diff options
Diffstat (limited to 'manpage.c')
| -rw-r--r-- | manpage.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/manpage.c b/manpage.c new file mode 100644 index 00000000..14f87665 --- /dev/null +++ b/manpage.c @@ -0,0 +1,178 @@ +/* $Id: manpage.c,v 1.1 2012/06/08 10:44:52 kristaps Exp $ */ +/* + * Copyright (c) 2012 Kristaps Dzonsons <kristaps@bsd.lv> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif +#include <sys/param.h> + +#include <assert.h> +#include <getopt.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "manpath.h" +#include "mansearch.h" + +static void show(const char *, const char *); + +int +main(int argc, char *argv[]) +{ + int ch, term; + size_t i, sz, len; + struct manpage *res; + char *conf_file, *defpaths, *auxpaths, *cp, + *arch, *sec; + char buf[MAXPATHLEN]; + const char *cmd; + struct manpaths paths; + char *progname; + extern char *optarg; + extern int optind; + + term = isatty(STDIN_FILENO) && isatty(STDOUT_FILENO); + + progname = strrchr(argv[0], '/'); + if (progname == NULL) + progname = argv[0]; + else + ++progname; + + auxpaths = defpaths = conf_file = arch = sec = NULL; + memset(&paths, 0, sizeof(struct manpaths)); + + while (-1 != (ch = getopt(argc, argv, "C:M:m:S:s:"))) + switch (ch) { + case ('C'): + conf_file = optarg; + break; + case ('M'): + defpaths = optarg; + break; + case ('m'): + auxpaths = optarg; + break; + case ('S'): + arch = optarg; + break; + case ('s'): + sec = optarg; + break; + default: + goto usage; + } + + argc -= optind; + argv += optind; + + if (0 == argc) + goto usage; + + manpath_parse(&paths, conf_file, defpaths, auxpaths); + ch = mansearch(&paths, arch, sec, argc, argv, &res, &sz); + manpath_free(&paths); + + if (0 == ch) + goto usage; + + if (0 == sz) { + free(res); + return(EXIT_FAILURE); + } else if (1 == sz && term) { + i = 1; + goto show; + } else if (NULL == res) + return(EXIT_FAILURE); + + for (i = 0; i < sz; i++) { + printf("%6zu %s: %s\n", + i + 1, res[i].file, res[i].desc); + free(res[i].desc); + } + + if (0 == term) { + free(res); + return(EXIT_SUCCESS); + } + + i = 1; + printf("Enter a choice [1]: "); + fflush(stdout); + + if (NULL != (cp = fgetln(stdin, &len))) + if ('\n' == cp[--len] && len > 0) { + cp[len] = '\0'; + if ((i = atoi(cp)) < 1 || i > sz) + i = 0; + } + + if (0 == i) { + free(res); + return(EXIT_SUCCESS); + } +show: + cmd = res[i - 1].form ? "mandoc" : "cat"; + strlcpy(buf, res[i - 1].file, MAXPATHLEN); + free(res); + + show(cmd, buf); + /* NOTREACHED */ +usage: + fprintf(stderr, "usage: %s [-C conf] " + "[-M paths] " + "[-m paths] " + "[-S arch] " + "[-s section] " + "expr ...\n", + progname); + return(EXIT_FAILURE); +} + +static void +show(const char *cmd, const char *file) +{ + int fds[2]; + pid_t pid; + + if (-1 == pipe(fds)) { + perror(NULL); + exit(EXIT_FAILURE); + } + + if (-1 == (pid = fork())) { + perror(NULL); + exit(EXIT_FAILURE); + } else if (pid > 0) { + dup2(fds[0], STDIN_FILENO); + close(fds[1]); + cmd = NULL != getenv("MANPAGER") ? + getenv("MANPAGER") : + (NULL != getenv("PAGER") ? + getenv("PAGER") : "more"); + execlp(cmd, cmd, (char *)NULL); + perror(cmd); + exit(EXIT_FAILURE); + } + + dup2(fds[1], STDOUT_FILENO); + close(fds[0]); + execlp(cmd, cmd, file, (char *)NULL); + perror(cmd); + exit(EXIT_FAILURE); +} |