diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | Src/Modules/files.c | 5 | ||||
| -rw-r--r-- | Src/Modules/parameter.c | 10 | ||||
| -rw-r--r-- | Src/compat.c | 66 | ||||
| -rw-r--r-- | Src/system.h | 17 |
5 files changed, 56 insertions, 47 deletions
@@ -1,5 +1,10 @@ 2000-08-13 Bart Schaefer <schaefer@zsh.org> + * 12604: Src/compat.c, Src/system.h, Src/Modules/files.c, + Src/Modules/parameter.c: Remove calls to zpathmax(); fix some + serious errors in zpathmax() but wrap it in #if 0 anyway; minor + fixes to comments and coding style for zopenmax(). + * 12601: aczsh.m4, configure.in: configure --enable-cflags and the like, i.e., with no =... part, should preserve the environment values for CFLAGS etc. rather than erase them. diff --git a/Src/Modules/files.c b/Src/Modules/files.c index d01a59b03..54b399866 100644 --- a/Src/Modules/files.c +++ b/Src/Modules/files.c @@ -91,11 +91,6 @@ bin_mkdir(char *nam, char **args, char *ops, int func) while(ptr > *args + (**args == '/') && *--ptr == '/') *ptr = 0; - if(zpathmax(unmeta(*args)) < 0) { - zwarnnam(nam, "%s: %e", *args, errno); - err = 1; - continue; - } if(ops['p']) { char *ptr = *args; diff --git a/Src/Modules/parameter.c b/Src/Modules/parameter.c index b2b3657c0..e8a0c09a0 100644 --- a/Src/Modules/parameter.c +++ b/Src/Modules/parameter.c @@ -1397,9 +1397,8 @@ scanpmjobdirs(HashTable ht, ScanFunc func, int flags) static void setpmnameddir(Param pm, char *value) { - errno = 0; - if (!value || *value != '/' || zpathmax(value) < 0) - zwarn((errno ? "%s: %e" : "invalid value: %s"), value, errno); + if (!value || *value != '/') + zwarn("invalid value: %s", value, 0); else adduserdir(pm->nam, value, 0, 1); zsfree(value); @@ -1443,9 +1442,8 @@ setpmnameddirs(Param pm, HashTable ht) v.arr = NULL; v.pm = (Param) hn; - errno = 0; - if (!(val = getstrvalue(&v)) || *val != '/' || zpathmax(val) < 0) - zwarn((errno ? "%s: %e" : "invalid value: %s"), val, errno); + if (!(val = getstrvalue(&v)) || *val != '/') + zwarn("invalid value: %s", val, 0); else adduserdir(hn->nam, val, 0, 1); } diff --git a/Src/compat.c b/Src/compat.c index 88ceac2c8..8cfb8a3a5 100644 --- a/Src/compat.c +++ b/Src/compat.c @@ -105,7 +105,23 @@ strerror(int errnum) #endif -#ifdef HAVE_PATHCONF +#if 0 +/* pathconf(_PC_PATH_MAX) is not currently useful to zsh. The value * + * returned varies depending on a number of factors, e.g. the amount * + * of memory available to the operating system at a given time; thus * + * it can't be used for buffer allocation, or even as an indication * + * of whether an attempt to use or create a given pathname may fail * + * at any future time. * + * * + * The call is also permitted to fail if the argument path is not an * + * existing directory, so even to make sense of that one must search * + * for a valid directory somewhere in the path and adjust. Even if * + * it succeeds, the return value is relative to the input directory, * + * and therefore potentially relative to the length of the shortest * + * path either to that directory or to our working directory. * + * * + * Finally, see the note below for glibc; detection of pathconf() is * + * not by itself an indication that it works reliably. */ /* The documentation for pathconf() says something like: * * The limit is returned, if one exists. If the system does * @@ -114,34 +130,24 @@ strerror(int errnum) * -1 is returned, and errno is set to reflect the nature of * * the error. * * * - * This is less useful than may be, as one must reset errno to 0 (or * + * System calls are not permitted to set errno to 0; but we must (or * * some other flag value) in order to determine that the resource is * * unlimited. What use is leaving errno unchanged? Instead, define * * a wrapper that resets errno to 0 and returns 0 for "the system * - * does not have a limit," so that -1 always means a real error. * - * * - * This is replaced by a macro from system.h if not HAVE_PATHCONF. * - * - * Note that the length of a relative path is compared without first * - * prepending the current directory, if pathconf() does not return * - * an error. This is for consistency with the macro and with older * - * zsh behavior; it may be problematic in the ENOENT/ENOTDIR cases. */ + * does not have a limit," so that -1 always means a real error. */ /**/ mod_export long zpathmax(char *dir) { +#ifdef HAVE_PATHCONF long pathmax; errno = 0; if ((pathmax = pathconf(dir, _PC_PATH_MAX)) >= 0) { - /* This code is redundant if pathconf works correctly, but * - * some versions of glibc pathconf return a hardwired value. */ - if (strlen(dir) < pathmax) - return pathmax; - else - errno = ENAMETOOLONG; - } else if (errno == ENOENT || errno == ENOTDIR) { + /* Some versions of glibc pathconf return a hardwired value! */ + return pathmax; + } else if (errno == EINVAL || errno == ENOENT || errno == ENOTDIR) { /* Work backward to find a directory, until we run out of path. */ char *tail = strrchr(dir, '/'); while (tail > dir && tail[-1] == '/') @@ -158,8 +164,9 @@ zpathmax(char *dir) pathmax = pathconf(".", _PC_PATH_MAX); } if (pathmax > 0) { - if (strlen(dir) < pathmax) - return pathmax; + long taillen = (tail ? strlen(tail) : (strlen(dir) + 1)); + if (taillen < pathmax) + return pathmax - taillen; else errno = ENAMETOOLONG; } @@ -168,12 +175,20 @@ zpathmax(char *dir) return -1; else return 0; /* pathmax should be considered unlimited */ -} +#else + long dirlen = strlen(dir); + + /* The following is wrong if dir is not an absolute path. */ + return ((long) ((dirlen >= PATH_MAX) ? + ((errno = ENAMETOOLONG), -1) : + ((errno = 0), PATH_MAX - dirlen))); #endif +} +#endif // 0 #ifdef HAVE_SYSCONF -/* This is replaced by a macro from system.h if not HAVE_PATHCONF. * - * 0 is returned if _SC_OPEN_MAX is unavailable * +/* This is replaced by a macro from system.h if not HAVE_SYSCONF. * + * 0 is returned by sysconf if _SC_OPEN_MAX is unavailable; * * -1 is returned on error * * * * Neither of these should happen, but resort to OPEN_MAX rather * @@ -183,10 +198,9 @@ zpathmax(char *dir) mod_export long zopenmax(void) { - long openmax; - - openmax = sysconf(_SC_OPEN_MAX); - if(openmax < 1) + long openmax = sysconf(_SC_OPEN_MAX); + + if (openmax < 1) return OPEN_MAX; else return openmax; diff --git a/Src/system.h b/Src/system.h index 2ed75b621..3d23f5761 100644 --- a/Src/system.h +++ b/Src/system.h @@ -200,18 +200,15 @@ struct timezone { # ifdef MAXPATHLEN # define PATH_MAX MAXPATHLEN # else - /* so we will just pick something */ -# define PATH_MAX 1024 +# ifdef _POSIX_PATH_MAX +# define PATH_MAX _POSIX_PATH_MAX +# else + /* so we will just pick something */ +# define PATH_MAX 1024 +# endif # endif #endif -#ifndef HAVE_PATHCONF -# define zpathmax(X) ((long)((strlen(X) >= PATH_MAX) ? \ - ((errno = ENAMETOOLONG), -1) : \ - ((errno = 0), PATH_MAX))) -#endif -/* we should be getting this value from sysconf(_SC_OPEN_MAX) */ -/* but this is too much trouble */ #ifndef OPEN_MAX # ifdef NOFILE # define OPEN_MAX NOFILE @@ -221,7 +218,7 @@ struct timezone { # endif #endif #ifndef HAVE_SYSCONF -# define zopenmax() (long) OPEN_MAX +# define zopenmax() ((long) OPEN_MAX) #endif #ifdef HAVE_FCNTL_H |