + +/* child process */ + +char fntmptph[80 + FMT_ULONG * 2]; +char fnnewtph[80 + FMT_ULONG * 2]; +void tryunlinktmp() { unlink(fntmptph); } +void sigalrm() { tryunlinktmp(); _exit(3); } + +void maildir_child(dir) +char *dir; +{ + unsigned long pid; + unsigned long time; + char host[64]; + char *s; + int loop; + struct stat st; + int fd; + substdio ss; + substdio ssout; + + sig_alarmcatch(sigalrm); + if (chdir(dir) == -1) { if (error_temp(errno)) _exit(1); _exit(2); } + pid = getpid(); + host[0] = 0; + gethostname(host,sizeof(host)); + for (loop = 0;;++loop) + { + time = now(); + s = fntmptph; + s += fmt_str(s,"tmp/"); + s += fmt_ulong(s,time); *s++ = '.'; + s += fmt_ulong(s,pid); *s++ = '.'; + s += fmt_strn(s,host,sizeof(host)); *s++ = 0; + if (stat(fntmptph,&st) == -1) if (errno == error_noent) break; + /* really should never get to this point */ + if (loop == 2) _exit(1); + sleep(2); + } + str_copy(fnnewtph,fntmptph); + byte_copy(fnnewtph,3,"new"); + + alarm(86400); + fd = open_excl(fntmptph); + if (fd == -1) _exit(1); + + substdio_fdbuf(&ss,read,0,buf,sizeof(buf)); + substdio_fdbuf(&ssout,write,fd,outbuf,sizeof(outbuf)); + if (substdio_put(&ssout,rpline.s,rpline.len) == -1) goto fail; + if (substdio_put(&ssout,dtline.s,dtline.len) == -1) goto fail; + + switch(substdio_copy(&ssout,&ss)) + { + case -2: tryunlinktmp(); _exit(4); + case -3: goto fail; + } + + if (substdio_flush(&ssout) == -1) goto fail; + if (fsync(fd) == -1) goto fail; + if (close(fd) == -1) goto fail; /* NFS dorks */ + + if (link(fntmptph,fnnewtph) == -1) goto fail; + /* if it was error_exist, almost certainly successful; i hate NFS */ + tryunlinktmp(); _exit(0); + + fail: tryunlinktmp(); _exit(1); +} + +/* end child process */ + +void maildir(fn) +char *fn; +{ + int child; + int wstat; + + if (seek_begin(0) == -1) temp_rewind(); + + switch(child = fork()) + { + case -1: + temp_fork(); + case 0: + maildir_child(fn); + _exit(111); + } + + wait_pid(&wstat,child); + if (wait_crashed(wstat)) + temp_childcrashed(); + switch(wait_exitcode(wstat)) + { + case 0: break; + case 2: strerr_die1x(111,"Unable to chdir to maildir. (#4.2.1)"); + case 3: strerr_die1x(111,"Timeout on maildir delivery. (#4.3.0)"); + case 4: strerr_die1x(111,"Unable to read message. (#4.3.0)"); + default: strerr_die1x(111,"Temporary error on maildir delivery. (#4.3.0)"); + } +} + +void mailfile(fn) +char *fn; +{ + int fd; + substdio ss; + substdio ssout; + int match; + seek_pos pos; + int flaglocked; + + if (seek_begin(0) == -1) temp_rewind(); + + fd = open_append(fn); + if (fd == -1) + strerr_die5x(111,"Unable to open ",fn,": ",error_str(errno),". (#4.2.1)"); + + sig_alarmcatch(temp_slowlock); + alarm(30); + flaglocked = (lock_ex(fd) != -1); + alarm(0); + sig_alarmdefault(); + + seek_end(fd); + pos = seek_cur(fd); + + substdio_fdbuf(&ss,read,0,buf,sizeof(buf)); + substdio_fdbuf(&ssout,write,fd,outbuf,sizeof(outbuf)); + if (substdio_put(&ssout,ufline.s,ufline.len)) goto writeerrs; + if (substdio_put(&ssout,rpline.s,rpline.len)) goto writeerrs; + if (substdio_put(&ssout,dtline.s,dtline.len)) goto writeerrs; + for (;;) + { + if (getln(&ss,&messline,&match,'\n') != 0) + { + strerr_warn3("Unable to read message: ",error_str(errno),". (#4.3.0)",0); + if (flaglocked) seek_trunc(fd,pos); close(fd); + _exit(111); + } + if (!match && !messline.len) break; + if (gfrom(messline.s,messline.len)) + if (substdio_bput(&ssout,">",1)) goto writeerrs; + if (substdio_bput(&ssout,messline.s,messline.len)) goto writeerrs; + if (!match) + { + if (substdio_bputs(&ssout,"\n")) goto writeerrs; + break; + } + } + if (substdio_bputs(&ssout,"\n")) goto writeerrs; + if (substdio_flush(&ssout)) goto writeerrs; + if (fsync(fd) == -1) goto writeerrs; + close(fd); + return; + + writeerrs: + strerr_warn5("Unable to write ",fn,": ",error_str(errno),". (#4.3.0)",0); + if (flaglocked) seek_trunc(fd,pos); + close(fd); + _exit(111); +} + +void mailprogram(prog) +char *prog; +{ + int child; + char *(args[4]); + int wstat; + + if (seek_begin(0) == -1) temp_rewind(); + + switch(child = fork()) + { + case -1: + temp_fork(); + case 0: + args[0] = "/bin/sh"; args[1] = "-c"; args[2] = prog; args[3] = 0; + sig_pipedefault(); + execv(*args,args); + strerr_die3x(111,"Unable to run /bin/sh: ",error_str(errno),". (#4.3.0)"); + } + + wait_pid(&wstat,child); + if (wait_crashed(wstat)) + temp_childcrashed(); + switch(wait_exitcode(wstat)) + { + case 100: + case 64: case 65: case 70: case 76: case 77: case 78: case 112: _exit(100); + case 0: break; + case 99: flag99 = 1; break; + default: _exit(111); + } +} + +unsigned long mailforward_qp = 0; + +void mailforward(recips) +char **recips; +{ + struct qmail qqt; + char *qqx; + substdio ss; + int match; + + if (seek_begin(0) == -1) temp_rewind(); + substdio_fdbuf(&ss,read,0,buf,sizeof(buf)); + + if (qmail_open(&qqt) == -1) temp_fork(); + mailforward_qp = qmail_qp(&qqt); + qmail_put(&qqt,dtline.s,dtline.len); + do + { + if (getln(&ss,&messline,&match,'\n') != 0) { qmail_fail(&qqt); break; } + qmail_put(&qqt,messline.s,messline.len); + } + while (match); + qmail_from(&qqt,ueo.s); + while (*recips) qmail_to(&qqt,*recips++); + qqx = qmail_close(&qqt); + if (!*qqx) return; + strerr_die3x(*qqx == 'D' ? 100 : 111,"Unable to forward message: ",qqx + 1,"."); +} + +void bouncexf() +{ + int match; + substdio ss; + + if (seek_begin(0) == -1) temp_rewind(); + substdio_fdbuf(&ss,read,0,buf,sizeof(buf)); + for (;;) + { + if (getln(&ss,&messline,&match,'\n') != 0) temp_read(); + if (!match) break; + if (messline.len <= 1) + break; + if (messline.len == dtline.len) + if (!str_diffn(messline.s,dtline.s,dtline.len)) + strerr_die1x(100,"This message is looping: it already has my Delivered-To line. (#5.4.6)"); + } +} + +void checkhome() +{ + struct stat st; + + if (stat(".",&st) == -1) + strerr_die3x(111,"Unable to stat home directory: ",error_str(errno),". (#4.3.0)"); + if (st.st_mode & auto_patrn) + strerr_die1x(111,"Uh-oh: home directory is writable. (#4.7.0)"); + if (st.st_mode & 01000) + if (flagdoit) + strerr_die1x(111,"Home directory is sticky: user is editing his .qmail file. (#4.2.1)"); + else + strerr_warn1("Warning: home directory is sticky.",0); +} + +int qmeox(dashowner) +char *dashowner; +{ + struct stat st; + + if (!stralloc_copys(&qme,".qmail")) temp_nomem(); + if (!stralloc_cats(&qme,dash)) temp_nomem(); + if (!stralloc_cat(&qme,&safeext)) temp_nomem(); + if (!stralloc_cats(&qme,dashowner)) temp_nomem(); + if (!stralloc_0(&qme)) temp_nomem(); + if (stat(qme.s,&st) == -1) + { + if (error_temp(errno)) temp_qmail(qme.s); + return -1; + } + return 0; +} + +int qmeexists(fd,cutable) +int *fd; +int *cutable; +{ + struct stat st; + + if (!stralloc_0(&qme)) temp_nomem(); + + *fd = open_read(qme.s); + if (*fd == -1) { + if (error_temp(errno)) temp_qmail(qme.s); + if (errno == error_perm) temp_qmail(qme.s); + if (errno == error_acces) temp_qmail(qme.s); + return 0; + } + + if (fstat(*fd,&st) == -1) temp_qmail(qme.s); + if ((st.st_mode & S_IFMT) == S_IFREG) { + if (st.st_mode & auto_patrn) + strerr_die1x(111,"Uh-oh: .qmail file is writable. (#4.7.0)"); + *cutable = !!(st.st_mode & 0100); + return 1; + } + close(*fd); + return 0; +} + +/* "" "": "" */ +/* "-/" "": "-/" "-/default" */ +/* "-/" "a": "-/a" "-/default" */ +/* "-/" "a-": "-/a-" "-/a-default" "-/default" */ +/* "-/" "a-b": "-/a-b" "-/a-default" "-/default" */ +/* "-/" "a-b-": "-/a-b-" "-/a-b-default" "-/a-default" "-/default" */ +/* "-/" "a-b-c": "-/a-b-c" "-/a-b-default" "-/a-default" "-/default" */ + +void qmesearch(fd,cutable) +int *fd; +int *cutable; +{ + int i; + + if (!stralloc_copys(&qme,".qmail")) temp_nomem(); + if (!stralloc_cats(&qme,dash)) temp_nomem(); + if (!stralloc_cat(&qme,&safeext)) temp_nomem(); + if (qmeexists(fd,cutable)) { + if (safeext.len >= 7) { + i = safeext.len - 7; + if (!byte_diff("default",7,safeext.s + i)) + if (i <= str_len(ext)) /* paranoia */ + if (!env_put2("DEFAULT",ext + i)) temp_nomem(); + } + return; + } + + for (i = safeext.len;i >= 0;--i) + if (!i || (safeext.s[i - 1] == '-')) { + if (!stralloc_copys(&qme,".qmail")) temp_nomem(); + if (!stralloc_cats(&qme,dash)) temp_nomem(); + if (!stralloc_catb(&qme,safeext.s,i)) temp_nomem(); + if (!stralloc_cats(&qme,"default")) temp_nomem(); + if (qmeexists(fd,cutable)) { + if (i <= str_len(ext)) /* paranoia */ + if (!env_put2("DEFAULT",ext + i)) temp_nomem(); + return; + } + } + + *fd = -1; +} + +unsigned long count_file = 0; +unsigned long count_forward = 0; +unsigned long count_program = 0; +char count_buf[FMT_ULONG]; + +void count_print() +{ + substdio_puts(subfdoutsmall,"did "); + substdio_put(subfdoutsmall,count_buf,fmt_ulong(count_buf,count_file)); + substdio_puts(subfdoutsmall,"+"); + substdio_put(subfdoutsmall,count_buf,fmt_ulong(count_buf,count_forward)); + substdio_puts(subfdoutsmall,"+"); + substdio_put(subfdoutsmall,count_buf,fmt_ulong(count_buf,count_program)); + substdio_puts(subfdoutsmall,"\n"); + if (mailforward_qp) + { + substdio_puts(subfdoutsmall,"qp "); + substdio_put(subfdoutsmall,count_buf,fmt_ulong(count_buf,mailforward_qp)); + substdio_puts(subfdoutsmall,"\n"); + } + substdio_flush(subfdoutsmall); +} + +void sayit(type,cmd,len) +char *type; +char *cmd; +int len; +{ + substdio_puts(subfdoutsmall,type); + substdio_put(subfdoutsmall,cmd,len); + substdio_putsflush(subfdoutsmall,"\n"); +} + +void main(argc,argv) +int argc; +char **argv; +{ + int opt; + int i; + int j; + int k; + int fd; + int numforward; + char **recips; + datetime_sec starttime; + int flagforwardonly; + char *x; + + umask(077); + sig_pipeignore(); + + if (!env_init()) temp_nomem(); + + flagdoit = 1; + while ((opt = getopt(argc,argv,"nN")) != opteof) + switch(opt) + { + case 'n': flagdoit = 0; break; + case 'N': flagdoit = 1; break; + default: + usage(); + } + argc -= optind; + argv += optind; + + if (!(user = *argv++)) usage(); + if (!(homedir = *argv++)) usage(); + if (!(local = *argv++)) usage(); + if (!(dash = *argv++)) usage(); + if (!(ext = *argv++)) usage(); + if (!(host = *argv++)) usage(); + if (!(sender = *argv++)) usage(); + if (!(aliasempty = *argv++)) usage(); + if (*argv) usage(); + + if (homedir[0] != '/') usage(); + if (chdir(homedir) == -1) + strerr_die5x(111,"Unable to switch to ",homedir,": ",error_str(errno),". (#4.3.0)"); + checkhome(); + + if (!env_put2("HOST",host)) temp_nomem(); + if (!env_put2("HOME",homedir)) temp_nomem(); + if (!env_put2("USER",user)) temp_nomem(); + if (!env_put2("LOCAL",local)) temp_nomem(); + + if (!stralloc_copys(&envrecip,local)) temp_nomem(); + if (!stralloc_cats(&envrecip,"@")) temp_nomem(); + if (!stralloc_cats(&envrecip,host)) temp_nomem(); + + if (!stralloc_copy(&foo,&envrecip)) temp_nomem(); + if (!stralloc_0(&foo)) temp_nomem(); + if (!env_put2("RECIPIENT",foo.s)) temp_nomem(); + + if (!stralloc_copys(&dtline,"Delivered-To: ")) temp_nomem(); + if (!stralloc_cat(&dtline,&envrecip)) temp_nomem(); + for (i = 0;i < dtline.len;++i) if (dtline.s[i] == '\n') dtline.s[i] = '_'; + if (!stralloc_cats(&dtline,"\n")) temp_nomem(); + + if (!stralloc_copy(&foo,&dtline)) temp_nomem(); + if (!stralloc_0(&foo)) temp_nomem(); + if (!env_put2("DTLINE",foo.s)) temp_nomem(); + + if (flagdoit) + bouncexf(); + + if (!env_put2("SENDER",sender)) temp_nomem(); + + if (!quote2(&foo,sender)) temp_nomem(); + if (!stralloc_copys(&rpline,"Return-Path: <")) temp_nomem(); + if (!stralloc_cat(&rpline,&foo)) temp_nomem(); + for (i = 0;i < rpline.len;++i) if (rpline.s[i] == '\n') rpline.s[i] = '_'; + if (!stralloc_cats(&rpline,">\n")) temp_nomem(); + + if (!stralloc_copy(&foo,&rpline)) temp_nomem(); + if (!stralloc_0(&foo)) temp_nomem(); + if (!env_put2("RPLINE",foo.s)) temp_nomem(); + + if (!stralloc_copys(&ufline,"From ")) temp_nomem(); + if (*sender) + { + int len; int i; char ch; + + len = str_len(sender); + if (!stralloc_readyplus(&ufline,len)) temp_nomem(); + for (i = 0;i < len;++i) + { + ch = sender[i]; + if ((ch == ' ') || (ch == '\t') || (ch == '\n')) ch = '-'; + ufline.s[ufline.len + i] = ch; + } + ufline.len += len; + } + else + if (!stralloc_cats(&ufline,"MAILER-DAEMON")) temp_nomem(); + if (!stralloc_cats(&ufline," ")) temp_nomem(); + starttime = now(); + if (!stralloc_cats(&ufline,myctime(starttime))) temp_nomem(); + + if (!stralloc_copy(&foo,&ufline)) temp_nomem(); + if (!stralloc_0(&foo)) temp_nomem(); + if (!env_put2("UFLINE",foo.s)) temp_nomem(); + + x = ext; + if (!env_put2("EXT",x)) temp_nomem(); + x += str_chr(x,'-'); if (*x) ++x; + if (!env_put2("EXT2",x)) temp_nomem(); + x += str_chr(x,'-'); if (*x) ++x; + if (!env_put2("EXT3",x)) temp_nomem(); + x += str_chr(x,'-'); if (*x) ++x; + if (!env_put2("EXT4",x)) temp_nomem(); + + if (!stralloc_copys(&safeext,ext)) temp_nomem(); + case_lowerb(safeext.s,safeext.len); + for (i = 0;i < safeext.len;++i) + if (safeext.s[i] == '.') + safeext.s[i] = ':'; + + i = str_len(host); + i = byte_rchr(host,i,'.'); + if (!stralloc_copyb(&foo,host,i)) temp_nomem(); + if (!stralloc_0(&foo)) temp_nomem(); + if (!env_put2("HOST2",foo.s)) temp_nomem(); + i = byte_rchr(host,i,'.'); + if (!stralloc_copyb(&foo,host,i)) temp_nomem(); + if (!stralloc_0(&foo)) temp_nomem(); + if (!env_put2("HOST3",foo.s)) temp_nomem(); + i = byte_rchr(host,i,'.'); + if (!stralloc_copyb(&foo,host,i)) temp_nomem(); + if (!stralloc_0(&foo)) temp_nomem(); + if (!env_put2("HOST4",foo.s)) temp_nomem(); + + flagforwardonly = 0; + qmesearch(&fd,&flagforwardonly); + if (fd == -1) + if (*dash) + strerr_die1x(100,"Sorry, no mailbox here by that name. (#5.1.1)"); + + if (!stralloc_copys(&ueo,sender)) temp_nomem(); + if (str_diff(sender,"")) + if (str_diff(sender,"#@[]")) + if (qmeox("-owner") == 0) + { + if (qmeox("-owner-default") == 0) + { + if (!stralloc_copys(&ueo,local)) temp_nomem(); + if (!stralloc_cats(&ueo,"-owner-@")) temp_nomem(); + if (!stralloc_cats(&ueo,host)) temp_nomem(); + if (!stralloc_cats(&ueo,"-@[]")) temp_nomem(); + } + else + { + if (!stralloc_copys(&ueo,local)) temp_nomem(); + if (!stralloc_cats(&ueo,"-owner@")) temp_nomem(); + if (!stralloc_cats(&ueo,host)) temp_nomem(); + } + } + if (!stralloc_0(&ueo)) temp_nomem(); + if (!env_put2("NEWSENDER",ueo.s)) temp_nomem(); + + if (!stralloc_ready(&cmds,0)) temp_nomem(); + cmds.len = 0; + if (fd != -1) + if (slurpclose(fd,&cmds,256) == -1) temp_nomem(); + + if (!cmds.len) + { + if (!stralloc_copys(&cmds,aliasempty)) temp_nomem(); + flagforwardonly = 0; + } + if (!cmds.len || (cmds.s[cmds.len - 1] != '\n')) + if (!stralloc_cats(&cmds,"\n")) temp_nomem(); + + numforward = 0; + i = 0; + for (j = 0;j < cmds.len;++j) + if (cmds.s[j] == '\n') + { + switch(cmds.s[i]) { case '#': case '.': case '/': case '|': break; + default: ++numforward; } + i = j + 1; + } + + recips = (char **) alloc((numforward + 1) * sizeof(char *)); + if (!recips) temp_nomem(); + numforward = 0; + + flag99 = 0; + + i = 0; + for (j = 0;j < cmds.len;++j) + if (cmds.s[j] == '\n') + { + cmds.s[j] = 0; + k = j; + while ((k > i) && ((cmds.s[k - 1] == ' ') || (cmds.s[k - 1] == '\t'))) + cmds.s[--k] = 0; + switch(cmds.s[i]) + { + case 0: /* k == i */ + if (i) break; + strerr_die1x(111,"Uh-oh: first line of .qmail file is blank. (#4.2.1)"); + case '#': + break; + case '.': + case '/': + ++count_file; + if (flagforwardonly) strerr_die1x(111,"Uh-oh: .qmail has file delivery but has x bit set. (#4.7.0)"); + if (cmds.s[k - 1] == '/') + if (flagdoit) maildir(cmds.s + i); + else sayit("maildir ",cmds.s + i,k - i); + else + if (flagdoit) mailfile(cmds.s + i); + else sayit("mbox ",cmds.s + i,k - i); + break; + case '|': + ++count_program; + if (flagforwardonly) strerr_die1x(111,"Uh-oh: .qmail has prog delivery but has x bit set. (#4.7.0)"); + if (flagdoit) mailprogram(cmds.s + i + 1); + else sayit("program ",cmds.s + i + 1,k - i - 1); + break; + case '+': + if (str_equal(cmds.s + i + 1,"list")) + flagforwardonly = 1; + break; + case '&': + ++i; + default: + ++count_forward; + if (flagdoit) recips[numforward++] = cmds.s + i; + else sayit("forward ",cmds.s + i,k - i); + break; + } + i = j + 1; + if (flag99) break; + } + + if (numforward) if (flagdoit) + { + recips[numforward] = 0; + mailforward(recips); + } + + count_print(); + _exit(0); +} -- cgit v1.2.3