X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/3634fc257bd0667daef14d72005cd87c735bbb24..436bda2ac0c4a245815db3fc1ef2aedee05eab8d:/src/src/rda.c?ds=sidebyside diff --git a/src/src/rda.c b/src/src/rda.c index 877434098..228f57409 100644 --- a/src/src/rda.c +++ b/src/src/rda.c @@ -2,7 +2,7 @@ * Exim - an Internet mail transport agent * *************************************************/ -/* Copyright (c) University of Cambridge 1995 - 2009 */ +/* Copyright (c) University of Cambridge 1995 - 2018 */ /* See the file NOTICE for conditions of use and distribution. */ /* This module contains code for extracting addresses from a forwarding list @@ -42,14 +42,14 @@ static BOOL match_tag(const uschar *s, const uschar *tag) { for (; *tag != 0; s++, tag++) - { if (*tag == ' ') { while (*s == ' ' || *s == '\t') s++; s--; } - else if (tolower(*s) != tolower(*tag)) break; - } + else + if (tolower(*s) != tolower(*tag)) break; + return (*tag == 0); } @@ -110,7 +110,7 @@ if (saved_errno == ENOENT) slash = Ustrrchr(big_buffer, '/'); Ustrcpy(slash+1, "."); - alarm(30); + ALARM(30); rc = Ustat(big_buffer, &statbuf); if (rc != 0 && errno == EACCES && !sigalrm_seen) { @@ -118,7 +118,7 @@ if (saved_errno == ENOENT) rc = Ustat(big_buffer, &statbuf); } saved_errno = errno; - alarm(0); + ALARM_CLR(0); DEBUG(D_route) debug_printf("stat(%s)=%d\n", big_buffer, rc); } @@ -250,11 +250,8 @@ if (!uid_ok) if (rdata->pw != NULL && statbuf.st_uid == rdata->pw->pw_uid) uid_ok = TRUE; else if (rdata->owners != NULL) - { - int i; - for (i = 1; i <= (int)(rdata->owners[0]); i++) + for (int i = 1; i <= (int)(rdata->owners[0]); i++) if (rdata->owners[i] == statbuf.st_uid) { uid_ok = TRUE; break; } - } } if (!gid_ok) @@ -262,11 +259,8 @@ if (!gid_ok) if (rdata->pw != NULL && statbuf.st_gid == rdata->pw->pw_gid) gid_ok = TRUE; else if (rdata->owngroups != NULL) - { - int i; - for (i = 1; i <= (int)(rdata->owngroups[0]); i++) + for (int i = 1; i <= (int)(rdata->owngroups[0]); i++) if (rdata->owngroups[i] == statbuf.st_gid) { gid_ok = TRUE; break; } - } } if (!uid_ok || !gid_ok) @@ -358,7 +352,7 @@ if (rdata->isfile) } else data = rdata->string; -*filtertype = system_filtering? FILTER_EXIM : rda_is_filter(data); +*filtertype = f.system_filtering ? FILTER_EXIM : rda_is_filter(data); /* Filter interpretation is done by a general function that is also called from the filter testing option (-bf). There are two versions: one for Exim filtering @@ -433,22 +427,24 @@ return parse_forward_list(data, * Write string down pipe * *************************************************/ -/* This function is used for tranferring a string down a pipe between +/* This function is used for transferring a string down a pipe between processes. If the pointer is NULL, a length of zero is written. Arguments: fd the pipe s the string -Returns: nothing +Returns: -1 on error, else 0 */ -static void -rda_write_string(int fd, uschar *s) +static int +rda_write_string(int fd, const uschar *s) { int len = (s == NULL)? 0 : Ustrlen(s) + 1; -(void)write(fd, &len, sizeof(int)); -if (s != NULL) (void)write(fd, s, len); +return ( write(fd, &len, sizeof(int)) != sizeof(int) + || (s != NULL && write(fd, s, len) != len) + ) + ? -1 : 0; } @@ -472,11 +468,12 @@ rda_read_string(int fd, uschar **sp) int len; if (read(fd, &len, sizeof(int)) != sizeof(int)) return FALSE; -if (len == 0) *sp = NULL; else - { - *sp = store_get(len); - if (read(fd, *sp, len) != len) return FALSE; - } +if (len == 0) + *sp = NULL; +else + /* We know we have enough memory so disable the error on "len" */ + /* coverity[tainted_data] */ + if (read(fd, *sp = store_get(len), len) != len) return FALSE; return TRUE; } @@ -489,7 +486,7 @@ return TRUE; /* This function is passed a forward list string (unexpanded) or the name of a file (unexpanded) whose contents are the forwarding list. The list may in fact be a filter program if it starts with "#Exim filter" or "#Sieve filter". Other -types of filter, with different inital tag strings, may be introduced in due +types of filter, with different initial tag strings, may be introduced in due course. The job of the function is to process the forwarding list or filter. It is @@ -563,7 +560,7 @@ DEBUG(D_route) debug_printf("rda_interpret (%s): %s\n", data = expand_string(rdata->string); if (data == NULL) { - if (expand_string_forcedfail) return FF_NOTDELIVERED; + if (f.expand_string_forcedfail) return FF_NOTDELIVERED; *error = string_sprintf("failed to expand \"%s\": %s", rdata->string, expand_string_message); return FF_ERROR; @@ -633,7 +630,7 @@ if ((pid = fork()) == 0) { DEBUG(D_rewrite) debug_printf("turned off address rewrite logging (not " "root or exim in this process)\n"); - log_write_selector &= ~L_address_rewrite; + BIT_CLEAR(log_selector, log_selector_size, Li_address_rewrite); } /* Now do the business */ @@ -645,53 +642,60 @@ if ((pid = fork()) == 0) /* Pass back whether it was a filter, and the return code and any overall error text via the pipe. */ - (void)write(fd, filtertype, sizeof(int)); - (void)write(fd, &yield, sizeof(int)); - rda_write_string(fd, *error); + if ( write(fd, filtertype, sizeof(int)) != sizeof(int) + || write(fd, &yield, sizeof(int)) != sizeof(int) + || rda_write_string(fd, *error) != 0 + ) + goto bad; /* Pass back the contents of any syntax error blocks if we have a pointer */ - if (eblockp != NULL) + if (eblockp) { - error_block *ep; - for (ep = *eblockp; ep != NULL; ep = ep->next) - { - rda_write_string(fd, ep->text1); - rda_write_string(fd, ep->text2); - } - rda_write_string(fd, NULL); /* Indicates end of eblocks */ + for (error_block * ep = *eblockp; ep; ep = ep->next) + if ( rda_write_string(fd, ep->text1) != 0 + || rda_write_string(fd, ep->text2) != 0 + ) + goto bad; + if (rda_write_string(fd, NULL) != 0) /* Indicates end of eblocks */ + goto bad; } /* If this is a system filter, we have to pass back the numbers of any original header lines that were removed, and then any header lines that were added but not subsequently removed. */ - if (system_filtering) + if (f.system_filtering) { int i = 0; - header_line *h; - for (h = header_list; h != waslast->next; i++, h = h->next) - { - if (h->type == htype_old) (void)write(fd, &i, sizeof(i)); - } + for (header_line * h = header_list; h != waslast->next; i++, h = h->next) + if ( h->type == htype_old + && write(fd, &i, sizeof(i)) != sizeof(i) + ) + goto bad; + i = -1; - (void)write(fd, &i, sizeof(i)); + if (write(fd, &i, sizeof(i)) != sizeof(i)) + goto bad; while (waslast != header_last) { waslast = waslast->next; if (waslast->type != htype_old) - { - rda_write_string(fd, waslast->text); - (void)write(fd, &(waslast->type), sizeof(waslast->type)); - } + if ( rda_write_string(fd, waslast->text) != 0 + || write(fd, &(waslast->type), sizeof(waslast->type)) + != sizeof(waslast->type) + ) + goto bad; } - rda_write_string(fd, NULL); /* Indicates end of added headers */ + if (rda_write_string(fd, NULL) != 0) /* Indicates end of added headers */ + goto bad; } /* Write the contents of the $n variables */ - (void)write(fd, filter_n, sizeof(filter_n)); + if (write(fd, filter_n, sizeof(filter_n)) != sizeof(filter_n)) + goto bad; /* If the result was DELIVERED or NOTDELIVERED, we pass back the generated addresses, and their associated information, through the pipe. This is @@ -702,57 +706,72 @@ if ((pid = fork()) == 0) if (yield == FF_DELIVERED || yield == FF_NOTDELIVERED || yield == FF_FAIL || yield == FF_FREEZE) { - address_item *addr; - for (addr = *generated; addr != NULL; addr = addr->next) + for (address_item * addr = *generated; addr; addr = addr->next) { int reply_options = 0; - - rda_write_string(fd, addr->address); - (void)write(fd, &(addr->mode), sizeof(addr->mode)); - (void)write(fd, &(addr->flags), sizeof(addr->flags)); - rda_write_string(fd, addr->p.errors_address); - - if (addr->pipe_expandn != NULL) - { - uschar **pp; - for (pp = addr->pipe_expandn; *pp != NULL; pp++) - rda_write_string(fd, *pp); - } - rda_write_string(fd, NULL); - - if (addr->reply == NULL) - (void)write(fd, &reply_options, sizeof(int)); /* 0 means no reply */ + int ig_err = addr->prop.ignore_error ? 1 : 0; + + if ( rda_write_string(fd, addr->address) != 0 + || write(fd, &addr->mode, sizeof(addr->mode)) != sizeof(addr->mode) + || write(fd, &addr->flags, sizeof(addr->flags)) != sizeof(addr->flags) + || rda_write_string(fd, addr->prop.errors_address) != 0 + || write(fd, &ig_err, sizeof(ig_err)) != sizeof(ig_err) + ) + goto bad; + + if (addr->pipe_expandn) + for (uschar ** pp = addr->pipe_expandn; *pp; pp++) + if (rda_write_string(fd, *pp) != 0) + goto bad; + if (rda_write_string(fd, NULL) != 0) + goto bad; + + if (!addr->reply) + { + if (write(fd, &reply_options, sizeof(int)) != sizeof(int)) /* 0 means no reply */ + goto bad; + } else { reply_options |= REPLY_EXISTS; if (addr->reply->file_expand) reply_options |= REPLY_EXPAND; if (addr->reply->return_message) reply_options |= REPLY_RETURN; - (void)write(fd, &reply_options, sizeof(int)); - (void)write(fd, &(addr->reply->expand_forbid), sizeof(int)); - (void)write(fd, &(addr->reply->once_repeat), sizeof(time_t)); - rda_write_string(fd, addr->reply->to); - rda_write_string(fd, addr->reply->cc); - rda_write_string(fd, addr->reply->bcc); - rda_write_string(fd, addr->reply->from); - rda_write_string(fd, addr->reply->reply_to); - rda_write_string(fd, addr->reply->subject); - rda_write_string(fd, addr->reply->headers); - rda_write_string(fd, addr->reply->text); - rda_write_string(fd, addr->reply->file); - rda_write_string(fd, addr->reply->logfile); - rda_write_string(fd, addr->reply->oncelog); + if ( write(fd, &reply_options, sizeof(int)) != sizeof(int) + || write(fd, &(addr->reply->expand_forbid), sizeof(int)) + != sizeof(int) + || write(fd, &(addr->reply->once_repeat), sizeof(time_t)) + != sizeof(time_t) + || rda_write_string(fd, addr->reply->to) != 0 + || rda_write_string(fd, addr->reply->cc) != 0 + || rda_write_string(fd, addr->reply->bcc) != 0 + || rda_write_string(fd, addr->reply->from) != 0 + || rda_write_string(fd, addr->reply->reply_to) != 0 + || rda_write_string(fd, addr->reply->subject) != 0 + || rda_write_string(fd, addr->reply->headers) != 0 + || rda_write_string(fd, addr->reply->text) != 0 + || rda_write_string(fd, addr->reply->file) != 0 + || rda_write_string(fd, addr->reply->logfile) != 0 + || rda_write_string(fd, addr->reply->oncelog) != 0 + ) + goto bad; } } - rda_write_string(fd, NULL); /* Marks end of addresses */ + if (rda_write_string(fd, NULL) != 0) /* Marks end of addresses */ + goto bad; } /* OK, this process is now done. Free any cached resources. Must use _exit() and not exit() !! */ +out: (void)close(fd); search_tidyup(); _exit(0); + +bad: + DEBUG(D_rewrite) debug_printf("rda_interpret: failed write to pipe\n"); + goto out; } /* Back in the main process: panic if the fork did not succeed. */ @@ -775,29 +794,27 @@ if (read(fd, filtertype, sizeof(int)) != sizeof(int) || /* Read the contents of any syntax error blocks if we have a pointer */ -if (eblockp != NULL) +if (eblockp) { - uschar *s; error_block *e; - error_block **p = eblockp; - for (;;) + for (error_block ** p = eblockp; ; p = &e->next) { + uschar *s; if (!rda_read_string(fd, &s)) goto DISASTER; - if (s == NULL) break; + if (!s) break; e = store_get(sizeof(error_block)); e->next = NULL; e->text1 = s; if (!rda_read_string(fd, &s)) goto DISASTER; e->text2 = s; *p = e; - p = &(e->next); } } /* If this is a system filter, read the identify of any original header lines that were removed, and then read data for any new ones that were added. */ -if (system_filtering) +if (f.system_filtering) { int hn = 0; header_line *h = header_list; @@ -810,8 +827,7 @@ if (system_filtering) while (hn < n) { hn++; - h = h->next; - if (h == NULL) goto DISASTER_NO_HEADER; + if (!(h = h->next)) goto DISASTER_NO_HEADER; } h->type = htype_old; } @@ -821,7 +837,7 @@ if (system_filtering) uschar *s; int type; if (!rda_read_string(fd, &s)) goto DISASTER; - if (s == NULL) break; + if (!s) break; if (read(fd, &type, sizeof(type)) != sizeof(type)) goto DISASTER; header_add(type, "%s", s); } @@ -860,9 +876,13 @@ if (yield == FF_DELIVERED || yield == FF_NOTDELIVERED || /* Next comes the mode and the flags fields */ - if (read(fd, &(addr->mode), sizeof(addr->mode)) != sizeof(addr->mode) || - read(fd, &(addr->flags), sizeof(addr->flags)) != sizeof(addr->flags) || - !rda_read_string(fd, &(addr->p.errors_address))) goto DISASTER; + if ( read(fd, &addr->mode, sizeof(addr->mode)) != sizeof(addr->mode) + || read(fd, &addr->flags, sizeof(addr->flags)) != sizeof(addr->flags) + || !rda_read_string(fd, &addr->prop.errors_address) + || read(fd, &i, sizeof(i)) != sizeof(i) + ) + goto DISASTER; + addr->prop.ignore_error = (i != 0); /* Next comes a possible setting for $thisaddress and any numerical variables for pipe expansion, terminated by a NULL string. The maximum @@ -881,7 +901,7 @@ if (yield == FF_DELIVERED || yield == FF_NOTDELIVERED || if (i > 0) { - addr->pipe_expandn = store_get((i+1) * sizeof(uschar **)); + addr->pipe_expandn = store_get((i+1) * sizeof(uschar *)); addr->pipe_expandn[i] = NULL; while (--i >= 0) addr->pipe_expandn[i] = expandn[i]; }