diff options
Diffstat (limited to 'src/pmieconf/io.c')
| -rw-r--r-- | src/pmieconf/io.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/src/pmieconf/io.c b/src/pmieconf/io.c new file mode 100644 index 0000000..86a8025 --- /dev/null +++ b/src/pmieconf/io.c @@ -0,0 +1,229 @@ +/* + * Copyright 1998, Silicon Graphics, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +#include <stdarg.h> +#include "pmapi.h" +#include "impl.h" +#ifdef HAVE_SYS_IOCTL_H +#include <sys/ioctl.h> +#endif +#ifdef HAVE_TERMIOS_H +#include <termios.h> +#endif +#ifdef HAVE_TERMIO_H +#include <termio.h> +#endif + +#define MINCOLS 80 +#define MINROWS 24 + +static int neols = -1; +static int needresize; +static int needscroll; +static int skiprest; +static int nrows; +static int ncols; +static char shortmsg[] = "more? (h=help) "; +static char longmsg[] = \ + "[q or n to stop, y or <space> to go on, <enter> to step] more? "; +#ifdef HAVE_TERMIO_H +static struct termio otty; +#endif + +void setio(int reset) { neols = 0; skiprest = reset; } +void setscroll(void) { needscroll = 1; } +int resized(void) { return needresize; } + +/* looks after window resizing for the printing routine */ +void +onwinch(int dummy) +{ +#ifdef SIGWINCH + __pmSetSignalHandler(SIGWINCH, onwinch); +#endif + needresize = 1; +} + +/* in interactive mode scrolling, if no more wanted skiprest is set */ +static void +promptformore(void) +{ + int i; + int ch; + int sts = 1; + char c; + char *prompt; +#ifdef HAVE_TERMIO_H + static int first = 1; + struct termio ntty; +#endif + +#ifdef HAVE_TERMIO_H + if (first) { + if (ioctl(0, TCGETA, &otty) < 0) { + fprintf(stderr, "%s: TCGETA ioctl failed: %s\n", pmProgname, + osstrerror()); + exit(1); + } + first = 0; + } + + /* put terminal into raw mode so we can read input immediately */ + memcpy(&ntty, &otty, sizeof(struct termio)); + ntty.c_cc[VMIN] = 1; + ntty.c_cc[VTIME] = 1; + ntty.c_lflag &= ~(ICANON | ECHO); + if (ioctl(0, TCSETAW, &ntty) < 0) { + fprintf(stderr, "%s: TCSETAW ioctl failed: %s\n", pmProgname, + osstrerror()); + exit(1); + } +#endif + + prompt = shortmsg; + while (sts == 1) { + putchar('\r'); + for (i = 0; i < ncols-1; i++) + putchar(' '); + putchar('\r'); + printf("%s", prompt); + fflush(stdout); + + if (read(0, &c, 1) != 1) { + sts = 1; + goto reset_tty; + } + ch = (int)c; + + switch(ch) { + case 'n': /* stop */ + case 'q': + setio(1); + sts = 0; + break; + case 'y': /* page down */ + case ' ': + neols = sts = 0; + break; + case '\n': /* step down */ + neols = nrows; + sts = 0; + break; + default: + prompt = longmsg; + } + } + +reset_tty: +#ifdef HAVE_TERMIO_H + if (ioctl(0, TCSETAW, &otty) < 0) { + fprintf(stderr, "%s: reset TCSETAW ioctl failed: %s\n", pmProgname, + osstrerror()); + exit(1); + } +#endif + + putchar('\r'); + for (i = 0; i < ncols-1; i++) + putchar(' '); + putchar('\r'); + fflush(stdout); +} + +/* + * generic printing routine which can pause at end of a screenful. + * if this returns 1, the user has requested an end to this info, + * so the caller must always observe the pprintf return value. + */ +void +pprintf(char *format, ...) +{ + char *p; + va_list args; +#ifdef TIOCGWINSZ + struct winsize geom; +#endif + static int first = 1; + + if (first == 1) { /* first time thru */ + first = 0; +#ifdef TIOCGWINSZ + ioctl(0, TIOCGWINSZ, &geom); + nrows = (geom.ws_row < MINROWS? MINROWS : geom.ws_row); + ncols = (geom.ws_col < MINCOLS? MINCOLS : geom.ws_col); +#else + nrows = MINROWS; + ncols = MINCOLS; +#endif + } + + if (skiprest) + return; + + va_start(args, format); + if (needscroll) { + /* + * use the fact that i know we never print more than MINROWS at once + * to figure out how many lines we've done before doing the vfprintf + */ + if (neols >= nrows-1) { + promptformore(); + if (skiprest) { + va_end(args); + return; + } + } + for (p = format; *p != '\0'; p++) + if (*p == '\n') neols++; + vfprintf(stdout, format, args); + } + else + vfprintf(stdout, format, args); + va_end(args); + if (needresize) { +#ifdef HAVE_TIOCGWINSZ + ioctl(0, TIOCGWINSZ, &geom); + nrows = (geom.ws_row < MINROWS? MINROWS : geom.ws_row); + ncols = (geom.ws_col < MINCOLS? MINCOLS : geom.ws_col); +#ifdef PMIECONF_DEBUG + printf("debug - reset size: cols=%d rows=%d\n", ncols, nrows); +#endif +#endif + needresize = 0; + } +} + +/* general error printing routine */ +void +error(char *format, ...) +{ + va_list args; + FILE *f; + + if (skiprest) + return; + va_start(args, format); + if (needscroll) { + f = stdout; + fprintf(f, " Error - "); + } + else { + f = stderr; + fprintf(f, "%s: error - ", pmProgname); + } + vfprintf(f, format, args); + fprintf(f, "\n"); + neols++; + va_end(args); +} |