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Diffstat (limited to 'src/filenames.c')
| -rw-r--r-- | src/filenames.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/src/filenames.c b/src/filenames.c new file mode 100644 index 0000000..a3ba7e5 --- /dev/null +++ b/src/filenames.c @@ -0,0 +1,151 @@ +/* + * filenames.c: compose and dissect man page file names + * + * Copyright (C) 1994, 1995 Graeme W. Wilford. (Wilf.) + * Copyright (C) 2001, 2002 Colin Watson. + * + * This file is part of man-db. + * + * man-db 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. + * + * man-db 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. + * + * You should have received a copy of the GNU General Public License + * along with man-db; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif /* HAVE_CONFIG_H */ + +#include <string.h> +#include <stdlib.h> +#include <unistd.h> + +#include "xvasprintf.h" + +#include "gettext.h" +#define _(String) gettext (String) + +#include "manconfig.h" + +#include "error.h" + +#include "db_storage.h" + +#include "filenames.h" + +static void gripe_bogus_manpage (const char *manpage) +{ + if (quiet < 2) + error (0, 0, _("warning: %s: ignoring bogus filename"), + manpage); +} + +char *make_filename (const char *path, const char *name, + struct mandata *in, const char *type) +{ + static char *file; + + if (!name) + name = in->name; /* comes from dblookup(), so non-NULL */ + + file = xasprintf ("%s/%s%s/%s.%s", path, type, in->sec, name, in->ext); + + if (in->comp && *in->comp != '-') /* Is there an extension? */ + file = appendstr (file, ".", in->comp, (void *) 0); + + debug ("Checking physical location: %s\n", file); + if (!CAN_ACCESS (file, R_OK)) { + free (file); + return NULL; + } + + return file; +} + +/* Fill in a mandata structure with information about a file name. + * file is the name to examine. info points to the structure to be filled + * in. req_name is the page name that was requested. + * + * Returns either a pointer to the buffer which the fields in info point + * into, to be freed by the caller, or NULL on error. The buffer will + * contain either three or four null-terminated strings: the directory name, + * the base of the file name in that directory, the section extension, and + * optionally the compression extension. + * + * Only the fields name, ext, sec, and comp are filled in by this function. + * name is only set if it differs from req_name; otherwise it remains at + * NULL. + */ +char *filename_info (const char *file, struct mandata *info, + const char *req_name) +{ + char *manpage = xstrdup (file); + char *slash = strrchr (manpage, '/'); + char *base_name; + struct compression *comp; + + memset (info, 0, sizeof (struct mandata)); + + if (slash) { + *slash = '\0'; /* strip '/base_name' */ + base_name = slash + 1; + } else + base_name = manpage; + + /* Bogus files either have (i) no period, ie no extension, (ii) + a compression extension, but no sectional extension, (iii) + a missmatch between the section they are under and the + sectional part of their extension. */ + + comp = comp_info (base_name, 1); + if (comp) { + info->comp = comp->ext; + *(base_name + strlen (comp->stem)) = '\0'; + free (comp->stem); + } else + info->comp = NULL; + + { + char *ext = strrchr (base_name, '.'); + if (!ext) { + /* no section extension */ + gripe_bogus_manpage (file); + free (manpage); + return NULL; + } + *ext++ = '\0'; /* set section ext */ + info->ext = ext; + if (!*info->ext) { + /* zero-length section extension */ + gripe_bogus_manpage (file); + free (manpage); + return NULL; + } + } + + info->sec = strrchr (manpage, '/') + 4; /* set section name */ + + if (strlen (info->sec) >= 1 && strlen (info->ext) >= 1 && + info->sec[0] != info->ext[0]) { + /* mismatch in section */ + gripe_bogus_manpage (file); + free (manpage); + return NULL; + } + + if (req_name && !STREQ (base_name, req_name)) + info->name = xstrdup (base_name); + else + info->name = NULL; + + return manpage; +} |