#include "perl.h"
#include "XSUB.h"
-#ifdef NETWARE
-#include "nwutil.h"
-#endif
-
#ifdef USE_KERN_PROC_PATHNAME
# include <sys/sysctl.h>
#endif
# include <mach-o/dyld.h>
#endif
-/* Note: Functions in this file must not have bool parameters. When
- PERL_BOOL_AS_CHAR is #defined, mach-o/dyld.h overrides it in this file
- by #including stdbool.h, so the function parameters here would conflict
- with those in proto.h.
-*/
-
void
Perl_set_caret_X(pTHX) {
GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
- if (tmpgv) {
- SV *const caret_x = GvSV(tmpgv);
+ SV *const caret_x = GvSV(tmpgv);
#if defined(OS2)
- sv_setpv(caret_x, os2_execname(aTHX));
+ sv_setpv(caret_x, os2_execname(aTHX));
+ return;
+#elif defined(WIN32)
+ char *ansi;
+ WCHAR widename[MAX_PATH];
+ GetModuleFileNameW(NULL, widename, sizeof(widename)/sizeof(WCHAR));
+ ansi = win32_ansipath(widename);
+ sv_setpv(caret_x, ansi);
+ win32_free(ansi);
+ return;
#else
-# ifdef USE_KERN_PROC_PATHNAME
- size_t size = 0;
- int mib[4];
- mib[0] = CTL_KERN;
- mib[1] = KERN_PROC;
- mib[2] = KERN_PROC_PATHNAME;
- mib[3] = -1;
+ /* We can try a platform-specific one if possible; if it fails, or we
+ * aren't running on a suitable platform, we'll fall back to argv[0]. */
+# ifdef USE_KERN_PROC_PATHNAME
+ size_t size = 0;
+ int mib[4];
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_PROC;
+ mib[2] = KERN_PROC_PATHNAME;
+ mib[3] = -1;
- if (sysctl(mib, 4, NULL, &size, NULL, 0) == 0
- && size > 0 && size < MAXPATHLEN * MAXPATHLEN) {
- sv_grow(caret_x, size);
+ if (sysctl(mib, 4, NULL, &size, NULL, 0) == 0
+ && inRANGE(size, 1, -1 + MAXPATHLEN * MAXPATHLEN)) {
+ sv_grow(caret_x, size);
- if (sysctl(mib, 4, SvPVX(caret_x), &size, NULL, 0) == 0
- && size > 2) {
- SvPOK_only(caret_x);
- SvCUR_set(caret_x, size - 1);
- SvTAINT(caret_x);
- return;
- }
+ if (sysctl(mib, 4, SvPVX(caret_x), &size, NULL, 0) == 0
+ && size > 2) {
+ SvPOK_only(caret_x);
+ SvCUR_set(caret_x, size - 1);
+ SvTAINT(caret_x);
+ return;
}
-# elif defined(USE_NSGETEXECUTABLEPATH)
- char buf[1];
- uint32_t size = sizeof(buf);
+ }
+# elif defined(USE_NSGETEXECUTABLEPATH)
+ char buf[1];
+ uint32_t size = sizeof(buf);
- _NSGetExecutablePath(buf, &size);
- if (size < MAXPATHLEN * MAXPATHLEN) {
- sv_grow(caret_x, size);
- if (_NSGetExecutablePath(SvPVX(caret_x), &size) == 0) {
- char *const tidied = realpath(SvPVX(caret_x), NULL);
- if (tidied) {
- sv_setpv(caret_x, tidied);
- free(tidied);
- } else {
- SvPOK_only(caret_x);
- SvCUR_set(caret_x, size);
- }
- return;
+ _NSGetExecutablePath(buf, &size);
+ if (size < MAXPATHLEN * MAXPATHLEN) {
+ sv_grow(caret_x, size);
+ if (_NSGetExecutablePath(SvPVX(caret_x), &size) == 0) {
+ char *const tidied = realpath(SvPVX(caret_x), NULL);
+ if (tidied) {
+ sv_setpv(caret_x, tidied);
+ free(tidied);
+ } else {
+ SvPOK_only(caret_x);
+ SvCUR_set(caret_x, size);
}
+ return;
}
-# elif defined(HAS_PROCSELFEXE)
- char buf[MAXPATHLEN];
- int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
+ }
+# elif defined(HAS_PROCSELFEXE)
+ char buf[MAXPATHLEN];
+ SSize_t len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
+ /* NOTE: if the length returned by readlink() is sizeof(buf) - 1,
+ * it is impossible to know whether the result was truncated. */
- /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
- includes a spurious NUL which will cause $^X to fail in system
- or backticks (this will prevent extensions from being built and
- many tests from working). readlink is not meant to add a NUL.
- Normal readlink works fine.
- */
- if (len > 0 && buf[len-1] == '\0') {
- len--;
- }
+ if (len != -1) {
+ buf[len] = '\0';
+ }
- /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
- returning the text "unknown" from the readlink rather than the path
- to the executable (or returning an error from the readlink). Any
- valid path has a '/' in it somewhere, so use that to validate the
- result. See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
- */
- if (len > 0 && memchr(buf, '/', len)) {
- sv_setpvn(caret_x, buf, len);
- return;
- }
-# endif
- /* Fallback to this: */
- sv_setpv(caret_x, PL_origargv[0]);
-#endif
+ /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
+ includes a spurious NUL which will cause $^X to fail in system
+ or backticks (this will prevent extensions from being built and
+ many tests from working). readlink is not meant to add a NUL.
+ Normal readlink works fine.
+ */
+ if (len > 0 && buf[len-1] == '\0') {
+ len--;
}
+
+ /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
+ returning the text "unknown" from the readlink rather than the path
+ to the executable (or returning an error from the readlink). Any
+ valid path has a '/' in it somewhere, so use that to validate the
+ result. See https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=35703
+ */
+ if (len > 0 && memchr(buf, '/', len)) {
+ sv_setpvn(caret_x, buf, len);
+ return;
+ }
+# endif
+ /* Fallback to this: */
+ sv_setpv(caret_x, PL_origargv[0]);
+#endif
}
/*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: nil
- * End:
- *
* ex: set ts=8 sts=4 sw=4 et:
*/
https://perl5.git.perl.org / perl5.git / blobdiff