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authorDenis Vlasenko2007-07-27 11:20:10 +0000
committerDenis Vlasenko2007-07-27 11:20:10 +0000
commit3734b946bfef55c8f63d367422da5c7aa7b972db (patch)
tree1bdd3e14523002dc8276d167b17f900e40fa6dff /libbb/bb_pwd.c
parent661f6fad77b672a5f6648b01275eb9ff19c59139 (diff)
downloadbusybox-3734b946bfef55c8f63d367422da5c7aa7b972db.zip
busybox-3734b946bfef55c8f63d367422da5c7aa7b972db.tar.gz
bb_getpwuid, bb_getgrgid: change order of arguments to more intuitive one;
comment thoroughly when they die and when they dont.
Diffstat (limited to 'libbb/bb_pwd.c')
-rw-r--r--libbb/bb_pwd.c90
1 files changed, 30 insertions, 60 deletions
diff --git a/libbb/bb_pwd.c b/libbb/bb_pwd.c
index 3af1994..2bdb662 100644
--- a/libbb/bb_pwd.c
+++ b/libbb/bb_pwd.c
@@ -11,22 +11,20 @@
#define assert(x) ((void)0)
-/*
- * if bufsize is > 0 char *buffer cannot be set to NULL.
- * If idname is not NULL it is written on the static
- * allocated buffer (and a pointer to it is returned).
- * if idname is NULL, id as string is written to the static
- * allocated buffer and NULL is returned.
- * if bufsize is = 0 char *buffer can be set to NULL.
- * If idname exists a pointer to it is returned,
- * else NULL is returned.
- * if bufsize is < 0 char *buffer can be set to NULL.
- * If idname exists a pointer to it is returned,
- * else an error message is printed and the program exits.
- */
-
/* internal function for bb_getpwuid and bb_getgrgid */
-static char* bb_getug(char *buffer, char *idname, long id, int bufsize, char prefix)
+/* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
+ * flexible:
+ *
+ * bufsize > 0: If idname is not NULL it is copied to buffer,
+ * and buffer is returned. Else id as string is written
+ * to buffer, and NULL is returned.
+ *
+ * bufsize == 0: idname is returned.
+ *
+ * bufsize < 0: If idname is not NULL it is returned.
+ * Else an error message is printed and the program exits.
+ */
+static char* bb_getug(char *buffer, int bufsize, char *idname, long id, char prefix)
{
if (bufsize > 0) {
assert(buffer != NULL);
@@ -40,31 +38,29 @@ static char* bb_getug(char *buffer, char *idname, long id, int bufsize, char pre
return idname;
}
-/* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
- * flexible :
- *
- * if bufsize is > 0 char *group cannot be set to NULL.
- * On success groupname is written on static allocated buffer
- * group (and a pointer to it is returned).
- * On failure gid as string is written to static allocated
- * buffer group and NULL is returned.
- * if bufsize is = 0 char *group can be set to NULL.
- * On success groupname is returned.
- * On failure NULL is returned.
- * if bufsize is < 0 char *group can be set to NULL.
- * On success groupname is returned.
- * On failure an error message is printed and
- * the program exits.
+/* bb_getpwuid, bb_getgrgid:
+ * bb_getXXXid(buf, bufsz, id) - copy user/group name or id
+ * as a string to buf, return user/group name or NULL
+ * bb_getXXXid(NULL, 0, id) - return user/group name or NULL
+ * bb_getXXXid(NULL, -1, id) - return user/group name or exit
*/
+/* gets a username given a uid */
+char* bb_getpwuid(char *name, int bufsize, long uid)
+{
+ struct passwd *myuser = getpwuid(uid);
+ return bb_getug(name, bufsize,
+ (myuser ? myuser->pw_name : (char*)myuser),
+ uid, 'u');
+}
/* gets a groupname given a gid */
-char* bb_getgrgid(char *group, long gid, int bufsize)
+char* bb_getgrgid(char *group, int bufsize, long gid)
{
struct group *mygroup = getgrgid(gid);
- return bb_getug(group,
- mygroup ? mygroup->gr_name : (char *)mygroup,
- gid, bufsize, 'g');
+ return bb_getug(group, bufsize,
+ (mygroup ? mygroup->gr_name : (char*)mygroup),
+ gid, 'g');
}
/* returns a gid given a group name */
@@ -91,32 +87,6 @@ long xuname2uid(const char *name)
return myuser->pw_uid;
}
-/* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more
- * flexible :
- *
- * if bufsize is > 0 char *name cannot be set to NULL.
- * On success username is written on the static allocated
- * buffer name (and a pointer to it is returned).
- * On failure uid as string is written to the static
- * allocated buffer name and NULL is returned.
- * if bufsize is = 0 char *name can be set to NULL.
- * On success username is returned.
- * On failure NULL is returned.
- * if bufsize is < 0 char *name can be set to NULL
- * On success username is returned.
- * On failure an error message is printed and
- * the program exits.
- */
-
-/* gets a username given a uid */
-char* bb_getpwuid(char *name, long uid, int bufsize)
-{
- struct passwd *myuser = getpwuid(uid);
-
- return bb_getug(name, myuser ? myuser->pw_name : (char *)myuser,
- uid, bufsize, 'u');
-}
-
unsigned long get_ug_id(const char *s,
long (*xname2id)(const char *))
{