diff options
Diffstat (limited to 'src/lib9/_p9dir.c')
| -rw-r--r-- | src/lib9/_p9dir.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/src/lib9/_p9dir.c b/src/lib9/_p9dir.c new file mode 100644 index 000000000..58c0822a4 --- /dev/null +++ b/src/lib9/_p9dir.c @@ -0,0 +1,179 @@ +/* +Plan 9 from User Space src/lib9/_p9dir.c +http://code.swtch.com/plan9port/src/tip/src/lib9/_p9dir.c + +Copyright 2001-2007 Russ Cox. All Rights Reserved. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. +*/ + +#include <u.h> +#define NOPLAN9DEFINES +#include <libc.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <dirent.h> + +/* + * Caching the last group and passwd looked up is + * a significant win (stupidly enough) on most systems. + * It's not safe for threaded programs, but neither is using + * getpwnam in the first place, so I'm not too worried. + */ +int +_p9dir(struct stat *lst, struct stat *st, char *name, Dir *d, char **str, char *estr) +{ + char *s; + char tmp[20]; + int sz, fd; + + fd = -1; + USED(fd); + sz = 0; + if(d) + memset(d, 0, sizeof *d); + + /* name */ + s = strrchr(name, '/'); + if(s) + s++; + if(!s || !*s) + s = name; + if(*s == '/') + s++; + if(*s == 0) + s = "/"; + if(d){ + if(*str + strlen(s)+1 > estr) + d->name = "oops"; + else{ + strcpy(*str, s); + d->name = *str; + *str += strlen(*str)+1; + } + } + sz += strlen(s)+1; + + /* user */ + snprint(tmp, sizeof tmp, "%d", (int)st->st_uid); + s = tmp; + sz += strlen(s)+1; + if(d){ + if(*str+strlen(s)+1 > estr) + d->uid = "oops"; + else{ + strcpy(*str, s); + d->uid = *str; + *str += strlen(*str)+1; + } + } + + /* group */ + snprint(tmp, sizeof tmp, "%d", (int)st->st_gid); + s = tmp; + sz += strlen(s)+1; + if(d){ + if(*str + strlen(s)+1 > estr) + d->gid = "oops"; + else{ + strcpy(*str, s); + d->gid = *str; + *str += strlen(*str)+1; + } + } + + if(d){ + d->type = 'M'; + + d->muid = ""; + d->qid.path = ((uvlong)st->st_dev<<32) | st->st_ino; +#ifdef _HAVESTGEN + d->qid.vers = st->st_gen; +#endif + if(d->qid.vers == 0) + d->qid.vers = st->st_mtime + st->st_ctime; + d->mode = st->st_mode&0777; + d->atime = st->st_atime; + d->mtime = st->st_mtime; + d->length = st->st_size; + + if(S_ISDIR(st->st_mode)){ + d->length = 0; + d->mode |= DMDIR; + d->qid.type = QTDIR; + } +#ifdef S_ISLNK + if(S_ISLNK(lst->st_mode)) /* yes, lst not st */ + d->mode |= DMSYMLINK; +#endif + if(S_ISFIFO(st->st_mode)) + d->mode |= DMNAMEDPIPE; +#ifdef S_ISSOCK + if(S_ISSOCK(st->st_mode)) + d->mode |= DMSOCKET; +#endif + if(S_ISBLK(st->st_mode)){ + d->mode |= DMDEVICE; + d->qid.path = ('b'<<16)|st->st_rdev; + } + if(S_ISCHR(st->st_mode)){ + d->mode |= DMDEVICE; + d->qid.path = ('c'<<16)|st->st_rdev; + } + /* fetch real size for disks */ + if(S_ISBLK(st->st_mode) && (fd = open(name, O_RDONLY)) >= 0){ + d->length = 0; + close(fd); + } +#if defined(DIOCGMEDIASIZE) + if(isdisk(st)){ + int fd; + off_t mediasize; + + if((fd = open(name, O_RDONLY)) >= 0){ + if(ioctl(fd, DIOCGMEDIASIZE, &mediasize) >= 0) + d->length = mediasize; + close(fd); + } + } +#elif defined(_HAVEDISKLABEL) + if(isdisk(st)){ + int fd, n; + struct disklabel lab; + + if((fd = open(name, O_RDONLY)) < 0) + goto nosize; + if(ioctl(fd, DIOCGDINFO, &lab) < 0) + goto nosize; + n = minor(st->st_rdev)&7; + if(n >= lab.d_npartitions) + goto nosize; + + d->length = (vlong)(lab.d_partitions[n].p_size) * lab.d_secsize; + + nosize: + if(fd >= 0) + close(fd); + } +#endif + } + + return sz; +} + |