1#include <stdio.h> 2#include <string.h> 3#include <mntent.h> 4#include <errno.h> 5 6static char *internal_buf; 7static size_t internal_bufsize; 8 9#define SENTINEL (char *)&internal_buf 10 11FILE *setmntent(const char *name, const char *mode) 12{ 13 return fopen(name, mode); 14} 15 16int endmntent(FILE *f) 17{ 18 if (f) fclose(f); 19 return 1; 20} 21 22struct mntent *getmntent_r(FILE *f, struct mntent *mnt, char *linebuf, int buflen) 23{ 24 int cnt, n[8], use_internal = (linebuf == SENTINEL); 25 26 mnt->mnt_freq = 0; 27 mnt->mnt_passno = 0; 28 29 do { 30 if (use_internal) { 31 getline(&internal_buf, &internal_bufsize, f); 32 linebuf = internal_buf; 33 } else { 34 fgets(linebuf, buflen, f); 35 } 36 if (feof(f) || ferror(f)) return 0; 37 if (!strchr(linebuf, '\n')) { 38 fscanf(f, "%*[^\n]%*[\n]"); 39 errno = ERANGE; 40 return 0; 41 } 42 cnt = sscanf(linebuf, " %n%*s%n %n%*s%n %n%*s%n %n%*s%n %d %d", 43 n, n+1, n+2, n+3, n+4, n+5, n+6, n+7, 44 &mnt->mnt_freq, &mnt->mnt_passno); 45 } while (cnt < 2 || linebuf[n[0]] == '#'); 46 47 linebuf[n[1]] = 0; 48 linebuf[n[3]] = 0; 49 linebuf[n[5]] = 0; 50 linebuf[n[7]] = 0; 51 52 mnt->mnt_fsname = linebuf+n[0]; 53 mnt->mnt_dir = linebuf+n[2]; 54 mnt->mnt_type = linebuf+n[4]; 55 mnt->mnt_opts = linebuf+n[6]; 56 57 return mnt; 58} 59 60struct mntent *getmntent(FILE *f) 61{ 62 static struct mntent mnt; 63 return getmntent_r(f, &mnt, SENTINEL, 0); 64} 65 66int addmntent(FILE *f, const struct mntent *mnt) 67{ 68 if (fseek(f, 0, SEEK_END)) return 1; 69 return fprintf(f, "%s\t%s\t%s\t%s\t%d\t%d\n", 70 mnt->mnt_fsname, mnt->mnt_dir, mnt->mnt_type, mnt->mnt_opts, 71 mnt->mnt_freq, mnt->mnt_passno) < 0; 72} 73 74char *hasmntopt(const struct mntent *mnt, const char *opt) 75{ 76 return strstr(mnt->mnt_opts, opt); 77} 78