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-rw-r--r--main.c93
1 files changed, 32 insertions, 61 deletions
diff --git a/main.c b/main.c
index 22707176..20078ba1 100644
--- a/main.c
+++ b/main.c
@@ -95,7 +95,6 @@ static int fs_lookup(const struct manpaths *,
static void fs_search(const struct mansearch *,
const struct manpaths *, int, char**,
struct manpage **, size_t *);
-static void handle_sigpipe(int);
static int koptions(int *, char *);
#if HAVE_SQLITE3
int mandocdb(int, char**);
@@ -105,7 +104,7 @@ static void mmsg(enum mandocerr, enum mandoclevel,
const char *, int, int, const char *);
static void parse(struct curparse *, int, const char *);
static void passthrough(const char *, int, int);
-static pid_t spawn_pager(void);
+static pid_t spawn_pager(struct tag_files *);
static int toptions(struct curparse *, char *);
static void usage(enum argmode) __attribute__((noreturn));
static int woptions(struct curparse *, char *);
@@ -123,6 +122,7 @@ main(int argc, char *argv[])
struct manconf conf;
struct curparse curp;
struct mansearch search;
+ struct tag_files *tag_files;
char *auxpaths;
char *defos;
unsigned char *uc;
@@ -136,8 +136,8 @@ main(int argc, char *argv[])
int fd;
int show_usage;
int options;
+ int use_pager;
int c;
- pid_t pager_pid; /* 0: don't use; 1: not yet spawned. */
if (argc < 1)
progname = "mandoc";
@@ -180,7 +180,8 @@ main(int argc, char *argv[])
options = MPARSE_SO | MPARSE_UTF8 | MPARSE_LATIN1;
defos = NULL;
- pager_pid = 1;
+ use_pager = 1;
+ tag_files = NULL;
show_usage = 0;
outmode = OUTMODE_DEF;
@@ -194,14 +195,14 @@ main(int argc, char *argv[])
conf_file = optarg;
break;
case 'c':
- pager_pid = 0;
+ use_pager = 0;
break;
case 'f':
search.argmode = ARG_WORD;
break;
case 'h':
conf.output.synopsisonly = 1;
- pager_pid = 0;
+ use_pager = 0;
outmode = OUTMODE_ALL;
break;
case 'I':
@@ -277,7 +278,7 @@ main(int argc, char *argv[])
switch (search.argmode) {
case ARG_FILE:
outmode = OUTMODE_ALL;
- pager_pid = 0;
+ use_pager = 0;
break;
case ARG_NAME:
outmode = OUTMODE_ONE;
@@ -419,8 +420,8 @@ main(int argc, char *argv[])
if (search.argmode == ARG_FILE && ! moptions(&options, auxpaths))
return((int)MANDOCLEVEL_BADARG);
- if (pager_pid == 1 && isatty(STDOUT_FILENO) == 0)
- pager_pid = 0;
+ if (use_pager && ! isatty(STDOUT_FILENO))
+ use_pager = 0;
curp.mchars = mchars_alloc();
curp.mp = mparse_alloc(options, curp.wlevel, mmsg,
@@ -433,8 +434,8 @@ main(int argc, char *argv[])
mparse_keep(curp.mp);
if (argc < 1) {
- if (pager_pid == 1)
- pager_pid = spawn_pager();
+ if (use_pager)
+ tag_files = tag_init();
parse(&curp, STDIN_FILENO, "<stdin>");
}
@@ -445,8 +446,10 @@ main(int argc, char *argv[])
rc = rctmp;
if (fd != -1) {
- if (pager_pid == 1)
- pager_pid = spawn_pager();
+ if (use_pager) {
+ tag_files = tag_init();
+ use_pager = 0;
+ }
if (resp == NULL)
parse(&curp, fd, *argv);
@@ -490,15 +493,14 @@ out:
free(defos);
/*
- * If a pager is attached, flush the pipe leading to it
- * and signal end of file such that the user can browse
- * to the end. Then wait for the user to close the pager.
+ * When using a pager, finish writing both temporary files,
+ * fork it, wait for the user to close it, and clean up.
*/
- if (pager_pid != 0 && pager_pid != 1) {
+ if (tag_files != NULL) {
fclose(stdout);
tag_write();
- waitpid(pager_pid, NULL, 0);
+ waitpid(spawn_pager(tag_files), NULL, 0);
tag_unlink();
}
@@ -947,22 +949,14 @@ mmsg(enum mandocerr t, enum mandoclevel lvl,
fputc('\n', stderr);
}
-static void
-handle_sigpipe(int signum)
-{
-
- exit((int)rc);
-}
-
static pid_t
-spawn_pager(void)
+spawn_pager(struct tag_files *tag_files)
{
#define MAX_PAGER_ARGS 16
char *argv[MAX_PAGER_ARGS];
const char *pager;
char *cp;
size_t cmdlen;
- int fildes[2];
int argc;
pid_t pager_pid;
@@ -991,29 +985,18 @@ spawn_pager(void)
break;
}
- /* Read all text right away and use the tag file. */
+ /* For more(1) and less(1), use the tag file. */
- for (;;) {
- if ((cmdlen = strlen(argv[0])) < 4)
- break;
+ if ((cmdlen = strlen(argv[0])) >= 4) {
cp = argv[0] + cmdlen - 4;
- if (strcmp(cp, "less") && strcmp(cp, "more"))
- break;
- if ((cp = tag_init()) == NULL)
- break;
- argv[argc++] = mandoc_strdup("+G1G");
- argv[argc++] = mandoc_strdup("-T");
- argv[argc++] = cp;
- break;
+ if (strcmp(cp, "less") == 0 || strcmp(cp, "more") == 0) {
+ argv[argc++] = mandoc_strdup("-T");
+ argv[argc++] = tag_files->tfn;
+ }
}
+ argv[argc++] = tag_files->ofn;
argv[argc] = NULL;
- if (pipe(fildes) == -1) {
- fprintf(stderr, "%s: pipe: %s\n",
- progname, strerror(errno));
- return(0);
- }
-
switch (pager_pid = fork()) {
case -1:
fprintf(stderr, "%s: fork: %s\n",
@@ -1022,29 +1005,17 @@ spawn_pager(void)
case 0:
break;
default:
- close(fildes[0]);
- if (dup2(fildes[1], STDOUT_FILENO) == -1) {
- fprintf(stderr, "%s: dup output: %s\n",
- progname, strerror(errno));
- exit((int)MANDOCLEVEL_SYSERR);
- }
- close(fildes[1]);
- signal(SIGPIPE, handle_sigpipe);
return(pager_pid);
}
/* The child process becomes the pager. */
- close(fildes[1]);
- if (dup2(fildes[0], STDIN_FILENO) == -1) {
- fprintf(stderr, "%s: dup input: %s\n",
- progname, strerror(errno));
+ if (dup2(tag_files->ofd, STDOUT_FILENO) == -1) {
+ fprintf(stderr, "pager: stdout: %s\n", strerror(errno));
exit((int)MANDOCLEVEL_SYSERR);
}
- close(fildes[0]);
-
- /* Hand over to the pager. */
-
+ close(tag_files->ofd);
+ close(tag_files->tfd);
execvp(argv[0], argv);
fprintf(stderr, "%s: exec %s: %s\n",
progname, argv[0], strerror(errno));