Annotation of mandoc/mdocml.c, Revision 1.10
1.10 ! kristaps 1: /* $Id: mdocml.c,v 1.9 2008/11/23 23:12:47 kristaps Exp $ */
1.1 kristaps 2: /*
3: * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the
7: * above copyright notice and this permission notice appear in all
8: * copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
11: * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
12: * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
13: * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
14: * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
15: * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
16: * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
17: * PERFORMANCE OF THIS SOFTWARE.
18: */
19: #include <sys/param.h>
20: #include <sys/stat.h>
21:
22: #include <assert.h>
23: #include <err.h>
24: #include <fcntl.h>
25: #include <getopt.h>
26: #include <stdio.h>
27: #include <stdlib.h>
28: #include <string.h>
29: #include <unistd.h>
30:
31: #include "libmdocml.h"
32:
1.9 kristaps 33: #define BUFFER_IN_DEF BUFSIZ /* See begin_bufs. */
34: #define BUFFER_OUT_DEF BUFSIZ /* See begin_bufs. */
1.2 kristaps 35:
1.9 kristaps 36: static void usage(void);
37:
38: static int begin_io(const struct md_args *,
1.5 kristaps 39: char *, char *);
1.9 kristaps 40: static int leave_io(const struct md_buf *,
1.5 kristaps 41: const struct md_buf *, int);
1.9 kristaps 42: static int begin_bufs(const struct md_args *,
1.5 kristaps 43: struct md_buf *, struct md_buf *);
44: static int leave_bufs(const struct md_buf *,
45: const struct md_buf *, int);
1.1 kristaps 46:
47: int
48: main(int argc, char *argv[])
49: {
50: int c;
51: char *out, *in;
1.5 kristaps 52: struct md_args args;
1.1 kristaps 53:
54: extern char *optarg;
55: extern int optind;
56:
1.4 kristaps 57: out = in = NULL;
1.10 ! kristaps 58:
! 59: (void)memset(&args, 0, sizeof(struct md_args));
1.1 kristaps 60:
1.9 kristaps 61: while (-1 != (c = getopt(argc, argv, "vo:")))
1.1 kristaps 62: switch (c) {
63: case ('o'):
64: out = optarg;
65: break;
1.9 kristaps 66: case ('v'):
67: args.dbg++;
68: break;
1.1 kristaps 69: default:
70: usage();
71: return(1);
72: }
73:
74: argv += optind;
1.4 kristaps 75: argc -= optind;
1.1 kristaps 76:
1.4 kristaps 77: if (1 == argc)
78: in = *argv++;
1.1 kristaps 79:
1.10 ! kristaps 80: args.type = MD_DUMMY;
1.5 kristaps 81:
82: return(begin_io(&args, out ? out : "-", in ? in : "-"));
1.1 kristaps 83: }
84:
85:
1.9 kristaps 86: /*
87: * Close out file descriptors opened in begin_io. If the descriptor
88: * refers to stdin/stdout, then do nothing.
89: */
1.1 kristaps 90: static int
1.5 kristaps 91: leave_io(const struct md_buf *out,
92: const struct md_buf *in, int c)
1.1 kristaps 93: {
1.4 kristaps 94: assert(out);
1.1 kristaps 95: assert(in);
96:
1.4 kristaps 97: if (-1 != in->fd && -1 == close(in->fd)) {
98: assert(in->name);
99: warn("%s", in->name);
100: c = 1;
101: }
102: if (-1 != out->fd && STDOUT_FILENO != out->fd &&
103: -1 == close(out->fd)) {
104: assert(out->name);
105: warn("%s", out->name);
106: c = 1;
107: }
1.1 kristaps 108:
1.4 kristaps 109: return(c);
1.1 kristaps 110: }
111:
112:
1.9 kristaps 113: /*
114: * Open file descriptors or assign stdin/stdout, if dictated by the "-"
115: * token instead of a filename.
116: */
1.1 kristaps 117: static int
1.5 kristaps 118: begin_io(const struct md_args *args, char *out, char *in)
1.1 kristaps 119: {
1.5 kristaps 120: struct md_buf fi;
121: struct md_buf fo;
1.4 kristaps 122:
123: #define FI_FL O_RDONLY
124: #define FO_FL O_WRONLY|O_CREAT|O_TRUNC
1.1 kristaps 125:
1.5 kristaps 126: assert(args);
1.1 kristaps 127: assert(out);
128: assert(in);
129:
1.5 kristaps 130: bzero(&fi, sizeof(struct md_buf));
131: bzero(&fo, sizeof(struct md_buf));
1.1 kristaps 132:
1.4 kristaps 133: fi.fd = STDIN_FILENO;
134: fo.fd = STDOUT_FILENO;
1.1 kristaps 135:
1.4 kristaps 136: fi.name = in;
137: fo.name = out;
1.1 kristaps 138:
1.4 kristaps 139: if (0 != strncmp(fi.name, "-", 1))
140: if (-1 == (fi.fd = open(fi.name, FI_FL, 0))) {
141: warn("%s", fi.name);
142: return(leave_io(&fo, &fi, 1));
143: }
1.1 kristaps 144:
1.4 kristaps 145: if (0 != strncmp(fo.name, "-", 1))
146: if (-1 == (fo.fd = open(fo.name, FO_FL, 0644))) {
147: warn("%s", fo.name);
148: return(leave_io(&fo, &fi, 1));
149: }
1.1 kristaps 150:
1.5 kristaps 151: return(leave_io(&fo, &fi, begin_bufs(args, &fo, &fi)));
1.4 kristaps 152: }
1.1 kristaps 153:
154:
1.9 kristaps 155: /*
156: * Free buffers allocated in begin_bufs.
157: */
1.4 kristaps 158: static int
1.5 kristaps 159: leave_bufs(const struct md_buf *out,
160: const struct md_buf *in, int c)
1.4 kristaps 161: {
162: assert(out);
163: assert(in);
164: if (out->buf)
165: free(out->buf);
166: if (in->buf)
167: free(in->buf);
1.1 kristaps 168: return(c);
169: }
170:
171:
1.9 kristaps 172: /*
173: * Allocate buffers to the maximum of either the input file's blocksize
174: * or BUFFER_IN_DEF/BUFFER_OUT_DEF, which should be around BUFSIZE.
175: */
1.1 kristaps 176: static int
1.5 kristaps 177: begin_bufs(const struct md_args *args,
178: struct md_buf *out, struct md_buf *in)
1.1 kristaps 179: {
180: struct stat stin, stout;
1.5 kristaps 181: int c;
1.1 kristaps 182:
1.5 kristaps 183: assert(args);
1.1 kristaps 184: assert(in);
185: assert(out);
186:
187: if (-1 == fstat(in->fd, &stin)) {
1.3 kristaps 188: warn("%s", in->name);
1.1 kristaps 189: return(1);
1.8 kristaps 190: } else if (0 == stin.st_size) {
191: warnx("%s: empty file", in->name);
192: return(1);
1.1 kristaps 193: } else if (-1 == fstat(out->fd, &stout)) {
1.3 kristaps 194: warn("%s", out->name);
1.1 kristaps 195: return(1);
196: }
197:
1.3 kristaps 198: in->bufsz = MAX(stin.st_blksize, BUFFER_IN_DEF);
199: out->bufsz = MAX(stout.st_blksize, BUFFER_OUT_DEF);
1.1 kristaps 200:
1.3 kristaps 201: if (NULL == (in->buf = malloc(in->bufsz))) {
1.1 kristaps 202: warn("malloc");
1.4 kristaps 203: return(leave_bufs(out, in, 1));
1.3 kristaps 204: } else if (NULL == (out->buf = malloc(out->bufsz))) {
1.1 kristaps 205: warn("malloc");
1.4 kristaps 206: return(leave_bufs(out, in, 1));
1.1 kristaps 207: }
208:
1.5 kristaps 209: c = md_run(args, out, in);
210: return(leave_bufs(out, in, -1 == c ? 1 : 0));
1.1 kristaps 211: }
212:
213:
214: static void
215: usage(void)
216: {
217: extern char *__progname;
218:
1.9 kristaps 219: (void)printf("usage: %s [-v] [-o outfile] [infile]\n",
220: __progname);
1.1 kristaps 221: }
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