1 #include <stdio.h>
2 #include <string.h>
3 #include <mntent.h>
4 #include <errno.h>
5
setmntent(const char * name,const char * mode)6 FILE *setmntent(const char *name, const char *mode)
7 {
8 return fopen(name, mode);
9 }
10
endmntent(FILE * f)11 int endmntent(FILE *f)
12 {
13 if (f) fclose(f);
14 return 1;
15 }
16
getmntent_r(FILE * f,struct mntent * mnt,char * linebuf,int buflen)17 struct mntent *getmntent_r(FILE *f, struct mntent *mnt, char *linebuf, int buflen)
18 {
19 int cnt, n[8];
20
21 mnt->mnt_freq = 0;
22 mnt->mnt_passno = 0;
23
24 do {
25 fgets(linebuf, buflen, f);
26 if (feof(f) || ferror(f)) return 0;
27 if (!strchr(linebuf, '\n')) {
28 fscanf(f, "%*[^\n]%*[\n]");
29 errno = ERANGE;
30 return 0;
31 }
32 cnt = sscanf(linebuf, " %n%*s%n %n%*s%n %n%*s%n %n%*s%n %d %d",
33 n, n+1, n+2, n+3, n+4, n+5, n+6, n+7,
34 &mnt->mnt_freq, &mnt->mnt_passno);
35 } while (cnt < 2 || linebuf[n[0]] == '#');
36
37 linebuf[n[1]] = 0;
38 linebuf[n[3]] = 0;
39 linebuf[n[5]] = 0;
40 linebuf[n[7]] = 0;
41
42 mnt->mnt_fsname = linebuf+n[0];
43 mnt->mnt_dir = linebuf+n[2];
44 mnt->mnt_type = linebuf+n[4];
45 mnt->mnt_opts = linebuf+n[6];
46
47 return mnt;
48 }
49
getmntent(FILE * f)50 struct mntent *getmntent(FILE *f)
51 {
52 static char linebuf[256];
53 static struct mntent mnt;
54 return getmntent_r(f, &mnt, linebuf, sizeof linebuf);
55 }
56
addmntent(FILE * f,const struct mntent * mnt)57 int addmntent(FILE *f, const struct mntent *mnt)
58 {
59 if (fseek(f, 0, SEEK_END)) return 1;
60 return fprintf(f, "%s\t%s\t%s\t%s\t%d\t%d\n",
61 mnt->mnt_fsname, mnt->mnt_dir, mnt->mnt_type, mnt->mnt_opts,
62 mnt->mnt_freq, mnt->mnt_passno) < 0;
63 }
64
hasmntopt(const struct mntent * mnt,const char * opt)65 char *hasmntopt(const struct mntent *mnt, const char *opt)
66 {
67 return strstr(mnt->mnt_opts, opt);
68 }
69