[PATCH V3] xfsprogs: xfs_quota allow user or group names beginning with

[rjohnston@xxxxxxx]

xfs_quota does not properly parse users or groups that begin with a number.
Only call atoi when user or group consists of digits only.

Signed-off-by: Rich Johnston <rjohnston@xxxxxxx>
Reviewed-by: Eric Sandeen <sandeen@xxxxxxxxxx>

---

Fresh clone of xfsprogs showed I missed a change in quota_proj_type()
(Thanks Chandra pointing that out)

V2:
        Change 'i=0' to 'i = 0' (sandeen suggestion) 
        Use bool instead of boolean_t (dchinner suggestion)
V3:
        Also change quota_proj_type() to use isdigits_only() (sekharan 
suggestion)

 include/input.h |    2 ++
 libxcmd/input.c |   13 +++++++++++++
 quota/quota.c   |    6 +++---
 quota/quota.h   |    2 ++
 4 files changed, 20 insertions(+), 3 deletions(-)

Index: b/include/input.h
===================================================================
--- a/include/input.h
+++ b/include/input.h
@@ -22,6 +22,7 @@
 #include <grp.h>
 #include <sys/types.h>
 #include <xfs/project.h>
+#include <stdbool.h>
 
 extern char    **breakline(char *input, int *count);
 extern void    doneline(char *input, char **vec);
@@ -46,6 +47,7 @@ extern void   timestr(struct timeval *tv,
 extern uid_t   uid_from_string(char *user);
 extern gid_t   gid_from_string(char *group);
 extern prid_t  prid_from_string(char *project);
+extern bool    isdigits_only(const char *str);
 
 #define HAVE_FTW_H 1   /* TODO: configure me */
 
Index: b/libxcmd/input.c
===================================================================
--- a/libxcmd/input.c
+++ b/libxcmd/input.c
@@ -19,6 +19,7 @@
 #include <xfs/xfs.h>
 #include <xfs/input.h>
 #include <ctype.h>
+#include <stdbool.h>
 
 #if defined(ENABLE_READLINE)
 # include <readline/history.h>
@@ -398,6 +399,18 @@ gid_from_string(
        return -1;
 }
 
+bool isdigits_only(
+       const char *str)
+{
+       int i;
+
+       for (i = 0; i < strlen(str); i++) {
+               if (!isdigit(str[i]))
+                       return false;
+       }
+       return true;
+}
+
 #define HAVE_FTW_H 1   /* TODO: configure me */
 
 #ifndef HAVE_FTW_H
Index: b/quota/quota.c
===================================================================
--- a/quota/quota.c
+++ b/quota/quota.c
@@ -224,7 +224,7 @@ quota_user_type(
        uid_t           id;
 
        if (name) {
-               if (isdigit(name[0])) {
+               if (isdigits_only(name)) {
                        id = atoi(name);
                        name = getusername(id, flags & NO_LOOKUP_FLAG);
                } else if ((u = getpwnam(name))) {
@@ -273,7 +273,7 @@ quota_group_type(
        int             i, ngroups, dofree = 0;
 
        if (name) {
-               if (isdigit(name[0])) {
+               if (isdigits_only(name)) {
                        gid = atoi(name);
                        name = getgroupname(gid, flags & NO_LOOKUP_FLAG);
                } else {
@@ -344,7 +344,7 @@ quota_proj_type(
                return;
        }
 
-       if (isdigit(name[0])) {
+       if (isdigits_only(name)) {
                id = atoi(name);
                name = getprojectname(id, flags & NO_LOOKUP_FLAG);
        } else if ((p = getprnam(name))) {
Index: b/quota/quota.h
===================================================================
--- a/quota/quota.h
+++ b/quota/quota.h
@@ -19,6 +19,7 @@
 #include <xfs/xqm.h>
 #include <xfs/path.h>
 #include <xfs/project.h>
+#include <stdbool.h>
 
 /*
  * Different forms of XFS quota
@@ -80,4 +81,5 @@ enum {
 extern char *uid_to_name(__uint32_t __uid);
 extern char *gid_to_name(__uint32_t __gid);
 extern char *prid_to_name(__uint32_t __prid);
+extern bool isdigits_only(const char *);