* Thus, when their signature changes, they don't need updates in a .h
* file somewhere, but they do need updates in the Lisp code. FIXME:
* It would be nice to enforce this at compile time. It mighn't even
- * be all that hard: make the cross-compiler versions of DEF-ALIEN-FOO
+ * be all that hard: make the cross-compiler versions of DEFINE-ALIEN-FOO
* macros accumulate strings in a list which then gets written out at
* the end of sbcl2.h at the end of cross-compilation, then rerun
* 'make' in src/runtime/ using the new sbcl2.h as sbcl.h (and make
#include <sys/types.h>
#include <dirent.h>
#include <sys/stat.h>
+#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <pwd.h>
+#include <stdio.h>
-#include "runtime.h"
#include "sbcl.h"
+#include "runtime.h"
#include "util.h"
-\f
+
+/* Although it might seem as though this should be in some standard
+ Unix header, according to Perry E. Metzger, in a message on
+ sbcl-devel dated 2004-03-29, this is the POSIXly-correct way of
+ using environ: by an explicit declaration. -- CSR, 2004-03-30 */
+extern char **environ;
+\f
/*
* stuff needed by CL:DIRECTORY and other Lisp directory operations
*/
char**
alloc_directory_lispy_filenames(const char *directory_name)
{
- DIR *dir_ptr;
+ DIR *dir_ptr = opendir(directory_name);
char **result = 0;
- if (dir_ptr = opendir(directory_name)) { /* if opendir success */
-
- struct voidacc va;
-
- if (0 == voidacc_ctor(&va)) { /* if voidacc_ctor success */
- struct dirent *dirent_ptr;
-
- while (dirent_ptr = readdir(dir_ptr)) { /* until end of data */
- char* original_name = dirent_ptr->d_name;
- if (is_lispy_filename(original_name)) {
- /* strdup(3) is in Linux and *BSD. If you port
- * somewhere else that doesn't have it, it's easy
- * to reimplement. */
- char* dup_name = strdup(original_name);
- if (!dup_name) { /* if strdup failure */
- goto dtors;
- }
- if (voidacc_acc(&va, dup_name)) { /* if acc failure */
- goto dtors;
- }
- }
- }
- result = (char**)voidacc_give_away_result(&va);
- }
+ if (dir_ptr) { /* if opendir success */
+
+ struct voidacc va;
+
+ if (0 == voidacc_ctor(&va)) { /* if voidacc_ctor success */
+ struct dirent *dirent_ptr;
+
+ while ( (dirent_ptr = readdir(dir_ptr)) ) { /* until end of data */
+ char* original_name = dirent_ptr->d_name;
+ if (is_lispy_filename(original_name)) {
+ /* strdup(3) is in Linux and *BSD. If you port
+ * somewhere else that doesn't have it, it's easy
+ * to reimplement. */
+ char* dup_name = strdup(original_name);
+ if (!dup_name) { /* if strdup failure */
+ goto dtors;
+ }
+ if (voidacc_acc(&va, dup_name)) { /* if acc failure */
+ goto dtors;
+ }
+ }
+ }
+ result = (char**)voidacc_give_away_result(&va);
+ }
dtors:
- voidacc_dtor(&va);
- /* ignoring closedir(3) return code, since what could we do?
- *
- * "Never ask questions you don't want to know the answer to."
- * -- William Irving Zumwalt (Rich Cook, _The Wizardry Quested_) */
- closedir(dir_ptr);
+ voidacc_dtor(&va);
+ /* ignoring closedir(3) return code, since what could we do?
+ *
+ * "Never ask questions you don't want to know the answer to."
+ * -- William Irving Zumwalt (Rich Cook, _The Wizardry Quested_) */
+ closedir(dir_ptr);
}
return result;
/* Free the strings. */
for (p = directory_lispy_filenames; *p; ++p) {
- free(*p);
+ free(*p);
}
/* Free the table of strings. */
/* a wrapped version of readlink(2):
* -- If path isn't a symlink, or is a broken symlink, return 0.
* -- If path is a symlink, return a newly allocated string holding
- * the thing it's linked to.
- */
+ * the thing it's linked to. */
char *
wrapped_readlink(char *path)
{
- int strlen_path = strlen(path);
int bufsiz = strlen(path) + 16;
while (1) {
- char *result = malloc(bufsiz);
- int n_read = readlink(path, result, n_read);
- if (n_read < 0) {
- return 0;
- } else if (n_read < bufsiz) {
- result[n_read] = 0;
- return result;
- } else {
- free(result);
- bufsiz *= 2;
- }
+ char *result = malloc(bufsiz);
+ int n_read = readlink(path, result, bufsiz);
+ if (n_read < 0) {
+ free(result);
+ return 0;
+ } else if (n_read < bufsiz) {
+ result[n_read] = 0;
+ return result;
+ } else {
+ free(result);
+ bufsiz *= 2;
+ }
}
}
\f
* when values are small.
*
* FIXME: But of course we should fix the FFI so that we can use the
- * actual 64-bit values instead. */
-typedef long ffi_dev_t; /* since Linux dev_t can be 64 bits */
+ * actual 64-bit values instead. In fact, we probably have by now
+ * (2003-10-03) on all working platforms except MIPS and HPPA; if some
+ * motivated spark would simply fix those, this hack could go away.
+ * -- CSR, 2003-10-03
+ *
+ * Some motivated spark fixed MIPS. -- ths, 2005-10-06 */
+
+#ifdef LISP_FEATURE_MIPS
+typedef unsigned long ffi_dev_t; /* Linux/MIPS struct stat doesn't use dev_t */
+typedef off_t ffi_off_t;
+#else
+typedef u32 ffi_dev_t; /* since Linux dev_t can be 64 bits */
typedef u32 ffi_off_t; /* since OpenBSD 2.8 st_size is 64 bits */
+#endif
/* a representation of stat(2) results which doesn't depend on CPU or OS */
struct stat_wrapper {
time_t wrapped_st_ctime; /* time_t of last change */
};
-static void
+static void
copy_to_stat_wrapper(struct stat_wrapper *to, struct stat *from)
{
#define FROB(stem) to->wrapped_st_##stem = from->st_##stem
struct stat real_buf;
int ret;
if ((ret = stat(file_name,&real_buf)) >= 0)
- copy_to_stat_wrapper(buf, &real_buf);
+ copy_to_stat_wrapper(buf, &real_buf);
return ret;
}
{
struct stat real_buf;
int ret;
- if ((ret = lstat(file_name,&real_buf)) >= 0)
- copy_to_stat_wrapper(buf, &real_buf);
+ if ((ret = lstat(file_name,&real_buf)) >= 0)
+ copy_to_stat_wrapper(buf, &real_buf);
return ret;
}
struct stat real_buf;
int ret;
if ((ret = fstat(filedes,&real_buf)) >= 0)
- copy_to_stat_wrapper(buf, &real_buf);
+ copy_to_stat_wrapper(buf, &real_buf);
return ret;
}
+\f
+/*
+ * getpwuid() stuff
+ */
+
+/* Return a newly-allocated string holding the username for "uid", or
+ * NULL if there's no such user.
+ *
+ * KLUDGE: We also return NULL if malloc() runs out of memory
+ * (returning strdup() result) since it's not clear how to handle that
+ * error better. -- WHN 2001-12-28 */
+char *
+uid_username(int uid)
+{
+ struct passwd *p = getpwuid(uid);
+ if (p) {
+ /* The object *p is a static struct which'll be overwritten by
+ * the next call to getpwuid(), so it'd be unsafe to return
+ * p->pw_name without copying. */
+ return strdup(p->pw_name);
+ } else {
+ return 0;
+ }
+}
+
+char *
+uid_homedir(uid_t uid)
+{
+ struct passwd *p = getpwuid(uid);
+ if(p) {
+ /* Let's be careful about this, shall we? */
+ size_t len = strlen(p->pw_dir);
+ if (p->pw_dir[len-1] == '/') {
+ return strdup(p->pw_dir);
+ } else {
+ char *result = malloc(len + 2);
+ if (result) {
+ int nchars = sprintf(result,"%s/",p->pw_dir);
+ if (nchars == len + 1) {
+ return result;
+ } else {
+ return 0;
+ }
+ } else {
+ return 0;
+ }
+ }
+ } else {
+ return 0;
+ }
+}
+\f
+/*
+ * functions to get miscellaneous C-level variables
+ *
+ * (Doing this by calling functions lets us borrow the smarts of the C
+ * linker, so that things don't blow up when libc versions and thus
+ * variable locations change between compile time and run time.)
+ */
+
+char **
+wrapped_environ()
+{
+ return environ;
+}
projects / sbcl.git / blobdiff