Initial revision

1 files changed, 0 insertions, 61 deletions

diff --git a/execve.c b/execve.c
deleted file mode 100644
index b21b30c..0000000
--- a/execve.c
+++ /dev/null
@@ -1,61 +0,0 @@
-/* execve.c: an execve() for geriatric unices without #! */
-
-/*
-   NOTE: this file depends on a hack in footobar.c which places two free spots before
-   av[][] so that execve does not have to call malloc.
-*/
-
-#include <errno.h>
-#include "rc.h"
-
-#define giveupif(x) { if (x) goto fail; }
-
-extern int my_execve(const char *path, const char **av, const char **ev) {
-	int fd, len, fst, snd, end;
-	bool noarg;
-	char pb[256]; /* arbitrary but generous limit */
-	execve(path, av, ev);
-	if (errno != ENOEXEC)
-		return -1;
-	fd = rc_open(path, rFrom);
-	giveupif(fd < 0);
-	len = read(fd, pb, sizeof pb);
-	close(fd);
-	/* reject scripts which don't begin with #! */
-	giveupif(len <= 0 || pb[0] != '#' || pb[1] != '!');
-	for (fst = 2; fst < len && (pb[fst] == ' ' || pb[fst] == '\t'); fst++)
-		; /* skip leading whitespace */
-	giveupif(fst == len);
-	for (snd = fst; snd < len && pb[snd] != ' ' && pb[snd] != '\t' && pb[snd] != '\n'; snd++)
-		; /* skip first arg */
-	giveupif(snd == len);
-	noarg = (pb[snd] == '\n');
-	pb[snd++] = '\0'; /* null terminate the first arg */
-	if (!noarg) {
-		while (snd < len && (pb[snd] == ' ' || pb[snd] == '\t'))
-			snd++; /* skip whitespace to second arg */
-		giveupif(snd == len);
-		noarg = (pb[snd] == '\n'); /* could have trailing whitespace after only one arg */
-		if (!noarg) {
-			for (end = snd; end < len && pb[end] != ' ' && pb[end] != '\t' && pb[end] != '\n'; end++)
-				; /* skip to the end of the second arg */
-			giveupif(end == len);
-			if (pb[end] == '\n') {
-				pb[end] = '\0'; /* null terminate the first arg */
-			} else {		/* else check for a spurious third arg */
-				pb[end++] = '\0';
-				while (end < len && (pb[end] == ' ' || pb[end] == '\t'))
-					end++;
-				giveupif(end == len || pb[end] != '\n');
-			}
-		}
-	}
-	*av = path;
-	if (!noarg)
-		*--av = pb + snd;
-	*--av = pb + fst;
-	execve(*av, av, ev);
-	return -1;
-fail:	errno = ENOEXEC;
-	return -1;
-}