* mdocml: More tweaking of set_basedir().
@ 2014-06-20 1:21 schwarze
0 siblings, 0 replies; only message in thread
From: schwarze @ 2014-06-20 1:21 UTC (permalink / raw)
To: source
Log Message:
-----------
More tweaking of set_basedir().
1) Do not error out when getcwd(3) fails, only fail when inaccessibility
of the cwd prevents processing of relative paths given on the command line.
2) Do not uselessly call set_basedir() twice in a row.
While fts_read(3) in treescan() does cause the cwd to jump around,
fts_close(3) is always called at the end, putting us back
where we came from. The -d/-u fallback code already relied on this.
3) Fix the man-root-dir indicator in say().
Modified Files:
--------------
mdocml:
mandocdb.c
Revision Data
-------------
Index: mandocdb.c
===================================================================
RCS file: /usr/vhosts/mdocml.bsd.lv/cvs/mdocml/mandocdb.c,v
retrieving revision 1.150
retrieving revision 1.151
diff -Lmandocdb.c -Lmandocdb.c -u -p -r1.150 -r1.151
--- mandocdb.c
+++ mandocdb.c
@@ -506,8 +506,6 @@ main(int argc, char *argv[])
goto out;
if (0 == treescan())
goto out;
- if (0 == set_basedir(dirs.paths[j]))
- goto out;
if (0 == dbopen(0))
goto out;
@@ -2374,39 +2372,56 @@ static int
set_basedir(const char *targetdir)
{
static char startdir[PATH_MAX];
- static int fd;
+ static int getcwd_status; /* 1 = ok, 2 = failure */
+ static int chdir_status; /* 1 = changed directory */
char *cp;
/*
- * Remember where we started by keeping a fd open to the origin
- * path component: throughout this utility, we chdir() a lot to
- * handle relative paths, and by doing this, we can return to
- * the starting point.
+ * Remember the original working directory, if possible.
+ * This will be needed if the second or a later directory
+ * on the command line is given as a relative path.
+ * Do not error out if the current directory is not
+ * searchable: Maybe it won't be needed after all.
*/
- if ('\0' == *startdir) {
- if (NULL == getcwd(startdir, PATH_MAX)) {
- exitcode = (int)MANDOCLEVEL_SYSERR;
- say("", "&getcwd");
- return(0);
- }
- if (-1 == (fd = open(startdir, O_RDONLY, 0))) {
+ if (0 == getcwd_status) {
+ if (NULL == getcwd(startdir, sizeof(startdir))) {
+ getcwd_status = 2;
+ (void)strlcpy(startdir, strerror(errno),
+ sizeof(startdir));
+ } else
+ getcwd_status = 1;
+ }
+
+ /*
+ * We are leaving the old base directory.
+ * Do not use it any longer, not even for messages.
+ */
+ *basedir = '\0';
+
+ /*
+ * If and only if the directory was changed earlier and
+ * the next directory to process is given as a relative path,
+ * first go back, or bail out if that is impossible.
+ */
+ if (chdir_status && '/' != *targetdir) {
+ if (2 == getcwd_status) {
exitcode = (int)MANDOCLEVEL_SYSERR;
- say("", "&open %s", startdir);
+ say("", "getcwd: %s", startdir);
return(0);
}
- } else {
- if (-1 == fd)
- return(0);
- if (-1 == fchdir(fd)) {
- close(fd);
- basedir[0] = '\0';
+ if (-1 == chdir(startdir)) {
exitcode = (int)MANDOCLEVEL_SYSERR;
say("", "&chdir %s", startdir);
return(0);
}
}
+
+ /*
+ * Always resolve basedir to the canonicalized absolute
+ * pathname and append a trailing slash, such that
+ * we can reliably check whether files are inside.
+ */
if (NULL == realpath(targetdir, basedir)) {
- basedir[0] = '\0';
exitcode = (int)MANDOCLEVEL_BADARG;
say("", "&%s: realpath", targetdir);
return(0);
@@ -2415,6 +2430,7 @@ set_basedir(const char *targetdir)
say("", "&chdir");
return(0);
}
+ chdir_status = 1;
cp = strchr(basedir, '\0');
if ('/' != cp[-1]) {
if (cp - basedir >= PATH_MAX - 1) {
@@ -2437,7 +2453,7 @@ say(const char *file, const char *format
if ('\0' != *basedir)
fprintf(stderr, "%s", basedir);
if ('\0' != *basedir && '\0' != *file)
- fputs("//", stderr);
+ fputc('/', stderr);
if ('\0' != *file)
fprintf(stderr, "%s", file);
--
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