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Added fchmod() and fchown()

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This commit is contained in:
Ben Gras
2006-04-18 11:26:04 +00:00
parent b1e5779b1c
commit 461a4fafb1
14 changed files with 83 additions and 15 deletions
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34
servers/fs/protect.c
View File

@@ -2,8 +2,8 @@
* for four system calls that relate to protection.
*
* The entry points into this file are
* do_chmod: perform the CHMOD system call
* do_chown: perform the CHOWN system call
* do_chmod: perform the CHMOD and FCHMOD system calls
* do_chown: perform the CHOWN and FCHOWN system calls
* do_umask: perform the UMASK system call
* do_access: perform the ACCESS system call
* forbidden: check to see if a given access is allowed on a given inode
@@ -29,9 +29,15 @@ PUBLIC int do_chmod()
register struct inode *rip;
register int r;
/* Temporarily open the file. */
if (fetch_name(m_in.name, m_in.name_length, M3) != OK) return(err_code);
if ( (rip = eat_path(user_path)) == NIL_INODE) return(err_code);
if(call_nr == CHMOD) {
/* Temporarily open the file. */
if (fetch_name(m_in.name, m_in.name_length, M3) != OK) return(err_code);
if ( (rip = eat_path(user_path)) == NIL_INODE) return(err_code);
} else if(call_nr == FCHMOD) {
struct filp *filp;
if(!(filp = get_filp(m_in.m3_i1))) return(err_code);
rip = filp->filp_ino;
} else panic(__FILE__, "do_chmod called with strange call_nr", call_nr);
/* Only the owner or the super_user may change the mode of a file.
* No one may change the mode of a file on a read-only file system.
@@ -43,7 +49,7 @@ PUBLIC int do_chmod()
/* If error, return inode. */
if (r != OK) {
put_inode(rip);
if(call_nr == CHMOD) put_inode(rip);
return(r);
}
@@ -53,7 +59,7 @@ PUBLIC int do_chmod()
rip->i_update |= CTIME;
rip->i_dirt = DIRTY;
put_inode(rip);
if(call_nr == CHMOD) put_inode(rip);
return(OK);
}
@@ -67,9 +73,15 @@ PUBLIC int do_chown()
register struct inode *rip;
register int r;
/* Temporarily open the file. */
if (fetch_name(m_in.name1, m_in.name1_length, M1) != OK) return(err_code);
if ( (rip = eat_path(user_path)) == NIL_INODE) return(err_code);
if(call_nr == CHOWN) {
/* Temporarily open the file. */
if (fetch_name(m_in.name1, m_in.name1_length, M1) != OK) return(err_code);
if ( (rip = eat_path(user_path)) == NIL_INODE) return(err_code);
} else if(call_nr == FCHOWN) {
struct filp *filp;
if(!(filp = get_filp(m_in.m1_i1))) return(err_code);
rip = filp->filp_ino;
} else panic(__FILE__, "do_chown called with strange call_nr", call_nr);
/* Not permitted to change the owner of a file on a read-only file sys. */
r = read_only(rip);
@@ -92,7 +104,7 @@ PUBLIC int do_chown()
rip->i_dirt = DIRTY;
}
put_inode(rip);
if(call_nr == CHOWN) put_inode(rip);
return(r);
}

2
servers/fs/table.c
View File

@@ -112,6 +112,8 @@ PUBLIC _PROTOTYPE (int (*call_vec[]), (void) ) = {
no_sys, /* 92 = setegid */
do_truncate, /* 93 = truncate */
do_ftruncate, /* 94 = truncate */
do_chmod, /* 95 = fchmod */
do_chown, /* 96 = fchown */
};
/* This should not fail with "array size is negative": */
extern int dummy[sizeof(call_vec) == NCALLS * sizeof(call_vec[0]) ? 1 : -1];

2
servers/pm/table.c
View File

@@ -110,6 +110,8 @@ _PROTOTYPE (int (*call_vec[NCALLS]), (void) ) = {
do_getset, /* 92 = setegid */
no_sys, /* 93 = truncate */
no_sys, /* 94 = ftruncate */
no_sys, /* 95 = fchmod */
no_sys, /* 96 = fchown */
};
/* This should not fail with "array size is negative": */
extern int dummy[sizeof(call_vec) == NCALLS * sizeof(call_vec[0]) ? 1 : -1];