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Don't try to read from a zero-length sudoers file. Remove the bogus

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Solaris work-around for EAGAIN.  Since we now use fgetc() it should
not be a problem.
This commit is contained in:
Todd C. Miller
2008-10-26 20:43:59 +00:00
parent ab32ede12a
commit aa54053ad1
1 changed files with 11 additions and 18 deletions
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29
sudo.c
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@@ -1030,7 +1030,7 @@ open_sudoers(sudoers, keepopen)
{
struct stat statbuf;
FILE *fp = NULL;
int rootstat, i;
int rootstat;
/*
* Fix the mode and group on sudoers file from old default.
@@ -1075,25 +1075,18 @@ open_sudoers(sudoers, keepopen)
else if (statbuf.st_gid != SUDOERS_GID)
log_error(NO_EXIT, "%s is owned by gid %lu, should be %lu", sudoers,
(unsigned long) statbuf.st_gid, (unsigned long) SUDOERS_GID);
else {
/* Solaris sometimes returns EAGAIN so try 10 times */
for (i = 0; i < 10 ; i++) {
errno = 0;
if ((fp = fopen(sudoers, "r")) == NULL || fgetc(fp) == EOF) {
if (fp != NULL)
fclose(fp);
fp = NULL;
if (errno != EAGAIN && errno != EWOULDBLOCK)
break;
} else
break;
sleep(1);
}
if (fp == NULL)
log_error(USE_ERRNO, "can't open %s", sudoers);
else if ((fp = fopen(sudoers, "r")) == NULL)
log_error(USE_ERRNO, "can't open %s", sudoers);
else if (statbuf.st_size != 0) {
/*
* Make sure we can actually read sudoers so we can present the
* user with a reasonable error message.
*/
if (fgetc(fp) == EOF)
log_error(USE_ERRNO, "can't read %s", sudoers);
rewind(fp);
(void) fcntl(fileno(fp), F_SETFD, 1);
}
(void) fcntl(fileno(fp), F_SETFD, 1);
set_perms(PERM_ROOT); /* change back to root */
return(fp);