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author | obrien <obrien@FreeBSD.org> | 2010-01-04 18:57:22 +0000 |
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committer | obrien <obrien@FreeBSD.org> | 2010-01-04 18:57:22 +0000 |
commit | d2744b88e92689da349b5de750666f235ea9a4ce (patch) | |
tree | a3e67a307d511e8bb94e2cef9388c3b1c989d519 /usr.bin/make/dir.c | |
parent | f86eec131ecd8165dffb9b3c544d58e63f18a772 (diff) | |
download | FreeBSD-src-d2744b88e92689da349b5de750666f235ea9a4ce.zip FreeBSD-src-d2744b88e92689da349b5de750666f235ea9a4ce.tar.gz |
Add ability to search up the directory hierarchy for the system directory.
Do by specifying ".../" with '-m' or MAKESYSPATH (new) environment variable.
Reviewed by: <sjg@NetBSD.org>
Obtained from: NetBSD (+ embellishment by me, sent back to NetBSD)
Diffstat (limited to 'usr.bin/make/dir.c')
-rw-r--r-- | usr.bin/make/dir.c | 83 |
1 files changed, 82 insertions, 1 deletions
diff --git a/usr.bin/make/dir.c b/usr.bin/make/dir.c index 9b529ea..7cee3d4 100644 --- a/usr.bin/make/dir.c +++ b/usr.bin/make/dir.c @@ -61,6 +61,10 @@ __FBSDID("$FreeBSD$"); * If it exists, the entire path is returned. * Otherwise NULL is returned. * + * Dir_FindHereOrAbove Search for a path in the current directory and + * then all the directories above it in turn until + * the path is found or we reach the root ("/"). + * * Dir_MTime Return the modification time of a node. The file * is searched for along the default search path. * The path and mtime fields of the node are filled in. @@ -83,7 +87,7 @@ __FBSDID("$FreeBSD$"); * Dir_PrintDirectories Print stats about the directory cache. */ -#include <sys/types.h> +#include <sys/param.h> #include <sys/stat.h> #include <dirent.h> #include <err.h> @@ -851,6 +855,83 @@ Path_FindFile(char *name, struct Path *path) /*- *----------------------------------------------------------------------- + * Dir_FindHereOrAbove -- + * search for a path starting at a given directory and then working + * our way up towards the root. + * + * Input: + * here starting directory + * search_path the path we are looking for + * result the result of a successful search is placed here + * rlen the length of the result buffer + * (typically MAXPATHLEN + 1) + * + * Results: + * 0 on failure, 1 on success [in which case the found path is put + * in the result buffer]. + * + * Side Effects: + *----------------------------------------------------------------------- + */ +int +Dir_FindHereOrAbove(char *here, char *search_path, char *result, int rlen) +{ + struct stat st; + char dirbase[MAXPATHLEN + 1], *db_end; + char try[MAXPATHLEN + 1], *try_end; + + /* copy out our starting point */ + snprintf(dirbase, sizeof(dirbase), "%s", here); + db_end = dirbase + strlen(dirbase); + + /* loop until we determine a result */ + while (1) { + /* try and stat(2) it ... */ + snprintf(try, sizeof(try), "%s/%s", dirbase, search_path); + if (stat(try, &st) != -1) { + /* + * Success! If we found a file, chop off + * the filename so we return a directory. + */ + if ((st.st_mode & S_IFMT) != S_IFDIR) { + try_end = try + strlen(try); + while (try_end > try && *try_end != '/') + try_end--; + if (try_end > try) + *try_end = 0; /* chop! */ + } + + /* + * Done! + */ + snprintf(result, rlen, "%s", try); + return(1); + } + + /* + * Nope, we didn't find it. If we used up dirbase we've + * reached the root and failed. + */ + if (db_end == dirbase) + break; /* Failed! */ + + /* + * truncate dirbase from the end to move up a dir + */ + while (db_end > dirbase && *db_end != '/') + db_end--; + *db_end = 0; /* chop! */ + + } /* while (1) */ + + /* + * We failed... + */ + return(0); +} + +/*- + *----------------------------------------------------------------------- * Dir_MTime -- * Find the modification time of the file described by gn along the * search path dirSearchPath. |