src/common/fixargv0.c

#ifndef lint
static const char       RCSid[] = "$Id: fixargv0.c,v 2.5 2003/10/27 10:19:31 schorsch Exp $";
#endif
/*
 * Fix argv[0] for DOS environments
 *
 *  External symbols declared in paths.h
 */

#include "copyright.h"

#include <ctype.h>
#include <string.h>

extern char *
fixargv0(av0)                   /* extract command name from full path */
char  *av0;
{
        register char  *cp = av0;

        while (*cp) cp++;               /* start from end */
        while (cp-- > av0)
                switch (*cp) {          /* fix up command name */
                case '.':                       /* remove extension */
                        *cp = '\0';
                        continue;
                case '\\':                      /* remove directory */
                        strcpy(av0, cp+1);
                        break;
                default:                        /* convert to lower case */
                        *cp = tolower(*cp);
                        continue;
                }
        return(av0);
}


Revision:	2.6
Committed:	Sat Mar 19 00:44:46 2016 UTC (8 years, 1 month ago) by schorsch
Content type:	text/plain
Branch:	MAIN
Changes since 2.5:	+4 -2 lines
Log Message:	When argv is dynamically allocated, changing the pointer values crashes deallocation (yes, I'm doing weird things).
#	User	Rev	Content
1	greg	2.1	#ifndef lint
2	schorsch	2.6	static const char RCSid[] = "$Id: fixargv0.c,v 2.5 2003/10/27 10:19:31 schorsch Exp $";
3	greg	2.1	#endif
4			/*
5			* Fix argv[0] for DOS environments
6	greg	2.2	*
7	schorsch	2.4	* External symbols declared in paths.h
8	greg	2.2	*/
9
10	greg	2.3	#include "copyright.h"
11	greg	2.1
12	schorsch	2.4	#include <ctype.h>
13	schorsch	2.6	#include <string.h>
14	greg	2.1
15	schorsch	2.5	extern char *
16	greg	2.1	fixargv0(av0) /* extract command name from full path */
17			char *av0;
18			{
19			register char *cp = av0;
20
21			while (cp) cp++; / start from end */
22			while (cp-- > av0)
23			switch (cp) { / fix up command name */
24			case '.': /* remove extension */
25			*cp = '\0';
26			continue;
27			case '\\': /* remove directory */
28	schorsch	2.6	strcpy(av0, cp+1);
29			break;
30	greg	2.1	default: /* convert to lower case */
31			cp = tolower(cp);
32			continue;
33			}
34			return(av0);
35			}
36
37