Mercurial > hg > octave-jordi > gnulib-hg
changeset 979:302fd7682df7
(make_path): Chdir to `/' before starting if necessary.
Call save_cwd before while loop rather than from first iteration inside it.
| author | Jim Meyering <jim@meyering.net> |
|---|---|
| date | Wed, 09 Jul 1997 18:02:07 +0000 |
| parents | 6fa2e0c30481 |
| children | a563e4042d34 |
| files | lib/makepath.c |
| diffstat | 1 files changed, 17 insertions(+), 15 deletions(-) [+] |
line wrap: on
line diff
--- a/lib/makepath.c +++ b/lib/makepath.c @@ -87,7 +87,7 @@ { \ /* We're done operating on basename_dir. \ Restore working directory. */ \ - if (saved_cwd) \ + if (do_chdir) \ { \ int fail = restore_cwd (&cwd, NULL, NULL); \ free_cwd (&cwd); \ @@ -159,10 +159,9 @@ struct ptr_list *next; }; struct ptr_list *p, *leading_dirs = NULL; - int saved_cwd = 0; + int do_chdir; /* Whether to chdir before each mkdir. */ struct saved_cwd cwd; char *basename_dir; - int first_subdir = 1; char *dirpath; /* Temporarily relax umask in case it's overly restrictive. */ @@ -189,6 +188,16 @@ re_protect = 0; } + /* If we can record the current working directory, we may be able + to do the chdir optimization. */ + do_chdir = !save_cwd (&cwd); + + /* If we've saved the cwd and DIRPATH is an absolute pathname, + we must chdir to `/' in order to enable the chdir optimization. + So if chdir ("/") fails, turn off the optimization. */ + if (do_chdir && *dirpath == '/' && chdir ("/") < 0) + do_chdir = 0; + slash = dirpath; /* Skip over leading slashes. */ @@ -204,16 +213,9 @@ if (slash == NULL) break; - if (first_subdir) - { - first_subdir = 0; - saved_cwd = !save_cwd (&cwd); - } - - /* If save_cwd could not record the current directory, then don't - do the chdir optimization and resort to using full pathnames. */ - - if (!saved_cwd) + /* If we're *not* doing chdir before each mkdir, then we have to refer + to the target using the full (multi-component) directory name. */ + if (!do_chdir) basename_dir = dirpath; *slash = '\0'; @@ -265,7 +267,7 @@ then we can use chdir to change into each directory before creating an entry in that directory. This avoids making stat and mkdir process O(n^2) file name components. */ - if (saved_cwd && chdir (basename_dir) < 0) + if (do_chdir && chdir (basename_dir) < 0) { error (0, errno, "cannot chdir to directory, %s", dirpath); CLEANUP; @@ -280,7 +282,7 @@ slash++; } - if (!saved_cwd) + if (!do_chdir) basename_dir = dirpath; /* We're done making leading directories.