Return to pipe.c CVS log

Up to [local] / src / usr.bin / aucat

Annotation of src/usr.bin/aucat/pipe.c, Revision 1.2

1.1       ratchov     1: #include <sys/time.h>
                      2: #include <sys/types.h>
                      3: #include <err.h>
                      4: #include <errno.h>
                      5: #include <fcntl.h>
                      6: #include <poll.h>
                      7: #include <stdio.h>
                      8: #include <stdlib.h>
                      9: #include <unistd.h>
                     10:
                     11: #include "conf.h"
                     12: #include "pipe.h"
                     13:
                     14: struct fileops pipe_ops = {
                     15:        "pipe",
                     16:        sizeof(struct pipe),
                     17:        pipe_close,
                     18:        pipe_read,
                     19:        pipe_write,
                     20:        NULL, /* start */
                     21:        NULL, /* stop */
                     22:        pipe_nfds,
                     23:        pipe_pollfd,
                     24:        pipe_revents
                     25: };
                     26:
                     27: struct pipe *
                     28: pipe_new(struct fileops *ops, int fd, char *name)
                     29: {
                     30:        struct pipe *f;
                     31:
                     32:        f = (struct pipe *)file_new(ops, name, 1);
                     33:        f->fd = fd;
                     34:        return f;
                     35: }
                     36:
                     37: unsigned
                     38: pipe_read(struct file *file, unsigned char *data, unsigned count)
                     39: {
                     40:        struct pipe *f = (struct pipe *)file;
                     41:        int n;
                     42: #ifdef DEBUG
                     43:        struct timeval tv0, tv1, dtv;
                     44:        unsigned us;
                     45:
                     46:        if (!(f->file.state & FILE_ROK)) {
                     47:                DPRINTF("pipe_read: %s: bad state\n", f->file.name);
                     48:                abort();
                     49:        }
                     50:        gettimeofday(&tv0, NULL);
                     51: #endif
                     52:        while ((n = read(f->fd, data, count)) < 0) {
                     53:                f->file.state &= ~FILE_ROK;
                     54:                if (errno == EAGAIN) {
                     55:                        DPRINTFN(3, "pipe_read: %s: blocking...\n",
                     56:                            f->file.name);
                     57:                } else {
                     58:                        warn("%s", f->file.name);
                     59:                        file_eof(&f->file);
                     60:                }
                     61:                return 0;
                     62:        }
                     63:        if (n == 0) {
                     64:                DPRINTFN(2, "pipe_read: %s: eof\n", f->file.name);
                     65:                f->file.state &= ~FILE_ROK;
                     66:                file_eof(&f->file);
                     67:                return 0;
                     68:        }
                     69: #ifdef DEBUG
                     70:        gettimeofday(&tv1, NULL);
                     71:        timersub(&tv1, &tv0, &dtv);
                     72:        us = dtv.tv_sec * 1000000 + dtv.tv_usec;
                     73:        DPRINTFN(us < 5000 ? 4 : 1,
                     74:            "pipe_read: %s: got %d bytes in %uus\n",
                     75:            f->file.name, n, us);
                     76: #endif
                     77:        return n;
                     78: }
                     79:
                     80:
                     81: unsigned
                     82: pipe_write(struct file *file, unsigned char *data, unsigned count)
                     83: {
                     84:        struct pipe *f = (struct pipe *)file;
                     85:        int n;
                     86: #ifdef DEBUG
                     87:        struct timeval tv0, tv1, dtv;
                     88:        unsigned us;
                     89:
                     90:        if (!(f->file.state & FILE_WOK)) {
                     91:                DPRINTF("pipe_write: %s: bad state\n", f->file.name);
                     92:                abort();
                     93:        }
                     94:        gettimeofday(&tv0, NULL);
                     95: #endif
                     96:        while ((n = write(f->fd, data, count)) < 0) {
                     97:                f->file.state &= ~FILE_WOK;
                     98:                if (errno == EAGAIN) {
                     99:                        DPRINTFN(3, "pipe_write: %s: blocking...\n",
                    100:                            f->file.name);
                    101:                } else {
                    102:                        if (errno != EPIPE)
                    103:                                warn("%s", f->file.name);
                    104:                        file_hup(&f->file);
                    105:                }
                    106:                return 0;
                    107:        }
                    108: #ifdef DEBUG
                    109:        gettimeofday(&tv1, NULL);
                    110:        timersub(&tv1, &tv0, &dtv);
                    111:        us = dtv.tv_sec * 1000000 + dtv.tv_usec;
                    112:        DPRINTFN(us < 5000 ? 4 : 1,
                    113:            "pipe_write: %s: wrote %d bytes in %uus\n",
                    114:            f->file.name, n, us);
                    115: #endif
                    116:        return n;
                    117: }
                    118:
                    119: int
                    120: pipe_nfds(struct file *file) {
                    121:        return 1;
                    122: }
                    123:
                    124: int
                    125: pipe_pollfd(struct file *file, struct pollfd *pfd, int events)
                    126: {
                    127:        struct pipe *f = (struct pipe *)file;
                    128:
                    129:        pfd->fd = f->fd;
                    130:        pfd->events = events;
1.2     ! ratchov   131:        return (events != 0) ? 1 : 0;
1.1       ratchov   132: }
                    133:
                    134: int
                    135: pipe_revents(struct file *f, struct pollfd *pfd)
                    136: {
                    137:        return pfd->revents;
                    138: }
                    139:
                    140: void
                    141: pipe_close(struct file *file)
                    142: {
                    143:        struct pipe *f = (struct pipe *)file;
                    144:
                    145:        close(f->fd);
                    146: }