cdash@mumm.colorado.edu (Charles Shub) (02/20/91)
Have I found a bug in re_cmp and re_exec? If so, is there a fix??
if not, what am I doing wrong
please respond by mail as I do not subscribe to this group.
The problem seems to be in matching files with an input of <letter>*
I get a random match in this case.
charlie shub cdash@boulder.Colorado.EDU -or- ..!{ucar|nbires}!boulder!cdash
or even cdash@colospgs (BITNET) -or- (719) 593-3492
Execution output
------------------------------
bug m*
enter a string >u*
'u*' 'u.*' 'moutgoing' found 1
------------------------------
^ ^ ^
| | ------- file matched by re_exec
| -------------- string fed to re_comp
------------------- input string
The directory has 42 entries including the following:
bulgren
csu
moutgoing
upe
Source code below (culled from huge program, recompiled, and run)
it is running on a microvax with 4.3 + nfs
------------------------------
#include <pwd.h>
#include <sys/types.h>
#include <strings.h>
#include <sys/dir.h>
main()
{
DIR *dirp;
struct direct *dp;
char com[256], lstr[256];
char *re_comp(), *ap, *lp;
int found = 0;
printf("enter a string >");
gets(com);
ap = com;
lp = lstr;
while (*ap) {
if(*ap == '*') {
*lp++ = '.';
*lp++ = *ap++;
}
else {
*lp++ = *ap++;
}
}
*lp = '\0';
printf("'%s' '%s' ",com, lstr);
if(ap = re_comp(lstr)) {
printf("'%s' error %s",lp,ap);
}
else {
int zz;
dirp = opendir(".");
while ((dp = readdir(dirp)) != NULL && !found) {
if((zz = re_exec(dp->d_name)) < 0) {
printf("re_exec error");
break;
}
else if (zz) {
found = 1;
printf(" '%s' ",dp->d_name);
}
}
closedir(dirp);
}
printf(" found %d\n",found);
}
------------------------------
--
charlie shub cdash@boulder.Colorado.EDU -or- ..!{ucar|nbires}!boulder!cdash
or even cdash@colospgs (BITNET) -or- (719) 593-3492