diff options
author | obrien <obrien@FreeBSD.org> | 2010-01-04 18:57:22 +0000 |
---|---|---|
committer | obrien <obrien@FreeBSD.org> | 2010-01-04 18:57:22 +0000 |
commit | d2744b88e92689da349b5de750666f235ea9a4ce (patch) | |
tree | a3e67a307d511e8bb94e2cef9388c3b1c989d519 /usr.bin/make | |
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')
-rw-r--r-- | usr.bin/make/dir.c | 83 | ||||
-rw-r--r-- | usr.bin/make/dir.h | 1 | ||||
-rw-r--r-- | usr.bin/make/main.c | 52 | ||||
-rw-r--r-- | usr.bin/make/make.1 | 33 |
4 files changed, 158 insertions, 11 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. diff --git a/usr.bin/make/dir.h b/usr.bin/make/dir.h index 03481b8..1ae89ae 100644 --- a/usr.bin/make/dir.h +++ b/usr.bin/make/dir.h @@ -56,6 +56,7 @@ TAILQ_HEAD(Path, PathElement); void Dir_Init(void); void Dir_InitDot(void); Boolean Dir_HasWildcards(const char *); +int Dir_FindHereOrAbove(char *, char *, char *, int); int Dir_MTime(struct GNode *); void Dir_PrintDirectories(void); diff --git a/usr.bin/make/main.c b/usr.bin/make/main.c index eec6bbf..91638d4 100644 --- a/usr.bin/make/main.c +++ b/usr.bin/make/main.c @@ -368,6 +368,7 @@ MainParseArgs(int argc, char **argv) { int c; Boolean found_dd = FALSE; + char found_dir[MAXPATHLEN + 1]; /* for searching for sys.mk */ rearg: optind = 1; /* since we're called more than once */ @@ -394,6 +395,8 @@ rearg: case 'C': if (chdir(optarg) == -1) err(1, "chdir %s", optarg); + if (getcwd(curdir, MAXPATHLEN) == NULL) + err(2, NULL); break; case 'D': Var_SetGlobal(optarg, "1"); @@ -492,7 +495,15 @@ rearg: MFLAGS_append("-k", NULL); break; case 'm': - Path_AddDir(&sysIncPath, optarg); + /* look for magic parent directory search string */ + if (strncmp(".../", optarg, 4) == 0) { + if (!Dir_FindHereOrAbove(curdir, optarg + 4, + found_dir, sizeof(found_dir))) + break; /* nothing doing */ + Path_AddDir(&sysIncPath, found_dir); + } else { + Path_AddDir(&sysIncPath, optarg); + } MFLAGS_append("-m", optarg); break; case 'n': @@ -869,6 +880,7 @@ main(int argc, char **argv) char mdpath[MAXPATHLEN]; char obpath[MAXPATHLEN]; char cdpath[MAXPATHLEN]; + char found_dir[MAXPATHLEN + 1]; /* for searching for sys.mk */ char *cp = NULL, *start; save_argv = argv; @@ -1022,6 +1034,12 @@ main(int argc, char **argv) Job_SetPrefix(); /* + * Find where we are... + */ + if (getcwd(curdir, MAXPATHLEN) == NULL) + err(2, NULL); + + /* * First snag things out of the MAKEFLAGS environment * variable. Then parse the command line arguments. */ @@ -1030,11 +1048,8 @@ main(int argc, char **argv) MainParseArgs(argc, argv); /* - * Find where we are... + * Verify that cwd is sane (after -C may have changed it). */ - if (getcwd(curdir, MAXPATHLEN) == NULL) - err(2, NULL); - { struct stat sa; @@ -1132,18 +1147,37 @@ main(int argc, char **argv) * as dir1:...:dirn) to the system include path. */ if (TAILQ_EMPTY(&sysIncPath)) { - char syspath[] = PATH_DEFSYSPATH; + char defsyspath[] = PATH_DEFSYSPATH; + char *syspath = getenv("MAKESYSPATH"); + + /* + * If no user-supplied system path was given (thru -m option) + * add the directories from the DEFSYSPATH (more than one may + * be given as dir1:...:dirn) to the system include path. + */ + if (syspath == NULL || *syspath == '\0') + syspath = defsyspath; + else + syspath = estrdup(syspath); for (start = syspath; *start != '\0'; start = cp) { for (cp = start; *cp != '\0' && *cp != ':'; cp++) continue; - if (*cp == '\0') { - Path_AddDir(&sysIncPath, start); - } else { + if (*cp == ':') { *cp++ = '\0'; + } + /* look for magic parent directory search string */ + if (strncmp(".../", start, 4) == 0) { + if (Dir_FindHereOrAbove(curdir, start + 4, + found_dir, sizeof(found_dir))) { + Path_AddDir(&sysIncPath, found_dir); + } + } else { Path_AddDir(&sysIncPath, start); } } + if (syspath != defsyspath) + free(syspath); } /* diff --git a/usr.bin/make/make.1 b/usr.bin/make/make.1 index a4e837c..2c478a3 100644 --- a/usr.bin/make/make.1 +++ b/usr.bin/make/make.1 @@ -240,6 +240,36 @@ The system include path will always be appended to the search path used for "..."-style inclusions and makefile searches (see the .Fl I option). +.Pp +If a file or directory name in the +.Fl m +argument (or the +.Ev MAKESYSPATH +environment variable) starts with the string +.Qq \&.../ +then +.Nm +will search for the specified file or directory named in the remaining part +of the argument string. +The search starts with the current directory of the Makefile and then works +upward towards the root of the filesystem. +If the search is successful, +then the resulting directory replaces the +.Qq \&.../ +specification in the +.Fl m +argument. +If used, this feature allows +.Nm +to easily search in the current source tree for customized sys.mk files +(e.g. by using +.Qq \&.../mk/sys.mk +as an argument). +Note that a +.Fl C +that are earlier on the command line affect where +.Fl m Qq \&.../ +searches. .It Fl n Display the commands that would have been executed, but do not actually execute them. @@ -1665,8 +1695,9 @@ utility uses the following environment variables, if they exist: .Ev MAKE , .Ev MAKEFLAGS , .Ev MAKEOBJDIR , +.Ev MAKEOBJDIRPREFIX , and -.Ev MAKEOBJDIRPREFIX . +.Ev MAKESYSPATH . .Sh FILES .Bl -tag -width /usr/share/doc/psd/12.make -compact .It Pa .depend |