version 1.15, 2016/11/08 15:57:28 |
version 1.30, 2020/03/21 00:17:31 |
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/* $Id$ */ |
/* $Id$ */ |
/* |
/* |
* Copyright (c) 2015, 2016 Ingo Schwarze <schwarze@openbsd.org> |
* Copyright (c) 2015,2016,2018,2019,2020 Ingo Schwarze <schwarze@openbsd.org> |
* |
* |
* Permission to use, copy, modify, and distribute this software for any |
* Permission to use, copy, modify, and distribute this software for any |
* purpose with or without fee is hereby granted, provided that the above |
* purpose with or without fee is hereby granted, provided that the above |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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* |
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* Functions to tag syntax tree nodes. |
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* For internal use by mandoc(1) validation modules only. |
*/ |
*/ |
#include "config.h" |
#include "config.h" |
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#include <sys/types.h> |
#include <sys/types.h> |
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#include <signal.h> |
#include <assert.h> |
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#include <limits.h> |
#include <stddef.h> |
#include <stddef.h> |
#include <stdint.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
#include <stdlib.h> |
#include <string.h> |
#include <string.h> |
#include <unistd.h> |
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#include "mandoc_aux.h" |
#include "mandoc_aux.h" |
#include "mandoc_ohash.h" |
#include "mandoc_ohash.h" |
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#include "roff.h" |
#include "tag.h" |
#include "tag.h" |
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struct tag_entry { |
struct tag_entry { |
size_t *lines; |
struct roff_node **nodes; |
size_t maxlines; |
size_t maxnodes; |
size_t nlines; |
size_t nnodes; |
int prio; |
int prio; |
char s[]; |
char s[]; |
}; |
}; |
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static void tag_signal(int) __attribute__((noreturn)); |
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static struct ohash tag_data; |
static struct ohash tag_data; |
static struct tag_files tag_files; |
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/* |
/* |
* Prepare for using a pager. |
* Set up the ohash table to collect nodes |
* Not all pagers are capable of using a tag file, |
* where various marked-up terms are documented. |
* but for simplicity, create it anyway. |
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*/ |
*/ |
struct tag_files * |
void |
tag_init(void) |
tag_alloc(void) |
{ |
{ |
struct sigaction sa; |
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int ofd; |
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ofd = -1; |
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tag_files.tfd = -1; |
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tag_files.tcpgid = -1; |
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/* Clean up when dying from a signal. */ |
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memset(&sa, 0, sizeof(sa)); |
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sigfillset(&sa.sa_mask); |
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sa.sa_handler = tag_signal; |
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sigaction(SIGHUP, &sa, NULL); |
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sigaction(SIGINT, &sa, NULL); |
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sigaction(SIGTERM, &sa, NULL); |
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/* |
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* POSIX requires that a process calling tcsetpgrp(3) |
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* from the background gets a SIGTTOU signal. |
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* In that case, do not stop. |
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*/ |
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sa.sa_handler = SIG_IGN; |
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sigaction(SIGTTOU, &sa, NULL); |
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/* Save the original standard output for use by the pager. */ |
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if ((tag_files.ofd = dup(STDOUT_FILENO)) == -1) |
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goto fail; |
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/* Create both temporary output files. */ |
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(void)strlcpy(tag_files.ofn, "/tmp/man.XXXXXXXXXX", |
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sizeof(tag_files.ofn)); |
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(void)strlcpy(tag_files.tfn, "/tmp/man.XXXXXXXXXX", |
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sizeof(tag_files.tfn)); |
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if ((ofd = mkstemp(tag_files.ofn)) == -1) |
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goto fail; |
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if ((tag_files.tfd = mkstemp(tag_files.tfn)) == -1) |
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goto fail; |
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if (dup2(ofd, STDOUT_FILENO) == -1) |
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goto fail; |
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close(ofd); |
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/* |
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* Set up the ohash table to collect output line numbers |
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* where various marked-up terms are documented. |
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*/ |
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mandoc_ohash_init(&tag_data, 4, offsetof(struct tag_entry, s)); |
mandoc_ohash_init(&tag_data, 4, offsetof(struct tag_entry, s)); |
return &tag_files; |
} |
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fail: |
void |
tag_unlink(); |
tag_free(void) |
if (ofd != -1) |
{ |
close(ofd); |
struct tag_entry *entry; |
if (tag_files.ofd != -1) |
unsigned int slot; |
close(tag_files.ofd); |
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if (tag_files.tfd != -1) |
if (tag_data.info.free == NULL) |
close(tag_files.tfd); |
return; |
*tag_files.ofn = '\0'; |
entry = ohash_first(&tag_data, &slot); |
*tag_files.tfn = '\0'; |
while (entry != NULL) { |
tag_files.ofd = -1; |
free(entry->nodes); |
tag_files.tfd = -1; |
free(entry); |
return NULL; |
entry = ohash_next(&tag_data, &slot); |
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} |
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ohash_delete(&tag_data); |
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tag_data.info.free = NULL; |
} |
} |
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/* |
/* |
* Set the line number where a term is defined, |
* Set a node where a term is defined, |
* unless it is already defined at a higher priority. |
* unless it is already defined at a lower priority. |
*/ |
*/ |
void |
void |
tag_put(const char *s, int prio, size_t line) |
tag_put(const char *s, int prio, struct roff_node *n) |
{ |
{ |
struct tag_entry *entry; |
struct tag_entry *entry; |
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const char *se; |
size_t len; |
size_t len; |
unsigned int slot; |
unsigned int slot; |
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/* Sanity checks. */ |
assert(prio <= TAG_FALLBACK); |
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if (tag_files.tfd <= 0) |
if (s == NULL) { |
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if (n->child == NULL || n->child->type != ROFFT_TEXT) |
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return; |
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s = n->child->string; |
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switch (s[0]) { |
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case '-': |
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s++; |
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break; |
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case '\\': |
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switch (s[1]) { |
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case '&': |
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case '-': |
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case 'e': |
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s += 2; |
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break; |
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default: |
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break; |
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} |
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break; |
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default: |
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break; |
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} |
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} |
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/* |
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* Skip whitespace and escapes and whatever follows, |
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* and if there is any, downgrade the priority. |
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*/ |
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len = strcspn(s, " \t\\"); |
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if (len == 0) |
return; |
return; |
if (s[0] == '\\' && (s[1] == '&' || s[1] == 'e')) |
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s += 2; |
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if (*s == '\0' || strchr(s, ' ') != NULL) |
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return; |
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slot = ohash_qlookup(&tag_data, s); |
se = s + len; |
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if (*se != '\0' && prio < TAG_WEAK) |
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prio = TAG_WEAK; |
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slot = ohash_qlookupi(&tag_data, s, &se); |
entry = ohash_find(&tag_data, slot); |
entry = ohash_find(&tag_data, slot); |
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if (entry == NULL) { |
/* Build a new entry. */ |
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/* Build a new entry. */ |
if (entry == NULL) { |
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entry = mandoc_malloc(sizeof(*entry) + len + 1); |
len = strlen(s) + 1; |
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entry = mandoc_malloc(sizeof(*entry) + len); |
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memcpy(entry->s, s, len); |
memcpy(entry->s, s, len); |
entry->lines = NULL; |
entry->s[len] = '\0'; |
entry->maxlines = entry->nlines = 0; |
entry->nodes = NULL; |
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entry->maxnodes = entry->nnodes = 0; |
ohash_insert(&tag_data, slot, entry); |
ohash_insert(&tag_data, slot, entry); |
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} |
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} else { |
/* |
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* Lower priority numbers take precedence. |
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* If a better entry is already present, ignore the new one. |
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*/ |
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/* A better entry is already present, ignore the new one. */ |
else if (entry->prio < prio) |
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if (entry->prio < prio) |
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return; |
return; |
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/* The existing entry is worse, clear it. */ |
/* |
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* If the existing entry is worse, clear it. |
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* In addition, a tag with priority TAG_FALLBACK |
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* is only used if the tag occurs exactly once. |
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*/ |
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if (entry->prio > prio) |
else if (entry->prio > prio || prio == TAG_FALLBACK) { |
entry->nlines = 0; |
while (entry->nnodes > 0) |
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entry->nodes[--entry->nnodes]->flags &= ~NODE_ID; |
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if (prio == TAG_FALLBACK) { |
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entry->prio = TAG_DELETE; |
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return; |
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} |
} |
} |
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/* Remember the new line. */ |
/* Remember the new node. */ |
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if (entry->maxlines == entry->nlines) { |
if (entry->maxnodes == entry->nnodes) { |
entry->maxlines += 4; |
entry->maxnodes += 4; |
entry->lines = mandoc_reallocarray(entry->lines, |
entry->nodes = mandoc_reallocarray(entry->nodes, |
entry->maxlines, sizeof(*entry->lines)); |
entry->maxnodes, sizeof(*entry->nodes)); |
} |
} |
entry->lines[entry->nlines++] = line; |
entry->nodes[entry->nnodes++] = n; |
entry->prio = prio; |
entry->prio = prio; |
} |
n->flags |= NODE_ID; |
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if (n->child == NULL || n->child->string != s || *se != '\0') { |
/* |
assert(n->string == NULL); |
* Write out the tags file using the previously collected |
n->string = mandoc_strndup(s, len); |
* information and clear the ohash table while going along. |
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*/ |
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void |
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tag_write(void) |
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{ |
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FILE *stream; |
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struct tag_entry *entry; |
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size_t i; |
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unsigned int slot; |
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if (tag_files.tfd <= 0) |
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return; |
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stream = fdopen(tag_files.tfd, "w"); |
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entry = ohash_first(&tag_data, &slot); |
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while (entry != NULL) { |
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if (stream != NULL) |
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for (i = 0; i < entry->nlines; i++) |
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fprintf(stream, "%s %s %zu\n", |
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entry->s, tag_files.ofn, entry->lines[i]); |
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free(entry->lines); |
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free(entry); |
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entry = ohash_next(&tag_data, &slot); |
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} |
} |
ohash_delete(&tag_data); |
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if (stream != NULL) |
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fclose(stream); |
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} |
} |
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void |
enum tag_result |
tag_unlink(void) |
tag_check(const char *test_tag) |
{ |
{ |
pid_t tc_pgid; |
unsigned int slot; |
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if (tag_files.tcpgid != -1) { |
if (ohash_first(&tag_data, &slot) == NULL) |
tc_pgid = tcgetpgrp(STDIN_FILENO); |
return TAG_EMPTY; |
if (tc_pgid == tag_files.pager_pid || |
else if (test_tag != NULL && ohash_find(&tag_data, |
tc_pgid == getpgid(0) || |
ohash_qlookup(&tag_data, test_tag)) == NULL) |
getpgid(tc_pgid) == -1) |
return TAG_MISS; |
(void)tcsetpgrp(STDIN_FILENO, tag_files.tcpgid); |
else |
} |
return TAG_OK; |
if (*tag_files.ofn != '\0') |
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unlink(tag_files.ofn); |
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if (*tag_files.tfn != '\0') |
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unlink(tag_files.tfn); |
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} |
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static void |
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tag_signal(int signum) |
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{ |
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struct sigaction sa; |
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tag_unlink(); |
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memset(&sa, 0, sizeof(sa)); |
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sigemptyset(&sa.sa_mask); |
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sa.sa_handler = SIG_DFL; |
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sigaction(signum, &sa, NULL); |
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kill(getpid(), signum); |
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/* NOTREACHED */ |
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_exit(1); |
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} |
} |