Initial revision

1 files changed, 0 insertions, 121 deletions

diff --git a/which.c b/which.c
deleted file mode 100644
index 372cc92..0000000
--- a/which.c
+++ /dev/null
@@ -1,121 +0,0 @@
-/* which.c: check to see if a file is executable.
-
-   This function was originally written with Maarten Litmaath's which.c as
-   a template, but was changed in order to accomodate the possibility of
-   rc's running setuid or the possibility of executing files not in the
-   primary group. Much of this file has been re-vamped by Paul Haahr.
-   I re-re-vamped the functions that Paul supplied to correct minor bugs
-   and to strip out unneeded functionality.
-*/
-
-#include "rc.h"
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
-#define X_USR 0100
-#define X_GRP 0010
-#define X_OTH 0001
-#define X_ALL (X_USR|X_GRP|X_OTH)
-
-extern int stat(const char *, struct stat *);
-
-static bool initialized = FALSE;
-static uid_t uid;
-static gid_t gid;
-
-#if HAVE_GETGROUPS
-static int ngroups;
-static GETGROUPS_T *gidset;
-
-/* determine whether gid lies in gidset */
-
-static int ingidset(gid_t g) {
-	gid_t i;
-	for (i = 0; i < ngroups; ++i)
-		if (g == gidset[i])
-			return 1;
-	return 0;
-}
-#endif
-
-/*
-   A home-grown access/stat. Does the right thing for group-executable files.
-   Returns a bool instead of this -1 nonsense.
-*/
-
-static bool rc_access(char *path, bool verbose) {
-	struct stat st;
-	int mask;
-	if (stat(path, &st) != 0) {
-		if (verbose) /* verbose flag only set for absolute pathname */
-			uerror(path);
-		return FALSE;
-	}
-	if (uid == 0)
-		mask = X_ALL;
-	else if (uid == st.st_uid)
-		mask = X_USR;
-#if HAVE_GETGROUPS
-	else if (gid == st.st_gid || ingidset(st.st_gid))
-#else
-	else if (gid == st.st_gid)
-#endif
-		mask = X_GRP;
-	else
-		mask = X_OTH;
-	if (((st.st_mode & S_IFMT) == S_IFREG) && (st.st_mode & mask))
-		return TRUE;
-	errno = EACCES;
-	if (verbose)
-		uerror(path);
-	return FALSE;
-}
-
-/* return a full pathname by searching $path, and by checking the status of the file */
-
-extern char *which(char *name, bool verbose) {
-	static char *test = NULL;
-	static size_t testlen = 0;
-	List *path;
-	int len;
-	if (name == NULL)	/* no filename? can happen with "> foo" as a command */
-		return NULL;
-	if (!initialized) {
-		initialized = TRUE;
-		uid = geteuid();
-		gid = getegid();
-#if HAVE_GETGROUPS
-		ngroups = getgroups(0, (gid_t *)0);
-		gidset = malloc(ngroups * sizeof(gid_t));
-		if (!gidset)
-			uerror("malloc");
-		else
-			getgroups(ngroups, gidset);
-#endif
-	}
-	if (isabsolute(name)) /* absolute pathname? */
-		return rc_access(name, verbose) ? name : NULL;
-	len = strlen(name);
-	for (path = varlookup("path"); path != NULL; path = path->n) {
-		size_t need = strlen(path->w) + len + 2; /* one for null terminator, one for the '/' */
-		if (testlen < need) {
-			efree(test);
-			test = ealloc(testlen = need);
-		}
-		if (*path->w == '\0') {
-			strcpy(test, name);
-		} else {
-			strcpy(test, path->w);
-			if (!streq(test, "/")) /* "//" is special to POSIX */
-				strcat(test, "/");
-			strcat(test, name);
-		}
-		if (rc_access(test, FALSE))
-			return test;
-	}
-	if (verbose)
-		fprint(2, "%s not found\n", name);
-	return NULL;
-}