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add -U option to groupadd and groupmod

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Add a -U option which adds new usernames as members.  For groupmod,
also add -a (append), without which existing members are removed.

Closes #265
This commit is contained in:
Serge Hallyn
2020-08-09 16:44:30 -05:00
parent 7ea342579e
commit 342c934a35
6 changed files with 147 additions and 10 deletions
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49
lib/groupmem.c
View File

@@ -87,6 +87,18 @@
return gr;
}
void gr_free_members (struct group *grent)
{
if (NULL != grent->gr_mem) {
size_t i;
for (i = 0; NULL != grent->gr_mem[i]; i++) {
free (grent->gr_mem[i]);
}
free (grent->gr_mem);
grent->gr_mem = NULL;
}
}
void gr_free (/*@out@*/ /*@only@*/struct group *grent)
{
free (grent->gr_name);
@@ -94,13 +106,36 @@ void gr_free (/*@out@*/ /*@only@*/struct group *grent)
memzero (grent->gr_passwd, strlen (grent->gr_passwd));
free (grent->gr_passwd);
}
if (NULL != grent->gr_mem) {
size_t i;
for (i = 0; NULL != grent->gr_mem[i]; i++) {
free (grent->gr_mem[i]);
}
free (grent->gr_mem);
}
gr_free_members(grent);
free (grent);
}
bool gr_append_member(struct group *grp, char *member)
{
int i;
if (NULL == grp->gr_mem || grp->gr_mem[0] == NULL) {
grp->gr_mem = (char **)malloc(2 * sizeof(char *));
if (!grp->gr_mem) {
return false;
}
grp->gr_mem[0] = strdup(member);
if (!grp->gr_mem[0]) {
return false;
}
grp->gr_mem[1] = NULL;
return true;
}
for (i = 0; grp->gr_mem[i]; i++) ;
grp->gr_mem = realloc(grp->gr_mem, (i + 2) * sizeof(char *));
if (NULL == grp->gr_mem) {
return false;
}
grp->gr_mem[i] = strdup(member);
if (NULL == grp->gr_mem[i]) {
return false;
}
grp->gr_mem[i + 1] = NULL;
return true;
}

2
lib/prototypes.h
View File

@@ -206,7 +206,9 @@ extern void __gr_set_changed (void);
/* groupmem.c */
extern /*@null@*/ /*@only@*/struct group *__gr_dup (const struct group *grent);
extern void gr_free_members (struct group *grent);
extern void gr_free (/*@out@*/ /*@only@*/struct group *grent);
extern bool gr_append_member (struct group *grp, char *member);
/* hushed.c */
extern bool hushed (const char *username);