kern_sig.c (7f49ce7a0b5f0d501d233308d73ccb1bf191a68b) kern_sig.c (9d3ecb7e625f92880c5c885b8114f3452dcabed9)
1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1982, 1986, 1989, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph

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924osigreturn(struct thread *td, struct osigreturn_args *uap)
925{
926
927 return (nosys(td, (struct nosys_args *)uap));
928}
929#endif
930#endif /* COMPAT_43 */
931
1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1982, 1986, 1989, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph

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924osigreturn(struct thread *td, struct osigreturn_args *uap)
925{
926
927 return (nosys(td, (struct nosys_args *)uap));
928}
929#endif
930#endif /* COMPAT_43 */
931
932/* Would this signal be fatal to the current process, if it were caught ? */
933bool
934sig_isfatal(struct proc *p, int sig)
935{
936 intptr_t act;
937 int prop;
938
939 mtx_assert(&p->p_sigacts->ps_mtx, MA_OWNED);
940 act = (intptr_t)p->p_sigacts->ps_sigact[_SIG_IDX(sig)];
941 if ((intptr_t)SIG_DFL == act) {
942 prop = sigprop(sig);
943 return (0 != (prop & (SIGPROP_KILL | SIGPROP_CORE)));
944 } else {
945 return (false);
946 }
947}
948
949/*
950 * Initialize signal state for process 0;
951 * set to ignore signals that are ignored by default.
952 */
953void
954siginit(struct proc *p)
955{
956 int i;

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3445 * %P process id (pid)
3446 * %U user id (uid)
3447 * For example, "%N.core" is the default; they can be disabled completely
3448 * by using "/dev/null", or all core files can be stored in "/cores/%U/%N-%P".
3449 * This is controlled by the sysctl variable kern.corefile (see above).
3450 */
3451static int
3452corefile_open(const char *comm, uid_t uid, pid_t pid, struct thread *td,
932/*
933 * Initialize signal state for process 0;
934 * set to ignore signals that are ignored by default.
935 */
936void
937siginit(struct proc *p)
938{
939 int i;

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3428 * %P process id (pid)
3429 * %U user id (uid)
3430 * For example, "%N.core" is the default; they can be disabled completely
3431 * by using "/dev/null", or all core files can be stored in "/cores/%U/%N-%P".
3432 * This is controlled by the sysctl variable kern.corefile (see above).
3433 */
3434static int
3435corefile_open(const char *comm, uid_t uid, pid_t pid, struct thread *td,
3453 int compress, struct vnode **vpp, char **namep)
3436 int compress, int signum, struct vnode **vpp, char **namep)
3454{
3455 struct sbuf sb;
3456 struct nameidata nd;
3457 const char *format;
3458 char *hostname, *name;
3459 int cmode, error, flags, i, indexpos, indexlen, oflags, ncores;
3460
3461 hostname = NULL;

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3494 indexlen = sbuf_len(&sb) - indexpos;
3495 break;
3496 case 'N': /* process name */
3497 sbuf_printf(&sb, "%s", comm);
3498 break;
3499 case 'P': /* process id */
3500 sbuf_printf(&sb, "%u", pid);
3501 break;
3437{
3438 struct sbuf sb;
3439 struct nameidata nd;
3440 const char *format;
3441 char *hostname, *name;
3442 int cmode, error, flags, i, indexpos, indexlen, oflags, ncores;
3443
3444 hostname = NULL;

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3477 indexlen = sbuf_len(&sb) - indexpos;
3478 break;
3479 case 'N': /* process name */
3480 sbuf_printf(&sb, "%s", comm);
3481 break;
3482 case 'P': /* process id */
3483 sbuf_printf(&sb, "%u", pid);
3484 break;
3485 case 'S': /* signal number */
3486 sbuf_printf(&sb, "%i", signum);
3487 break;
3502 case 'U': /* user id */
3503 sbuf_printf(&sb, "%u", uid);
3504 break;
3505 default:
3506 log(LOG_ERR,
3507 "Unknown format character %c in "
3508 "corename `%s'\n", format[i], format);
3509 break;

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3611 limit = (off_t)lim_cur(td, RLIMIT_CORE);
3612 if (limit == 0 || racct_get_available(p, RACCT_CORE) == 0) {
3613 PROC_UNLOCK(p);
3614 return (EFBIG);
3615 }
3616 PROC_UNLOCK(p);
3617
3618 error = corefile_open(p->p_comm, cred->cr_uid, p->p_pid, td,
3488 case 'U': /* user id */
3489 sbuf_printf(&sb, "%u", uid);
3490 break;
3491 default:
3492 log(LOG_ERR,
3493 "Unknown format character %c in "
3494 "corename `%s'\n", format[i], format);
3495 break;

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3597 limit = (off_t)lim_cur(td, RLIMIT_CORE);
3598 if (limit == 0 || racct_get_available(p, RACCT_CORE) == 0) {
3599 PROC_UNLOCK(p);
3600 return (EFBIG);
3601 }
3602 PROC_UNLOCK(p);
3603
3604 error = corefile_open(p->p_comm, cred->cr_uid, p->p_pid, td,
3619 compress_user_cores, &vp, &name);
3605 compress_user_cores, p->p_sig, &vp, &name);
3620 if (error != 0)
3621 return (error);
3622
3623 /*
3624 * Don't dump to non-regular files or files with links.
3625 * Do not dump into system files. Effective user must own the corefile.
3626 */
3627 if (vp->v_type != VREG || VOP_GETATTR(vp, &vattr, cred) != 0 ||

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3607 return (error);
3608
3609 /*
3610 * Don't dump to non-regular files or files with links.
3611 * Do not dump into system files. Effective user must own the corefile.
3612 */
3613 if (vp->v_type != VREG || VOP_GETATTR(vp, &vattr, cred) != 0 ||

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