| kern_sig.c (7b8d5e4865433d266be2782c5f188883c1a8b0eb) | kern_sig.c (33f19bee6fe93bbebb203968a7e7c4277218c8e1) |
|---|---|
| 1/*- 2 * Copyright (c) 1982, 1986, 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. --- 3048 unchanged lines hidden (view full) --- 3057 register struct ucred *cred = td->td_ucred; 3058 struct flock lf; 3059 struct nameidata nd; 3060 struct vattr vattr; 3061 int error, error1, flags, locked; 3062 struct mount *mp; 3063 char *name; /* name of corefile */ 3064 off_t limit; | 1/*- 2 * Copyright (c) 1982, 1986, 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. --- 3048 unchanged lines hidden (view full) --- 3057 register struct ucred *cred = td->td_ucred; 3058 struct flock lf; 3059 struct nameidata nd; 3060 struct vattr vattr; 3061 int error, error1, flags, locked; 3062 struct mount *mp; 3063 char *name; /* name of corefile */ 3064 off_t limit; |
| 3065 int vfslocked; |
|
| 3065 3066 PROC_LOCK_ASSERT(p, MA_OWNED); 3067 MPASS((p->p_flag & P_HADTHREADS) == 0 || p->p_singlethread == td); 3068 _STOPEVENT(p, S_CORE, 0); 3069 3070 if (((sugid_coredump == 0) && p->p_flag & P_SUGID) || do_coredump == 0) { 3071 PROC_UNLOCK(p); 3072 return (EFAULT); --- 7 unchanged lines hidden (view full) --- 3080 * a corefile is truncated instead of not being created, 3081 * if it is larger than the limit. 3082 */ 3083 limit = (off_t)lim_cur(p, RLIMIT_CORE); 3084 PROC_UNLOCK(p); 3085 if (limit == 0) 3086 return (EFBIG); 3087 | 3066 3067 PROC_LOCK_ASSERT(p, MA_OWNED); 3068 MPASS((p->p_flag & P_HADTHREADS) == 0 || p->p_singlethread == td); 3069 _STOPEVENT(p, S_CORE, 0); 3070 3071 if (((sugid_coredump == 0) && p->p_flag & P_SUGID) || do_coredump == 0) { 3072 PROC_UNLOCK(p); 3073 return (EFAULT); --- 7 unchanged lines hidden (view full) --- 3081 * a corefile is truncated instead of not being created, 3082 * if it is larger than the limit. 3083 */ 3084 limit = (off_t)lim_cur(p, RLIMIT_CORE); 3085 PROC_UNLOCK(p); 3086 if (limit == 0) 3087 return (EFBIG); 3088 |
| 3088 mtx_lock(&Giant); | |
| 3089restart: 3090 name = expand_name(p->p_comm, td->td_ucred->cr_uid, p->p_pid); | 3089restart: 3090 name = expand_name(p->p_comm, td->td_ucred->cr_uid, p->p_pid); |
| 3091 if (name == NULL) { 3092 mtx_unlock(&Giant); | 3091 if (name == NULL) |
| 3093 return (EINVAL); | 3092 return (EINVAL); |
| 3094 } 3095 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, name, td); /* XXXKSE */ | 3093 NDINIT(&nd, LOOKUP, NOFOLLOW | MPSAFE, UIO_SYSSPACE, name, td); |
| 3096 flags = O_CREAT | FWRITE | O_NOFOLLOW; 3097 error = vn_open(&nd, &flags, S_IRUSR | S_IWUSR, -1); 3098 free(name, M_TEMP); | 3094 flags = O_CREAT | FWRITE | O_NOFOLLOW; 3095 error = vn_open(&nd, &flags, S_IRUSR | S_IWUSR, -1); 3096 free(name, M_TEMP); |
| 3099 if (error) { 3100 mtx_unlock(&Giant); | 3097 if (error) |
| 3101 return (error); | 3098 return (error); |
| 3102 } | 3099 vfslocked = NDHASGIANT(&nd); |
| 3103 NDFREE(&nd, NDF_ONLY_PNBUF); 3104 vp = nd.ni_vp; 3105 3106 /* Don't dump to non-regular files or files with links. */ 3107 if (vp->v_type != VREG || 3108 VOP_GETATTR(vp, &vattr, cred, td) || vattr.va_nlink != 1) { 3109 VOP_UNLOCK(vp, 0, td); 3110 error = EFAULT; | 3100 NDFREE(&nd, NDF_ONLY_PNBUF); 3101 vp = nd.ni_vp; 3102 3103 /* Don't dump to non-regular files or files with links. */ 3104 if (vp->v_type != VREG || 3105 VOP_GETATTR(vp, &vattr, cred, td) || vattr.va_nlink != 1) { 3106 VOP_UNLOCK(vp, 0, td); 3107 error = EFAULT; |
| 3111 goto out; | 3108 goto close; |
| 3112 } 3113 3114 VOP_UNLOCK(vp, 0, td); 3115 lf.l_whence = SEEK_SET; 3116 lf.l_start = 0; 3117 lf.l_len = 0; 3118 lf.l_type = F_WRLCK; 3119 locked = (VOP_ADVLOCK(vp, (caddr_t)p, F_SETLK, &lf, F_FLOCK) == 0); 3120 3121 if (vn_start_write(vp, &mp, V_NOWAIT) != 0) { 3122 lf.l_type = F_UNLCK; 3123 if (locked) 3124 VOP_ADVLOCK(vp, (caddr_t)p, F_UNLCK, &lf, F_FLOCK); 3125 if ((error = vn_close(vp, FWRITE, cred, td)) != 0) | 3109 } 3110 3111 VOP_UNLOCK(vp, 0, td); 3112 lf.l_whence = SEEK_SET; 3113 lf.l_start = 0; 3114 lf.l_len = 0; 3115 lf.l_type = F_WRLCK; 3116 locked = (VOP_ADVLOCK(vp, (caddr_t)p, F_SETLK, &lf, F_FLOCK) == 0); 3117 3118 if (vn_start_write(vp, &mp, V_NOWAIT) != 0) { 3119 lf.l_type = F_UNLCK; 3120 if (locked) 3121 VOP_ADVLOCK(vp, (caddr_t)p, F_UNLCK, &lf, F_FLOCK); 3122 if ((error = vn_close(vp, FWRITE, cred, td)) != 0) |
| 3126 return (error); | 3123 goto out; |
| 3127 if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0) | 3124 if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0) |
| 3128 return (error); | 3125 goto out; 3126 VFS_UNLOCK_GIANT(vfslocked); |
| 3129 goto restart; 3130 } 3131 3132 VATTR_NULL(&vattr); 3133 vattr.va_size = 0; 3134 if (set_core_nodump_flag) 3135 vattr.va_flags = UF_NODUMP; 3136 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); --- 8 unchanged lines hidden (view full) --- 3145 p->p_sysent->sv_coredump(td, vp, limit) : 3146 ENOSYS; 3147 3148 if (locked) { 3149 lf.l_type = F_UNLCK; 3150 VOP_ADVLOCK(vp, (caddr_t)p, F_UNLCK, &lf, F_FLOCK); 3151 } 3152 vn_finished_write(mp); | 3127 goto restart; 3128 } 3129 3130 VATTR_NULL(&vattr); 3131 vattr.va_size = 0; 3132 if (set_core_nodump_flag) 3133 vattr.va_flags = UF_NODUMP; 3134 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); --- 8 unchanged lines hidden (view full) --- 3143 p->p_sysent->sv_coredump(td, vp, limit) : 3144 ENOSYS; 3145 3146 if (locked) { 3147 lf.l_type = F_UNLCK; 3148 VOP_ADVLOCK(vp, (caddr_t)p, F_UNLCK, &lf, F_FLOCK); 3149 } 3150 vn_finished_write(mp); |
| 3153out: | 3151close: |
| 3154 error1 = vn_close(vp, FWRITE, cred, td); | 3152 error1 = vn_close(vp, FWRITE, cred, td); |
| 3155 mtx_unlock(&Giant); | |
| 3156 if (error == 0) 3157 error = error1; | 3153 if (error == 0) 3154 error = error1; |
| 3155out: 3156 VFS_UNLOCK_GIANT(vfslocked); |
|
| 3158 return (error); 3159} 3160 3161/* 3162 * Nonexistent system call-- signal process (may want to handle it). 3163 * Flag error in case process won't see signal immediately (blocked or ignored). 3164 */ 3165#ifndef _SYS_SYSPROTO_H_ --- 152 unchanged lines hidden --- | 3157 return (error); 3158} 3159 3160/* 3161 * Nonexistent system call-- signal process (may want to handle it). 3162 * Flag error in case process won't see signal immediately (blocked or ignored). 3163 */ 3164#ifndef _SYS_SYSPROTO_H_ --- 152 unchanged lines hidden --- |