diff options
Diffstat (limited to 'release/picobsd/tinyware/help/help.c')
| -rw-r--r-- | release/picobsd/tinyware/help/help.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/release/picobsd/tinyware/help/help.c b/release/picobsd/tinyware/help/help.c new file mode 100644 index 0000000..b57b4f6 --- /dev/null +++ b/release/picobsd/tinyware/help/help.c @@ -0,0 +1,157 @@ +/*- + * Copyright (c) 1998 Eric P. Scott <eps@sirius.com> + * Copyright (c) 1998 Andrzej Bialecki <abial@freebsd.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + + +#include <stdio.h> +#include <string.h> +#include <ar.h> +#include <sys/ioctl.h> + +int display(FILE *, const char *); + +static int cnt, crt=-1; + +int +main(int argc, char *argv[]) +{ + register int i, s; + FILE *fd; + struct ttysize ts; + + if (!(fd=fopen("/help.a", "r"))) { + (void)fputs("Couldn't open help archive.\n", stderr); + exit(1); + } + cnt=0; + if (ioctl(fileno(stdout), TIOCGWINSZ, &ts)>=0) { + crt=ts.ts_lines-1; + } + if (crt<3) crt=23; + s=display(fd, argc>1 ? argv[1] : "help"); + if (s<0) s=0; + else for (i=2;i<argc;) { + rewind(fd); + s|=display(fd, argv[i++]); + if (s<0) { + s=0; + break; + } + } + (void)fclose(fd); + exit(s); +} + +int +more(void) +{ + char buf[8]; + + (void)fflush(stdout); + (void)fputs("\033[7mPress Enter to continue\033[m", stderr); + (void)fflush(stderr); + cnt=0; + if (fgets(buf, sizeof buf, stdin)) return 0; + (void)fputc('\n', stderr); + return 1; +} + +int +display(FILE *fd, const char *fname) +{ + register char *p; + register int c, n, o; + struct ar_hdr ar; + char aname[20]; + + if (!fgets(aname, sizeof aname, fd)) { + return 1; + } + if (strncmp(aname, ARMAG, SARMAG)) return 1; + (void)snprintf(aname, sizeof(aname), "%s/", fname); + for (;;) { + if (fread((void *)&ar, sizeof ar, 1, fd)!=1) return 1; + if (strncmp(ar.ar_fmag, ARFMAG, 2)) return 1; + n=0; + p=ar.ar_size; + do { + if ((c=(int)(*p++-'0'))<0||c>9) break; + n*=10; n+=c; + } while (p<&ar.ar_size[sizeof ar.ar_size]); + if (!strncmp(ar.ar_name, aname, strlen(aname))) break; + if (fseek(fd, (long)n, SEEK_CUR)<0) return 1; + if ((n&1)&&fgetc(fd)!='\n') return 1; + } + if (cnt>=crt&&more()) return -1; + (void)fputc('\n', stdout); + cnt++; + o=0; while (o<n&&(c=fgetc(fd))!=EOF) { + per: + o++; + (void)fputc(c, stdout); + if (c!='\n') continue; + if (++cnt<crt) continue; + if (o>=n||(c=fgetc(fd))==EOF) break; + if (more()) return -1; + goto per; + } + if (cnt>=crt&&more()) return -1; + (void)fputc('\n', stdout); + cnt++; + if (!strcmp(fname, "help")) { + rewind(fd); + (void)fgets(aname, sizeof aname, fd); + if (cnt>=crt&&more()) return -1; + (void)fputs("The following help items are available:\n", + stdout); + cnt++; + o=0; + while (fread((void *)&ar, sizeof ar, 1, fd)==1) { + if (strncmp(ar.ar_fmag, ARFMAG, 2)) break; + if ((o%6)==0) { + (void)fputc('\n', stdout); + if (++cnt>=crt&&more()) return -1; + } + *(index(ar.ar_name,'/'))=' '; + (void)printf("%.13s", ar.ar_name); + ++o; + n=0; + p=ar.ar_size; + do { + if ((c=(int)(*p++-'0'))<0||c>9) break; + n*=10; n+=c; + } while (p<&ar.ar_size[sizeof ar.ar_size]); + if (fseek(fd, (long)n, SEEK_CUR)<0) break; + if ((n&1)&&fgetc(fd)!='\n') break; + } + if (cnt>=crt&&more()) return -1; + (void)fputc('\n', stdout); + cnt++; + } + return 0; +} |
