| #include <stdio.h> |
| #include <string.h> |
| #include <mntent.h> |
| #include <errno.h> |
| |
| static char *internal_buf; |
| static size_t internal_bufsize; |
| |
| #define SENTINEL (char *)&internal_buf |
| |
| FILE *setmntent(const char *name, const char *mode) |
| { |
| return fopen(name, mode); |
| } |
| |
| int endmntent(FILE *f) |
| { |
| if (f) fclose(f); |
| return 1; |
| } |
| |
| struct mntent *getmntent_r(FILE *f, struct mntent *mnt, char *linebuf, int buflen) |
| { |
| int cnt, n[8], use_internal = (linebuf == SENTINEL); |
| |
| mnt->mnt_freq = 0; |
| mnt->mnt_passno = 0; |
| |
| do { |
| if (use_internal) { |
| getline(&internal_buf, &internal_bufsize, f); |
| linebuf = internal_buf; |
| } else { |
| fgets(linebuf, buflen, f); |
| } |
| if (feof(f) || ferror(f)) return 0; |
| if (!strchr(linebuf, '\n')) { |
| fscanf(f, "%*[^\n]%*[\n]"); |
| errno = ERANGE; |
| return 0; |
| } |
| cnt = sscanf(linebuf, " %n%*s%n %n%*s%n %n%*s%n %n%*s%n %d %d", |
| n, n+1, n+2, n+3, n+4, n+5, n+6, n+7, |
| &mnt->mnt_freq, &mnt->mnt_passno); |
| } while (cnt < 2 || linebuf[n[0]] == '#'); |
| |
| linebuf[n[1]] = 0; |
| linebuf[n[3]] = 0; |
| linebuf[n[5]] = 0; |
| linebuf[n[7]] = 0; |
| |
| mnt->mnt_fsname = linebuf+n[0]; |
| mnt->mnt_dir = linebuf+n[2]; |
| mnt->mnt_type = linebuf+n[4]; |
| mnt->mnt_opts = linebuf+n[6]; |
| |
| return mnt; |
| } |
| |
| struct mntent *getmntent(FILE *f) |
| { |
| static struct mntent mnt; |
| return getmntent_r(f, &mnt, SENTINEL, 0); |
| } |
| |
| int addmntent(FILE *f, const struct mntent *mnt) |
| { |
| if (fseek(f, 0, SEEK_END)) return 1; |
| return fprintf(f, "%s\t%s\t%s\t%s\t%d\t%d\n", |
| mnt->mnt_fsname, mnt->mnt_dir, mnt->mnt_type, mnt->mnt_opts, |
| mnt->mnt_freq, mnt->mnt_passno) < 0; |
| } |
| |
| char *hasmntopt(const struct mntent *mnt, const char *opt) |
| { |
| return strstr(mnt->mnt_opts, opt); |
| } |