diff options
Diffstat (limited to 'dialects/linux/dnode.c')
| -rw-r--r-- | dialects/linux/dnode.c | 194 |
1 files changed, 190 insertions, 4 deletions
diff --git a/dialects/linux/dnode.c b/dialects/linux/dnode.c index b2cd77e..ce80b5d 100644 --- a/dialects/linux/dnode.c +++ b/dialects/linux/dnode.c @@ -32,12 +32,16 @@ #ifndef lint static char copyright[] = "@(#) Copyright 1997 Purdue Research Foundation.\nAll rights reserved.\n"; -static char *rcsid = "$Id: dnode.c,v 1.25 2015/07/07 19:46:33 abe Exp $"; +static char *rcsid = "$Id: dnode.c,v 1.26 2018/02/14 14:26:38 abe Exp $"; #endif #include "lsof.h" +#if defined(HASEPTOPTS) && defined(HASPTYEPT) +#include <linux/major.h> +#endif /* defined(HASEPTOPTS) && defined(HASPTYEPT) */ + /* * Local definitions @@ -88,7 +92,11 @@ _PROTOTYPE(static void enter_pinfo,(void)); */ #if defined(HASEPTOPTS) -static pxinfo_t **Pinfo = (pxinfo_t **)NULL; +static pxinfo_t **Pinfo = (pxinfo_t **)NULL; /* pipe endpoint hash buckets */ +# if defined(HASPTYEPT) +static pxinfo_t **PtyInfo = (pxinfo_t **)NULL; /* pseudoterminal endpoint hash + * buckets */ +# endif /* defined(HASPTYEPT) */ #endif /* defined(HASEPTOPTS) */ @@ -202,12 +210,180 @@ enter_pinfo() } +#if defined(HASPTYEPT) + + +/* + * clear_ptyinfo() -- clear allocated pseudoterminal info + */ + +void +clear_ptyinfo() +{ + int h; /* hash index */ + pxinfo_t *pi, *pp; /* temporary pointers */ + + if (!PtyInfo) + return; + for (h = 0; h < PINFOBUCKS; h++) { + if ((pi = PtyInfo[h])) { + do { + pp = pi->next; + (void) free((FREE_P *)pi); + pi = pp; + } while (pi); + PtyInfo[h] = (pxinfo_t *)NULL; + } + } +} + + +/* + * enter_ptmxi() -- enter pty info + * + * entry Lf = local file structure pointer + * Lp = local process structure pointer + */ + +void +enter_ptmxi(mn) + int mn; /* minor number of device */ +{ + int h; /* hash result */ + struct lfile *lf; /* local file structure pointer */ + struct lproc *lp; /* local proc structure pointer */ + pxinfo_t *np, *pi, *pe; /* inode hash pointers */ + + if (!PtyInfo) { + + /* + * Allocate pipe info hash buckets (but used for pty). + */ + if (!(PtyInfo = (pxinfo_t **)calloc(PINFOBUCKS, + sizeof(pxinfo_t *)))) + { + (void) fprintf(stderr, + "%s: no space for %d pty info buckets\n", Pn, PINFOBUCKS); + Exit(1); + } + } + /* + * Make sure this is a unique entry. + */ + for (h = HASHPINFO(mn), pi = PtyInfo[h], pe = (pxinfo_t *)NULL; + pi; + pe = pi, pi = pi->next + ) { + lf = pi->lf; + lp = &Lproc[pi->lpx]; + if (pi->ino == mn) { + if ((lp->pid == Lp->pid) && !strcmp(lf->fd, Lf->fd)) + return; + } + } + /* + * Allocate, fill and link a new pipe info structure used for pty + * to the end of the pty device hash chain. + */ + if (!(np = (pxinfo_t *)malloc(sizeof(pxinfo_t)))) { + (void) fprintf(stderr, + "%s: no space for pipeinfo for pty, PID %d, FD %s\n", + Pn, Lp->pid, Lf->fd); + Exit(1); + } + np->ino = mn; + np->lf = Lf; + np->lpx = Lp - Lproc; + np->next = (pxinfo_t *)NULL; + if (pe) + pe->next = np; + else + PtyInfo[h] = np; +} + + +/* + * find_ptyepti() -- find pseudoterminal end point info + */ + +pxinfo_t * +find_ptyepti(lf, m, pp) + struct lfile *lf; /* pseudoterminal's lfile */ + int m; /* minor number type: + * 0 == use tty_index + * 1 == use minor device */ + pxinfo_t *pp; /* previous pseudoterminal info + * (NULL == none) */ +{ + struct lfile *ef; /* pseudoterminal end local file */ + int h; /* hash result */ + INODETYPE mn; /* minor number */ + pxinfo_t *pi; /* pseudoterminal info pointer */ + + + mn = m ? GET_MIN_DEV(lf->rdev) : lf->tty_index; + if (PtyInfo) { + if (pp) + pi = pp; + else { + h = HASHPINFO(mn); + pi = PtyInfo[h]; + } + while (pi) { + if (pi->ino == mn) { + ef = pi->lf; + if (((m && is_pty_ptmx(ef->rdev)) + || ((!m) && is_pty_slave(GET_MAJ_DEV(ef->rdev)))) + && strcmp(lf->fd, ef->fd) + ) { + return(pi); + } + } + pi = pi->next; + } + } + return((pxinfo_t *)NULL); +} + + /* - * find_pendinfo() -- find pipe end info + * is_pty_slave() -- is a pseudoterminal a slave device + */ + +int +is_pty_slave(sm) + int sm; /* slave major device number */ +{ + if ((UNIX98_PTY_SLAVE_MAJOR <= sm) + && (sm < (UNIX98_PTY_SLAVE_MAJOR + UNIX98_PTY_SLAVE_MAJOR)) + ) { + return 1; + } + return 0; +} + + +/* + * is_pty_ptmx() -- is a pseudoterminal a master clone device + */ + +int +is_pty_ptmx(dev) + dev_t dev; /* device number */ +{ + if ((GET_MAJ_DEV(dev) == TTYAUX_MAJOR) && (GET_MIN_DEV(dev) == 2)) + return 1; + return 0; +} +#endif /* defined(HASPTYEPT) */ + + +/* + * find_pepti() -- find pipe end point info */ pxinfo_t * -find_pendinfo(lf, pp) +find_pepti(lf, pp) struct lfile *lf; /* pipe's lfile */ pxinfo_t *pp; /* previous pipe info (NULL == none) */ { @@ -559,6 +735,16 @@ process_proc_node(p, pbr, s, ss, l, ls) if (ss & SB_RDEV) { Lf->rdev = s->st_rdev; Lf->rdev_def = 1; + +#if defined(HASEPTOPTS) && defined(HASPTYEPT) + if ((Ntype == N_CHR) + && is_pty_slave(GET_MAJ_DEV(Lf->rdev)) + ) { + enter_ptmxi(GET_MIN_DEV(Lf->rdev)); + Lf->sf |= SELPTYINFO; + } +#endif /* defined(HASEPTOPTS) && defined(HASPTYEPT) */ + } } if (Ntype == N_REGLR && (HasNFS == 2)) { |