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Use a dynamically grown buffer for building the argv for the sub-mounts.

Browse source 
Also fix RCSid spamage.

Inspired by patch from:	Christoph Mallon <christoph.mallon@gmx.de>
This commit is contained in:
David E. O'Brien 2009-01-12 08:22:36 +00:00
parent d65e5ff8d1
commit 0035611858
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=187093
1 changed files with 16 additions and 11 deletions
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27
sbin/mount/mount.c
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@ -31,16 +31,14 @@
static const char copyright[] =
"@(#) Copyright (c) 1980, 1989, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/stat.h>
@ -70,10 +68,8 @@ static const char rcsid[] =
int debug, fstab_style, verbose;
#define MAX_ARGS 100
struct cpa {
char *a[MAX_ARGS];
ssize_t m;
char **a;
int c;
};
@ -507,9 +503,14 @@ hasopt(const char *mntopts, const char *option)
static void
append_arg(struct cpa *sa, char *arg)
{
if (sa->c >= sa->m)
errx(1, "Cannot process more than %zd mount arguments", sa->m);
static int a_sz;
if (sa->c + 1 == a_sz) {
a_sz = a_sz == 0 ? 8 : a_sz * 2;
sa->a = realloc(sa->a, sizeof(sa->a) * a_sz);
if (sa->a == NULL)
errx(1, "realloc failed");
}
sa->a[++sa->c] = arg;
}
@ -521,6 +522,7 @@ mountfs(const char *vfstype, const char *spec, const char *name, int flags,
struct statfs sf;
int i, ret;
char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX];
static int mnt_argv_inited;
/* resolve the mountpoint with realpath(3) */
(void)checkpath(name, mntpath);
@ -555,7 +557,10 @@ mountfs(const char *vfstype, const char *spec, const char *name, int flags,
/* Construct the name of the appropriate mount command */
(void)snprintf(execname, sizeof(execname), "mount_%s", vfstype);
mnt_argv.m = MAX_ARGS;
if (!mnt_argv_inited) {
mnt_argv_inited++;
mnt_argv.a = NULL;
}
mnt_argv.c = -1;
append_arg(&mnt_argv, execname);
mangle(optbuf, &mnt_argv);