patch-2.2.0-pre5 linux/scripts/ksymoops/misc.c

• Lines: 109
• Date: Tue Jan 5 11:13:56 1999
• Orig file: v2.2.0-pre4/linux/scripts/ksymoops/misc.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.2.0-pre4/linux/scripts/ksymoops/misc.c linux/scripts/ksymoops/misc.c
@@ -0,0 +1,108 @@
+/*
+	misc.c.
+
+	Miscellaneous routines for ksymoops.
+
+	Copyright Keith Owens <kaos@ocs.com.au>.
+	Released under the GNU Public Licence, Version 2.
+
+	Tue Nov  3 02:31:01 EST 1998
+	Version 0.6
+	Convert from a.out to bfd, using same format as ksymoops.
+
+	Wed Oct 28 13:47:23 EST 1998
+	Version 0.4
+	Split into separate sources.
+ */
+
+#include "ksymoops.h"
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+void malloc_error(const char *msg)
+{
+	fprintf(stderr, "%s: fatal malloc error for %s\n", prefix, msg);
+	exit(2);
+}
+
+/* Format an address with the correct number of leading zeroes */
+const char *format_address(elf_addr_t address)
+{
+	/* Well oversized */
+	static char format[10], text[200];
+	if (!*format)
+		snprintf(format, sizeof(format), "%%0%dlx",
+			2*sizeof(address));
+	snprintf(text, sizeof(text), format, address);
+	return(text);
+}
+
+/* Find the full pathname of a program.  Code heavily based on
+ * glibc-2.0.5/posix/execvp.c.
+ */
+char *find_fullpath(const char *program)
+{
+	char *fullpath = NULL;
+	char *path, *p;
+	size_t len;
+	static const char procname[] = "find_fullpath";
+
+	/* Don't search when it contains a slash.  */
+	if (strchr(program, '/')) {
+		if (!(fullpath = strdup(program)))
+			malloc_error(procname);
+		if (debug > 1)
+			fprintf(stderr, "DEBUG: %s %s\n", procname, fullpath);
+		return(fullpath);
+	}
+
+	path = getenv ("PATH");
+	if (!path) {
+		/* There is no `PATH' in the environment.  The default search
+		   path is the current directory followed by the path `confstr'
+		   returns for `_CS_PATH'.
+		 */
+		len = confstr(_CS_PATH, (char *) NULL, 0);
+		if (!(path = malloc(1 + len)))
+			malloc_error(procname);
+		path[0] = ':';
+		confstr(_CS_PATH, path+1, len);
+	}
+
+	len = strlen(program) + 1;
+	if (!(fullpath = malloc(strlen(path) + len)))
+		malloc_error(procname);
+	p = path;
+	do {
+		path = p;
+		p = strchr(path, ':');
+		if (p == NULL)
+			p = strchr(path, '\0');
+
+		/* Two adjacent colons, or a colon at the beginning or the end
+		 * of `PATH' means to search the current directory.
+		 */
+		if (p == path)
+			memcpy(fullpath, program, len);
+		else {
+			/* Construct the pathname to try.  */
+			memcpy(fullpath, path, p - path);
+			fullpath[p - path] = '/';
+			memcpy(&fullpath[(p - path) + 1], program, len);
+		}
+
+		/* If we have execute access, assume this is the program. */
+		if (access(fullpath, X_OK) == 0) {
+			if (debug > 1)
+				fprintf(stderr, "DEBUG: %s %s\n",
+					procname, fullpath);
+			return(fullpath);
+		}
+	} while (*p++ != '\0');
+
+	fprintf(stderr, "Error: %s %s could not find executable %s\n",
+		prefix, procname, program);
+	++errors;
+	return(NULL);
+}