Annotation of mandoc/mdocml.c, Revision 1.15
1.15 ! kristaps 1: /* $Id: mdocml.c,v 1.14 2008/11/28 11:21:12 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:
1.13 kristaps 61: while (-1 != (c = getopt(argc, argv, "o:vW")))
1.1 kristaps 62: switch (c) {
63: case ('o'):
64: out = optarg;
65: break;
1.13 kristaps 66: case ('v'):
67: args.verbosity++;
68: break;
69: case ('W'):
70: args.warnings |= MD_WARN_ALL;
71: break;
1.1 kristaps 72: default:
73: usage();
74: return(1);
75: }
76:
77: argv += optind;
1.4 kristaps 78: argc -= optind;
1.1 kristaps 79:
1.4 kristaps 80: if (1 == argc)
81: in = *argv++;
1.1 kristaps 82:
1.5 kristaps 83: return(begin_io(&args, out ? out : "-", in ? in : "-"));
1.1 kristaps 84: }
85:
86:
1.9 kristaps 87: /*
88: * Close out file descriptors opened in begin_io. If the descriptor
89: * refers to stdin/stdout, then do nothing.
90: */
1.1 kristaps 91: static int
1.5 kristaps 92: leave_io(const struct md_buf *out,
93: const struct md_buf *in, int c)
1.1 kristaps 94: {
1.4 kristaps 95: assert(out);
1.1 kristaps 96: assert(in);
97:
1.4 kristaps 98: if (-1 != in->fd && -1 == close(in->fd)) {
99: assert(in->name);
100: warn("%s", in->name);
101: c = 1;
102: }
103: if (-1 != out->fd && STDOUT_FILENO != out->fd &&
104: -1 == close(out->fd)) {
105: assert(out->name);
106: warn("%s", out->name);
107: c = 1;
108: }
1.15 ! kristaps 109: if (1 == c && STDOUT_FILENO != out->fd)
! 110: if (-1 == unlink(out->name))
! 111: warn("%s", out->name);
1.1 kristaps 112:
1.4 kristaps 113: return(c);
1.1 kristaps 114: }
115:
116:
1.9 kristaps 117: /*
118: * Open file descriptors or assign stdin/stdout, if dictated by the "-"
119: * token instead of a filename.
120: */
1.1 kristaps 121: static int
1.5 kristaps 122: begin_io(const struct md_args *args, char *out, char *in)
1.1 kristaps 123: {
1.5 kristaps 124: struct md_buf fi;
125: struct md_buf fo;
1.4 kristaps 126:
127: #define FI_FL O_RDONLY
128: #define FO_FL O_WRONLY|O_CREAT|O_TRUNC
1.1 kristaps 129:
1.5 kristaps 130: assert(args);
1.1 kristaps 131: assert(out);
132: assert(in);
133:
1.5 kristaps 134: bzero(&fi, sizeof(struct md_buf));
135: bzero(&fo, sizeof(struct md_buf));
1.1 kristaps 136:
1.4 kristaps 137: fi.fd = STDIN_FILENO;
138: fo.fd = STDOUT_FILENO;
1.1 kristaps 139:
1.4 kristaps 140: fi.name = in;
141: fo.name = out;
1.1 kristaps 142:
1.4 kristaps 143: if (0 != strncmp(fi.name, "-", 1))
144: if (-1 == (fi.fd = open(fi.name, FI_FL, 0))) {
145: warn("%s", fi.name);
146: return(leave_io(&fo, &fi, 1));
147: }
1.1 kristaps 148:
1.4 kristaps 149: if (0 != strncmp(fo.name, "-", 1))
150: if (-1 == (fo.fd = open(fo.name, FO_FL, 0644))) {
151: warn("%s", fo.name);
152: return(leave_io(&fo, &fi, 1));
153: }
1.1 kristaps 154:
1.5 kristaps 155: return(leave_io(&fo, &fi, begin_bufs(args, &fo, &fi)));
1.4 kristaps 156: }
1.1 kristaps 157:
158:
1.9 kristaps 159: /*
160: * Free buffers allocated in begin_bufs.
161: */
1.4 kristaps 162: static int
1.5 kristaps 163: leave_bufs(const struct md_buf *out,
164: const struct md_buf *in, int c)
1.4 kristaps 165: {
166: assert(out);
167: assert(in);
168: if (out->buf)
169: free(out->buf);
170: if (in->buf)
171: free(in->buf);
1.1 kristaps 172: return(c);
173: }
174:
175:
1.9 kristaps 176: /*
177: * Allocate buffers to the maximum of either the input file's blocksize
178: * or BUFFER_IN_DEF/BUFFER_OUT_DEF, which should be around BUFSIZE.
179: */
1.1 kristaps 180: static int
1.5 kristaps 181: begin_bufs(const struct md_args *args,
182: struct md_buf *out, struct md_buf *in)
1.1 kristaps 183: {
184: struct stat stin, stout;
1.5 kristaps 185: int c;
1.1 kristaps 186:
1.5 kristaps 187: assert(args);
1.1 kristaps 188: assert(in);
189: assert(out);
190:
191: if (-1 == fstat(in->fd, &stin)) {
1.3 kristaps 192: warn("%s", in->name);
1.1 kristaps 193: return(1);
1.12 kristaps 194: } else if (STDIN_FILENO != in->fd && 0 == stin.st_size) {
1.8 kristaps 195: warnx("%s: empty file", in->name);
196: return(1);
1.1 kristaps 197: } else if (-1 == fstat(out->fd, &stout)) {
1.3 kristaps 198: warn("%s", out->name);
1.1 kristaps 199: return(1);
200: }
201:
1.3 kristaps 202: in->bufsz = MAX(stin.st_blksize, BUFFER_IN_DEF);
203: out->bufsz = MAX(stout.st_blksize, BUFFER_OUT_DEF);
1.1 kristaps 204:
1.3 kristaps 205: if (NULL == (in->buf = malloc(in->bufsz))) {
1.1 kristaps 206: warn("malloc");
1.4 kristaps 207: return(leave_bufs(out, in, 1));
1.3 kristaps 208: } else if (NULL == (out->buf = malloc(out->bufsz))) {
1.1 kristaps 209: warn("malloc");
1.4 kristaps 210: return(leave_bufs(out, in, 1));
1.1 kristaps 211: }
212:
1.5 kristaps 213: c = md_run(args, out, in);
214: return(leave_bufs(out, in, -1 == c ? 1 : 0));
1.1 kristaps 215: }
216:
217:
218: static void
219: usage(void)
220: {
221: extern char *__progname;
222:
1.13 kristaps 223: (void)printf("usage: %s [-vW] [-o outfile] [infile]\n", __progname);
1.1 kristaps 224: }
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