de5663609e
James da Silva. We need to integrate this before 1.1.5 so that we can actually make the boot floppies.
857 lines
19 KiB
C
857 lines
19 KiB
C
/*
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* Copyright (c) 1994 University of Maryland
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* All Rights Reserved.
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of U.M. not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. U.M. makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*
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* U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
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* BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: James da Silva, Systems Design and Analysis Group
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* Computer Science Department
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* University of Maryland at College Park
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*/
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/*
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* ========================================================================
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* crunchgen.c
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*
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* Generates a Makefile and main C file for a crunched executable,
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* from specs given in a .conf file.
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/param.h>
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#define CRUNCH_VERSION "0.2"
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#define MAXLINELEN 16384
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#define MAXFIELDS 2048
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/* internal representation of conf file: */
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/* simple lists of strings suffice for most parms */
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typedef struct strlst {
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struct strlst *next;
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char *str;
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} strlst_t;
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/* progs have structure, each field can be set with "special" or calculated */
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typedef struct prog {
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struct prog *next;
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char *name, *ident;
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char *srcdir, *objdir;
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strlst_t *objs, *objpaths;
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strlst_t *links;
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int goterror;
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} prog_t;
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/* global state */
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strlst_t *srcdirs = NULL;
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strlst_t *libs = NULL;
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prog_t *progs = NULL;
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char line[MAXLINELEN];
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char confname[MAXPATHLEN], infilename[MAXPATHLEN];
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char outmkname[MAXPATHLEN], outcfname[MAXPATHLEN], execfname[MAXPATHLEN];
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char tempfname[MAXPATHLEN], cachename[MAXPATHLEN], curfilename[MAXPATHLEN];
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int linenum = -1;
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int goterror = 0;
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char *pname = "crunchgen";
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int verbose, readcache; /* options */
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int reading_cache;
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/* general library routines */
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void status(char *str);
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void out_of_memory(void);
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void add_string(strlst_t **listp, char *str);
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int is_dir(char *pathname);
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int is_nonempty_file(char *pathname);
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/* helper routines for main() */
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void usage(void);
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void parse_conf_file(void);
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void gen_outputs(void);
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int main(int argc, char **argv)
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{
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char *p;
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int optc;
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extern int optind;
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extern char *optarg;
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verbose = 1;
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readcache = 1;
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*outmkname = *outcfname = *execfname = '\0';
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if(argc > 0) pname = argv[0];
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while((optc = getopt(argc, argv, "m:c:e:fq")) != -1) {
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switch(optc) {
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case 'f': readcache = 0; break;
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case 'q': verbose = 0; break;
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case 'm': strcpy(outmkname, optarg); break;
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case 'c': strcpy(outcfname, optarg); break;
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case 'e': strcpy(execfname, optarg); break;
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case '?':
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default: usage();
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}
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}
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argc -= optind;
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argv += optind;
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if(argc != 1) usage();
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/*
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* generate filenames
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*/
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strcpy(infilename, argv[0]);
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/* confname = `basename infilename .conf` */
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if((p=strrchr(infilename, '/')) != NULL) strcpy(confname, p+1);
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else strcpy(confname, infilename);
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if((p=strrchr(confname, '.')) != NULL && !strcmp(p, ".conf")) *p = '\0';
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if(!*outmkname) sprintf(outmkname, "%s.mk", confname);
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if(!*outcfname) sprintf(outcfname, "%s.c", confname);
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if(!*execfname) sprintf(execfname, "%s", confname);
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sprintf(cachename, "%s.cache", confname);
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sprintf(tempfname, ".tmp_%sXXXXXX", confname);
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if(mktemp(tempfname) == NULL) {
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perror(tempfname);
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exit(1);
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}
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parse_conf_file();
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gen_outputs();
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exit(goterror);
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}
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void usage(void)
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{
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fprintf(stderr,
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"%s [-fq] [-m <makefile>] [-c <c file>] [-e <exec file>] <conffile>\n",
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pname);
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exit(1);
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}
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/*
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* ========================================================================
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* parse_conf_file subsystem
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*
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*/
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/* helper routines for parse_conf_file */
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void parse_one_file(char *filename);
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void parse_line(char *line, int *fc, char **fv, int nf);
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void add_srcdirs(int argc, char **argv);
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void add_progs(int argc, char **argv);
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void add_link(int argc, char **argv);
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void add_libs(int argc, char **argv);
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void add_special(int argc, char **argv);
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prog_t *find_prog(char *str);
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void add_prog(char *progname);
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void parse_conf_file(void)
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{
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if(!is_nonempty_file(infilename)) {
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fprintf(stderr, "%s: fatal: input file \"%s\" not found.\n",
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pname, infilename);
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exit(1);
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}
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parse_one_file(infilename);
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if(readcache && is_nonempty_file(cachename)) {
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reading_cache = 1;
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parse_one_file(cachename);
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}
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}
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void parse_one_file(char *filename)
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{
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char *fieldv[MAXFIELDS];
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int fieldc;
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void (*f)(int c, char **v);
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FILE *cf;
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sprintf(line, "reading %s", filename);
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status(line);
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strcpy(curfilename, filename);
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if((cf = fopen(curfilename, "r")) == NULL) {
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perror(curfilename);
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goterror = 1;
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return;
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}
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linenum = 0;
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while(fgets(line, MAXLINELEN, cf) != NULL) {
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linenum++;
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parse_line(line, &fieldc, fieldv, MAXFIELDS);
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if(fieldc < 1) continue;
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if(!strcmp(fieldv[0], "srcdirs")) f = add_srcdirs;
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else if(!strcmp(fieldv[0], "progs")) f = add_progs;
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else if(!strcmp(fieldv[0], "ln")) f = add_link;
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else if(!strcmp(fieldv[0], "libs")) f = add_libs;
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else if(!strcmp(fieldv[0], "special")) f = add_special;
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else {
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fprintf(stderr, "%s:%d: skipping unknown command `%s'.\n",
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curfilename, linenum, fieldv[0]);
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goterror = 1;
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continue;
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}
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if(fieldc < 2) {
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fprintf(stderr,
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"%s:%d: %s command needs at least 1 argument, skipping.\n",
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curfilename, linenum, fieldv[0]);
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goterror = 1;
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continue;
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}
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f(fieldc, fieldv);
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}
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if(ferror(cf)) {
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perror(curfilename);
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goterror = 1;
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}
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fclose(cf);
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}
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void parse_line(char *line, int *fc, char **fv, int nf)
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{
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char *p;
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p = line;
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*fc = 0;
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while(1) {
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while(isspace(*p)) p++;
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if(*p == '\0' || *p == '#') break;
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if(*fc < nf) fv[(*fc)++] = p;
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while(*p && !isspace(*p) && *p != '#') p++;
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if(*p == '\0' || *p == '#') break;
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*p++ = '\0';
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}
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if(*p) *p = '\0'; /* needed for '#' case */
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}
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void add_srcdirs(int argc, char **argv)
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{
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int i;
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for(i=1;i<argc;i++) {
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if(is_dir(argv[i]))
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add_string(&srcdirs, argv[i]);
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else {
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fprintf(stderr, "%s:%d: `%s' is not a directory, skipping it.\n",
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curfilename, linenum, argv[i]);
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goterror = 1;
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}
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}
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}
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void add_progs(int argc, char **argv)
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{
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int i;
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for(i=1;i<argc;i++)
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add_prog(argv[i]);
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}
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void add_prog(char *progname)
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{
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prog_t *p1, *p2;
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/* add to end, but be smart about dups */
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for(p1 = NULL, p2 = progs; p2 != NULL; p1 = p2, p2 = p2->next)
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if(!strcmp(p2->name, progname)) return;
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p2 = malloc(sizeof(prog_t));
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if(p2) p2->name = strdup(progname);
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if(!p2 || !p2->name)
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out_of_memory();
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p2->next = NULL;
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if(p1 == NULL) progs = p2;
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else p1->next = p2;
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p2->ident = p2->srcdir = p2->objdir = NULL;
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p2->links = p2->objs = NULL;
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p2->goterror = 0;
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}
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void add_link(int argc, char **argv)
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{
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int i;
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prog_t *p = find_prog(argv[1]);
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if(p == NULL) {
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fprintf(stderr,
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"%s:%d: no prog %s previously declared, skipping link.\n",
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curfilename, linenum, argv[1]);
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goterror = 1;
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return;
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}
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for(i=2;i<argc;i++)
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add_string(&p->links, argv[i]);
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}
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void add_libs(int argc, char **argv)
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{
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int i;
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for(i=1;i<argc;i++)
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add_string(&libs, argv[i]);
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}
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void add_special(int argc, char **argv)
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{
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int i;
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prog_t *p = find_prog(argv[1]);
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if(p == NULL) {
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if(reading_cache) return;
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fprintf(stderr,
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"%s:%d: no prog %s previously declared, skipping special.\n",
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curfilename, linenum, argv[1]);
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goterror = 1;
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return;
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}
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if(!strcmp(argv[2], "ident")) {
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if(argc != 4) goto argcount;
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if((p->ident = strdup(argv[3])) == NULL)
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out_of_memory();
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}
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else if(!strcmp(argv[2], "srcdir")) {
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if(argc != 4) goto argcount;
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if((p->srcdir = strdup(argv[3])) == NULL)
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out_of_memory();
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}
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else if(!strcmp(argv[2], "objdir")) {
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if(argc != 4) goto argcount;
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if((p->objdir = strdup(argv[3])) == NULL)
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out_of_memory();
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}
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else if(!strcmp(argv[2], "objs")) {
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p->objs = NULL;
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for(i=3;i<argc;i++)
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add_string(&p->objs, argv[i]);
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}
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else if(!strcmp(argv[2], "objpaths")) {
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p->objpaths = NULL;
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for(i=3;i<argc;i++)
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add_string(&p->objpaths, argv[i]);
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}
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else {
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fprintf(stderr, "%s:%d: bad parameter name `%s', skipping line.\n",
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curfilename, linenum, argv[2]);
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goterror = 1;
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}
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return;
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argcount:
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fprintf(stderr,
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"%s:%d: too %s arguments, expected \"special %s %s <string>\".\n",
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curfilename, linenum, argc < 4? "few" : "many", argv[1], argv[2]);
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goterror = 1;
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}
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prog_t *find_prog(char *str)
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{
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prog_t *p;
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for(p = progs; p != NULL; p = p->next)
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if(!strcmp(p->name, str)) return p;
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return NULL;
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}
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/*
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* ========================================================================
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* gen_outputs subsystem
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*
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*/
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/* helper subroutines */
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void remove_error_progs(void);
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void fillin_program(prog_t *p);
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void gen_specials_cache(void);
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void gen_output_makefile(void);
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void gen_output_cfile(void);
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void fillin_program_objs(prog_t *p, char *path);
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void top_makefile_rules(FILE *outmk);
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void prog_makefile_rules(FILE *outmk, prog_t *p);
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void output_strlst(FILE *outf, strlst_t *lst);
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char *genident(char *str);
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char *dir_search(char *progname);
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void gen_outputs(void)
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{
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prog_t *p;
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for(p = progs; p != NULL; p = p->next)
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fillin_program(p);
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remove_error_progs();
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gen_specials_cache();
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gen_output_cfile();
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gen_output_makefile();
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status("");
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fprintf(stderr,
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"Run \"make -f %s objs exe\" to build crunched binary.\n",
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outmkname);
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}
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void fillin_program(prog_t *p)
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{
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char path[MAXPATHLEN];
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char *srcparent;
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strlst_t *s;
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sprintf(line, "filling in parms for %s", p->name);
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status(line);
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if(!p->ident)
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p->ident = genident(p->name);
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if(!p->srcdir) {
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srcparent = dir_search(p->name);
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if(srcparent)
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sprintf(path, "%s/%s", srcparent, p->name);
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if(is_dir(path))
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p->srcdir = strdup(path);
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}
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if(!p->objdir && p->srcdir) {
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sprintf(path, "%s/obj", p->srcdir);
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if(is_dir(path))
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p->objdir = strdup(path);
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else
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p->objdir = p->srcdir;
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}
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if(p->srcdir) sprintf(path, "%s/Makefile", p->srcdir);
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if(!p->objs && p->srcdir && is_nonempty_file(path))
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fillin_program_objs(p, path);
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if(!p->objpaths && p->objdir && p->objs)
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for(s = p->objs; s != NULL; s = s->next) {
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sprintf(line, "%s/%s", p->objdir, s->str);
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add_string(&p->objpaths, line);
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}
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if(!p->srcdir && verbose)
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fprintf(stderr, "%s: %s: warning: could not find source directory.\n",
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infilename, p->name);
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if(!p->objs && verbose)
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fprintf(stderr, "%s: %s: warning: could not find any .o files.\n",
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infilename, p->name);
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if(!p->objpaths) {
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fprintf(stderr,
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"%s: %s: error: no objpaths specified or calculated.\n",
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infilename, p->name);
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p->goterror = goterror = 1;
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}
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}
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void fillin_program_objs(prog_t *p, char *path)
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{
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char *obj, *cp;
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int rc;
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FILE *f;
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/* discover the objs from the srcdir Makefile */
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if((f = fopen(tempfname, "w")) == NULL) {
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perror(tempfname);
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goterror = 1;
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return;
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}
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fprintf(f, ".include \"%s\"\n", path);
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fprintf(f, ".if defined(PROG) && !defined(OBJS)\n");
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fprintf(f, "OBJS=${PROG}.o\n");
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fprintf(f, ".endif\n");
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fprintf(f, "crunchgen_objs:\n\t@echo 'OBJS= '${OBJS}\n");
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fclose(f);
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sprintf(line, "make -f %s crunchgen_objs 2>&1", tempfname);
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if((f = popen(line, "r")) == NULL) {
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perror("submake pipe");
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goterror = 1;
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return;
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}
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while(fgets(line, MAXLINELEN, f)) {
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if(strncmp(line, "OBJS= ", 6)) {
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fprintf(stderr, "make error: %s", line);
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goterror = 1;
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continue;
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}
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cp = line + 6;
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while(isspace(*cp)) cp++;
|
|
while(*cp) {
|
|
obj = cp;
|
|
while(*cp && !isspace(*cp)) cp++;
|
|
if(*cp) *cp++ = '\0';
|
|
add_string(&p->objs, obj);
|
|
while(isspace(*cp)) cp++;
|
|
}
|
|
}
|
|
if((rc=pclose(f)) != 0) {
|
|
fprintf(stderr, "make error: make returned %d\n", rc);
|
|
goterror = 1;
|
|
}
|
|
unlink(tempfname);
|
|
}
|
|
|
|
void remove_error_progs(void)
|
|
{
|
|
prog_t *p1, *p2;
|
|
|
|
p1 = NULL; p2 = progs;
|
|
while(p2 != NULL) {
|
|
if(!p2->goterror)
|
|
p1 = p2, p2 = p2->next;
|
|
else {
|
|
/* delete it from linked list */
|
|
fprintf(stderr, "%s: %s: ignoring program because of errors.\n",
|
|
infilename, p2->name);
|
|
if(p1) p1->next = p2->next;
|
|
else progs = p2->next;
|
|
p2 = p2->next;
|
|
}
|
|
}
|
|
}
|
|
|
|
void gen_specials_cache(void)
|
|
{
|
|
FILE *cachef;
|
|
prog_t *p;
|
|
|
|
sprintf(line, "generating %s", cachename);
|
|
status(line);
|
|
|
|
if((cachef = fopen(cachename, "w")) == NULL) {
|
|
perror(cachename);
|
|
goterror = 1;
|
|
return;
|
|
}
|
|
|
|
fprintf(cachef, "# %s - parm cache generated from %s by crunchgen %s\n\n",
|
|
cachename, infilename, CRUNCH_VERSION);
|
|
|
|
for(p = progs; p != NULL; p = p->next) {
|
|
fprintf(cachef, "\n");
|
|
if(p->srcdir)
|
|
fprintf(cachef, "special %s srcdir %s\n", p->name, p->srcdir);
|
|
if(p->objdir)
|
|
fprintf(cachef, "special %s objdir %s\n", p->name, p->objdir);
|
|
if(p->objs) {
|
|
fprintf(cachef, "special %s objs", p->name);
|
|
output_strlst(cachef, p->objs);
|
|
}
|
|
fprintf(cachef, "special %s objpaths", p->name);
|
|
output_strlst(cachef, p->objpaths);
|
|
}
|
|
fclose(cachef);
|
|
}
|
|
|
|
|
|
void gen_output_makefile(void)
|
|
{
|
|
prog_t *p;
|
|
FILE *outmk;
|
|
|
|
sprintf(line, "generating %s", outmkname);
|
|
status(line);
|
|
|
|
if((outmk = fopen(outmkname, "w")) == NULL) {
|
|
perror(outmkname);
|
|
goterror = 1;
|
|
return;
|
|
}
|
|
|
|
fprintf(outmk, "# %s - generated from %s by crunchgen %s\n\n",
|
|
outmkname, infilename, CRUNCH_VERSION);
|
|
|
|
top_makefile_rules(outmk);
|
|
|
|
for(p = progs; p != NULL; p = p->next)
|
|
prog_makefile_rules(outmk, p);
|
|
|
|
fprintf(outmk, "\n# ========\n");
|
|
fclose(outmk);
|
|
}
|
|
|
|
|
|
void gen_output_cfile(void)
|
|
{
|
|
extern char *crunched_skel[];
|
|
char **cp;
|
|
FILE *outcf;
|
|
prog_t *p;
|
|
strlst_t *s;
|
|
|
|
sprintf(line, "generating %s", outcfname);
|
|
status(line);
|
|
|
|
if((outcf = fopen(outcfname, "w")) == NULL) {
|
|
perror(outcfname);
|
|
goterror = 1;
|
|
return;
|
|
}
|
|
|
|
fprintf(outcf,
|
|
"/* %s - generated from %s by crunchgen %s */\n",
|
|
outcfname, infilename, CRUNCH_VERSION);
|
|
|
|
fprintf(outcf, "#define EXECNAME \"%s\"\n", execfname);
|
|
for(cp = crunched_skel; *cp != NULL; cp++)
|
|
fprintf(outcf, "%s\n", *cp);
|
|
|
|
for(p = progs; p != NULL; p = p->next)
|
|
fprintf(outcf, "extern int _crunched_%s_stub();\n", p->ident);
|
|
|
|
fprintf(outcf, "\nstruct stub entry_points[] = {\n");
|
|
for(p = progs; p != NULL; p = p->next) {
|
|
fprintf(outcf, "\t{ \"%s\", _crunched_%s_stub },\n",
|
|
p->name, p->ident);
|
|
for(s = p->links; s != NULL; s = s->next)
|
|
fprintf(outcf, "\t{ \"%s\", _crunched_%s_stub },\n",
|
|
s->str, p->ident);
|
|
}
|
|
|
|
fprintf(outcf, "\t{ EXECNAME, crunched_main },\n");
|
|
fprintf(outcf, "\t{ NULL, NULL }\n};\n");
|
|
fclose(outcf);
|
|
}
|
|
|
|
|
|
char *genident(char *str)
|
|
{
|
|
char *n,*s,*d;
|
|
|
|
/*
|
|
* generates a Makefile/C identifier from a program name, mapping '-' to
|
|
* '_' and ignoring all other non-identifier characters. This leads to
|
|
* programs named "foo.bar" and "foobar" to map to the same identifier.
|
|
*/
|
|
|
|
if((n = strdup(str)) == NULL)
|
|
return NULL;
|
|
for(d = s = n; *s != '\0'; s++) {
|
|
if(*s == '-') *d++ = '_';
|
|
else if(*s == '_' || isalnum(*s)) *d++ = *s;
|
|
}
|
|
*d = '\0';
|
|
return n;
|
|
}
|
|
|
|
|
|
char *dir_search(char *progname)
|
|
{
|
|
char path[MAXPATHLEN];
|
|
strlst_t *dir;
|
|
|
|
for(dir=srcdirs; dir != NULL; dir=dir->next) {
|
|
sprintf(path, "%s/%s", dir->str, progname);
|
|
if(is_dir(path)) return dir->str;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
void top_makefile_rules(FILE *outmk)
|
|
{
|
|
prog_t *p;
|
|
|
|
fprintf(outmk, "LIBS=");
|
|
output_strlst(outmk, libs);
|
|
|
|
fprintf(outmk, "CRUNCHED_OBJS=");
|
|
for(p = progs; p != NULL; p = p->next)
|
|
fprintf(outmk, " %s.lo", p->name);
|
|
fprintf(outmk, "\n");
|
|
|
|
fprintf(outmk, "SUBMAKE_TARGETS=");
|
|
for(p = progs; p != NULL; p = p->next)
|
|
fprintf(outmk, " %s_make", p->ident);
|
|
fprintf(outmk, "\n\n");
|
|
|
|
fprintf(outmk, "%s: %s.o $(CRUNCHED_OBJS)\n",
|
|
execfname, execfname);
|
|
fprintf(outmk, "\t$(CC) -static -o %s %s.o $(CRUNCHED_OBJS) $(LIBS)\n",
|
|
execfname, execfname);
|
|
fprintf(outmk, "\tstrip %s\n", execfname);
|
|
fprintf(outmk, "all: objs exe\nobjs: $(SUBMAKE_TARGETS)\n");
|
|
fprintf(outmk, "exe: %s\n", execfname);
|
|
fprintf(outmk, "clean:\n\trm -f %s *.lo *.o *_stub.c\n",
|
|
execfname);
|
|
}
|
|
|
|
|
|
void prog_makefile_rules(FILE *outmk, prog_t *p)
|
|
{
|
|
fprintf(outmk, "\n# -------- %s\n\n", p->name);
|
|
|
|
if(p->srcdir && p->objs) {
|
|
fprintf(outmk, "%s_SRCDIR=%s\n", p->ident, p->srcdir);
|
|
fprintf(outmk, "%s_OBJS=", p->ident);
|
|
output_strlst(outmk, p->objs);
|
|
fprintf(outmk, "%s_make:\n", p->ident);
|
|
fprintf(outmk, "\t(cd $(%s_SRCDIR); make $(%s_OBJS))\n\n",
|
|
p->ident, p->ident);
|
|
}
|
|
else
|
|
fprintf(outmk, "%s_make:\n\t@echo \"** cannot make objs for %s\"\n\n",
|
|
p->ident, p->name);
|
|
|
|
fprintf(outmk, "%s_OBJPATHS=", p->ident);
|
|
output_strlst(outmk, p->objpaths);
|
|
|
|
fprintf(outmk, "%s_stub.c:\n", p->name);
|
|
fprintf(outmk, "\techo \""
|
|
"int _crunched_%s_stub(int argc, char **argv, char **envp)"
|
|
"{return main(argc,argv,envp);}\" >%s_stub.c\n",
|
|
p->ident, p->name);
|
|
fprintf(outmk, "%s.lo: %s_stub.o $(%s_OBJPATHS)\n",
|
|
p->name, p->name, p->ident);
|
|
fprintf(outmk, "\tld -dc -r -o %s.lo %s_stub.o $(%s_OBJPATHS)\n",
|
|
p->name, p->name, p->ident);
|
|
fprintf(outmk, "\tcrunchide -k __crunched_%s_stub %s.lo\n",
|
|
p->ident, p->name);
|
|
}
|
|
|
|
void output_strlst(FILE *outf, strlst_t *lst)
|
|
{
|
|
for(; lst != NULL; lst = lst->next)
|
|
fprintf(outf, " %s", lst->str);
|
|
fprintf(outf, "\n");
|
|
}
|
|
|
|
|
|
/*
|
|
* ========================================================================
|
|
* general library routines
|
|
*
|
|
*/
|
|
|
|
void status(char *str)
|
|
{
|
|
static int lastlen = 0;
|
|
int len, spaces;
|
|
|
|
if(!verbose) return;
|
|
|
|
len = strlen(str);
|
|
spaces = lastlen - len;
|
|
if(spaces < 1) spaces = 1;
|
|
|
|
fprintf(stderr, " [%s]%*.*s\r", str, spaces, spaces, " ");
|
|
fflush(stderr);
|
|
lastlen = len;
|
|
}
|
|
|
|
|
|
void out_of_memory(void)
|
|
{
|
|
fprintf(stderr, "%s: %d: out of memory, stopping.\n", infilename, linenum);
|
|
exit(1);
|
|
}
|
|
|
|
|
|
void add_string(strlst_t **listp, char *str)
|
|
{
|
|
strlst_t *p1, *p2;
|
|
|
|
/* add to end, but be smart about dups */
|
|
|
|
for(p1 = NULL, p2 = *listp; p2 != NULL; p1 = p2, p2 = p2->next)
|
|
if(!strcmp(p2->str, str)) return;
|
|
|
|
p2 = malloc(sizeof(strlst_t));
|
|
if(p2) p2->str = strdup(str);
|
|
if(!p2 || !p2->str)
|
|
out_of_memory();
|
|
|
|
p2->next = NULL;
|
|
if(p1 == NULL) *listp = p2;
|
|
else p1->next = p2;
|
|
}
|
|
|
|
|
|
int is_dir(char *pathname)
|
|
{
|
|
struct stat buf;
|
|
|
|
if(stat(pathname, &buf) == -1)
|
|
return 0;
|
|
return S_ISDIR(buf.st_mode);
|
|
}
|
|
|
|
int is_nonempty_file(char *pathname)
|
|
{
|
|
struct stat buf;
|
|
|
|
if(stat(pathname, &buf) == -1)
|
|
return 0;
|
|
|
|
return S_ISREG(buf.st_mode) && buf.st_size > 0;
|
|
}
|