diff options
-rw-r--r-- | bin/sh/cd.c | 83 |
1 files changed, 45 insertions, 38 deletions
diff --git a/bin/sh/cd.c b/bin/sh/cd.c index d52c9b8..4abe91e 100644 --- a/bin/sh/cd.c +++ b/bin/sh/cd.c @@ -68,7 +68,9 @@ STATIC int cdlogical(char *); STATIC int cdphysical(char *); STATIC int docd(char *, int, int); STATIC char *getcomponent(void); -STATIC int updatepwd(char *); +STATIC char *findcwd(char *); +STATIC void updatepwd(char *); +STATIC char *getpwd2(char *, size_t); STATIC char *curdir = NULL; /* current working directory */ STATIC char *prevdir; /* previous working directory */ @@ -201,10 +203,11 @@ cdlogical(char *dest) } INTOFF; - if (updatepwd(badstat ? NULL : dest) < 0 || chdir(curdir) < 0) { + if ((p = findcwd(badstat ? NULL : dest)) == NULL || chdir(p) < 0) { INTON; return (-1); } + updatepwd(p); INTON; return (0); } @@ -212,12 +215,14 @@ cdlogical(char *dest) STATIC int cdphysical(char *dest) { + char *p; INTOFF; - if (chdir(dest) < 0 || updatepwd(NULL) < 0) { + if (chdir(dest) < 0 || (p = findcwd(NULL)) == NULL) { INTON; return (-1); } + updatepwd(p); INTON; return (0); } @@ -247,38 +252,20 @@ getcomponent(void) } -/* - * Update curdir (the name of the current directory) in response to a - * cd command. We also call hashcd to let the routines in exec.c know - * that the current directory has changed. - */ -STATIC int -updatepwd(char *dir) +STATIC char * +findcwd(char *dir) { char *new; char *p; - hashcd(); /* update command hash table */ - /* * If our argument is NULL, we don't know the current directory * any more because we traversed a symbolic link or something * we couldn't stat(). */ if (dir == NULL || curdir == NULL) { - if (prevdir) - ckfree(prevdir); - INTOFF; - prevdir = curdir; - curdir = NULL; - if (getpwd() == NULL) { - INTON; - return (-1); - } - setvar("PWD", curdir, VEXPORT); - setvar("OLDPWD", prevdir, VEXPORT); - INTON; - return (0); + p = stalloc(PATH_MAX); + return getpwd2(p, PATH_MAX); } cdcomppath = stalloc(strlen(dir) + 1); scopy(dir, cdcomppath); @@ -302,16 +289,25 @@ updatepwd(char *dir) if (new == stackblock()) STPUTC('/', new); STACKSTRNUL(new); - INTOFF; + return stackblock(); +} + +/* + * Update curdir (the name of the current directory) in response to a + * cd command. We also call hashcd to let the routines in exec.c know + * that the current directory has changed. + */ +STATIC void +updatepwd(char *dir) +{ + hashcd(); /* update command hash table */ + if (prevdir) ckfree(prevdir); prevdir = curdir; - curdir = savestr(stackblock()); + curdir = savestr(dir); setvar("PWD", curdir, VEXPORT); setvar("OLDPWD", prevdir, VEXPORT); - INTON; - - return (0); } int @@ -355,17 +351,31 @@ pwdcmd(int argc, char **argv) } /* - * Find out what the current directory is. If we already know the current - * directory, this routine returns immediately. + * Get the current directory and cache the result in curdir. */ char * getpwd(void) { char buf[PATH_MAX]; + char *p; if (curdir) return curdir; - if (getcwd(buf, sizeof(buf)) == NULL) { + + p = getpwd2(buf, sizeof(buf)); + if (p != NULL) + curdir = savestr(p); + + return curdir; +} + +/* + * Return the current directory. + */ +STATIC char * +getpwd2(char *buf, size_t size) +{ + if (getcwd(buf, size) == NULL) { char *pwd = getenv("PWD"); struct stat stdot, stpwd; @@ -373,12 +383,9 @@ getpwd(void) stat(pwd, &stpwd) != -1 && stdot.st_dev == stpwd.st_dev && stdot.st_ino == stpwd.st_ino) { - curdir = savestr(pwd); - return curdir; + return pwd; } return NULL; } - curdir = savestr(buf); - - return curdir; + return buf; } |