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contrib/mg/fileio.c
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/* $OpenBSD: fileio.c,v 1.108 2021/03/01 10:51:14 lum Exp $ */ | |||||
/* This file is in the public domain. */ | |||||
/* | |||||
* POSIX fileio.c | |||||
*/ | |||||
#include <sys/queue.h> | |||||
#include <sys/resource.h> | |||||
#include <sys/stat.h> | |||||
#include <sys/time.h> | |||||
#include <sys/types.h> | |||||
#include <sys/wait.h> | |||||
#include <dirent.h> | |||||
#include <errno.h> | |||||
#include <fcntl.h> | |||||
#include <limits.h> | |||||
#include <pwd.h> | |||||
#include <signal.h> | |||||
#include <stdio.h> | |||||
#include <stdlib.h> | |||||
#include <string.h> | |||||
#include <unistd.h> | |||||
#include "def.h" | |||||
#include "kbd.h" | |||||
#include "pathnames.h" | |||||
static char *bkuplocation(const char *); | |||||
static int bkupleavetmp(const char *); | |||||
static char *bkupdir; | |||||
static int leavetmp = 0; /* 1 = leave any '~' files in tmp dir */ | |||||
/* | |||||
* Open a file for reading. | |||||
*/ | |||||
int | |||||
ffropen(FILE ** ffp, const char *fn, struct buffer *bp) | |||||
{ | |||||
if ((*ffp = fopen(fn, "r")) == NULL) { | |||||
if (errno == ENOENT) | |||||
return (FIOFNF); | |||||
return (FIOERR); | |||||
} | |||||
/* If 'fn' is a directory open it with dired. */ | |||||
if (fisdir(fn) == TRUE) | |||||
return (FIODIR); | |||||
ffstat(*ffp, bp); | |||||
return (FIOSUC); | |||||
} | |||||
/* | |||||
* Update stat/dirty info | |||||
*/ | |||||
void | |||||
ffstat(FILE *ffp, struct buffer *bp) | |||||
{ | |||||
struct stat sb; | |||||
if (bp && fstat(fileno(ffp), &sb) == 0) { | |||||
/* set highorder bit to make sure this isn't all zero */ | |||||
bp->b_fi.fi_mode = sb.st_mode | 0x8000; | |||||
bp->b_fi.fi_uid = sb.st_uid; | |||||
bp->b_fi.fi_gid = sb.st_gid; | |||||
bp->b_fi.fi_mtime = sb.st_mtimespec; | |||||
/* Clear the ignore flag */ | |||||
bp->b_flag &= ~(BFIGNDIRTY | BFDIRTY); | |||||
} | |||||
} | |||||
/* | |||||
* Update the status/dirty info. If there is an error, | |||||
* there's not a lot we can do. | |||||
*/ | |||||
int | |||||
fupdstat(struct buffer *bp) | |||||
{ | |||||
FILE *ffp; | |||||
if ((ffp = fopen(bp->b_fname, "r")) == NULL) { | |||||
if (errno == ENOENT) | |||||
return (FIOFNF); | |||||
return (FIOERR); | |||||
} | |||||
ffstat(ffp, bp); | |||||
(void)ffclose(ffp, bp); | |||||
return (FIOSUC); | |||||
} | |||||
/* | |||||
* Open a file for writing. | |||||
*/ | |||||
int | |||||
ffwopen(FILE ** ffp, const char *fn, struct buffer *bp) | |||||
{ | |||||
int fd; | |||||
mode_t fmode = DEFFILEMODE; | |||||
if (bp && bp->b_fi.fi_mode) | |||||
fmode = bp->b_fi.fi_mode & 07777; | |||||
fd = open(fn, O_RDWR | O_CREAT | O_TRUNC, fmode); | |||||
if (fd == -1) { | |||||
ffp = NULL; | |||||
dobeep(); | |||||
ewprintf("Cannot open file for writing : %s", strerror(errno)); | |||||
return (FIOERR); | |||||
} | |||||
if ((*ffp = fdopen(fd, "w")) == NULL) { | |||||
dobeep(); | |||||
ewprintf("Cannot open file for writing : %s", strerror(errno)); | |||||
close(fd); | |||||
return (FIOERR); | |||||
} | |||||
/* | |||||
* If we have file information, use it. We don't bother to check for | |||||
* errors, because there's no a lot we can do about it. Certainly | |||||
* trying to change ownership will fail if we aren't root. That's | |||||
* probably OK. If we don't have info, no need to get it, since any | |||||
* future writes will do the same thing. | |||||
*/ | |||||
if (bp && bp->b_fi.fi_mode) { | |||||
fchmod(fd, bp->b_fi.fi_mode & 07777); | |||||
fchown(fd, bp->b_fi.fi_uid, bp->b_fi.fi_gid); | |||||
} | |||||
return (FIOSUC); | |||||
} | |||||
/* | |||||
* Close a file. | |||||
*/ | |||||
/* ARGSUSED */ | |||||
int | |||||
ffclose(FILE *ffp, struct buffer *bp) | |||||
{ | |||||
if (fclose(ffp) == 0) | |||||
return (FIOSUC); | |||||
return (FIOERR); | |||||
} | |||||
/* | |||||
* Write a buffer to the already opened file. bp points to the | |||||
* buffer. Return the status. | |||||
*/ | |||||
int | |||||
ffputbuf(FILE *ffp, struct buffer *bp, int eobnl) | |||||
{ | |||||
struct line *lp, *lpend; | |||||
lpend = bp->b_headp; | |||||
for (lp = lforw(lpend); lp != lpend; lp = lforw(lp)) { | |||||
if (fwrite(ltext(lp), 1, llength(lp), ffp) != llength(lp)) { | |||||
dobeep(); | |||||
ewprintf("Write I/O error"); | |||||
return (FIOERR); | |||||
} | |||||
if (lforw(lp) != lpend) /* no implied \n on last line */ | |||||
putc(*bp->b_nlchr, ffp); | |||||
} | |||||
if (eobnl) { | |||||
lnewline_at(lback(lpend), llength(lback(lpend))); | |||||
putc(*bp->b_nlchr, ffp); | |||||
} | |||||
return (FIOSUC); | |||||
} | |||||
/* | |||||
* Read a line from a file, and store the bytes | |||||
* in the supplied buffer. Stop on end of file or end of | |||||
* line. When FIOEOF is returned, there is a valid line | |||||
* of data without the normally implied \n. | |||||
* If the line length exceeds nbuf, FIOLONG is returned. | |||||
*/ | |||||
int | |||||
ffgetline(FILE *ffp, char *buf, int nbuf, int *nbytes) | |||||
{ | |||||
int c, i; | |||||
i = 0; | |||||
while ((c = getc(ffp)) != EOF && c != *curbp->b_nlchr) { | |||||
buf[i++] = c; | |||||
if (i >= nbuf) | |||||
return (FIOLONG); | |||||
} | |||||
if (c == EOF && ferror(ffp) != FALSE) { | |||||
dobeep(); | |||||
ewprintf("File read error"); | |||||
return (FIOERR); | |||||
} | |||||
*nbytes = i; | |||||
return (c == EOF ? FIOEOF : FIOSUC); | |||||
} | |||||
/* | |||||
* Make a backup copy of "fname". On Unix the backup has the same | |||||
* name as the original file, with a "~" on the end; this seems to | |||||
* be newest of the new-speak. The error handling is all in "file.c". | |||||
* We do a copy instead of a rename since otherwise another process | |||||
* with an open fd will get the backup, not the new file. This is | |||||
* a problem when using mg with things like crontab and vipw. | |||||
*/ | |||||
int | |||||
fbackupfile(const char *fn) | |||||
{ | |||||
struct stat sb; | |||||
struct timespec new_times[2]; | |||||
int from, to, serrno; | |||||
ssize_t nread; | |||||
char buf[BUFSIZ]; | |||||
char *nname, *tname, *bkpth; | |||||
if (stat(fn, &sb) == -1) { | |||||
dobeep(); | |||||
ewprintf("Can't stat %s : %s", fn, strerror(errno)); | |||||
return (FALSE); | |||||
} | |||||
if ((bkpth = bkuplocation(fn)) == NULL) | |||||
return (FALSE); | |||||
if (asprintf(&nname, "%s~", bkpth) == -1) { | |||||
dobeep(); | |||||
ewprintf("Can't allocate backup file name : %s", strerror(errno)); | |||||
free(bkpth); | |||||
return (ABORT); | |||||
} | |||||
if (asprintf(&tname, "%s.XXXXXXXXXX", bkpth) == -1) { | |||||
dobeep(); | |||||
ewprintf("Can't allocate temp file name : %s", strerror(errno)); | |||||
free(bkpth); | |||||
free(nname); | |||||
return (ABORT); | |||||
} | |||||
free(bkpth); | |||||
if ((from = open(fn, O_RDONLY)) == -1) { | |||||
free(nname); | |||||
free(tname); | |||||
return (FALSE); | |||||
} | |||||
to = mkstemp(tname); | |||||
if (to == -1) { | |||||
serrno = errno; | |||||
close(from); | |||||
free(nname); | |||||
free(tname); | |||||
errno = serrno; | |||||
return (FALSE); | |||||
} | |||||
while ((nread = read(from, buf, sizeof(buf))) > 0) { | |||||
if (write(to, buf, (size_t)nread) != nread) { | |||||
nread = -1; | |||||
break; | |||||
} | |||||
} | |||||
serrno = errno; | |||||
(void) fchmod(to, (sb.st_mode & 0777)); | |||||
/* copy the mtime to the backupfile */ | |||||
new_times[0] = sb.st_atim; | |||||
new_times[1] = sb.st_mtim; | |||||
futimens(to, new_times); | |||||
close(from); | |||||
close(to); | |||||
if (nread == -1) { | |||||
if (unlink(tname) == -1) | |||||
ewprintf("Can't unlink temp : %s", strerror(errno)); | |||||
} else { | |||||
if (rename(tname, nname) == -1) { | |||||
ewprintf("Can't rename temp : %s", strerror(errno)); | |||||
(void) unlink(tname); | |||||
nread = -1; | |||||
} | |||||
} | |||||
free(nname); | |||||
free(tname); | |||||
errno = serrno; | |||||
return (nread == -1 ? FALSE : TRUE); | |||||
} | |||||
/* | |||||
* Convert "fn" to a canonicalized absolute filename, replacing | |||||
* a leading ~/ with the user's home dir, following symlinks, and | |||||
* remove all occurrences of /./ and /../ | |||||
*/ | |||||
char * | |||||
adjustname(const char *fn, int slashslash) | |||||
{ | |||||
static char fnb[PATH_MAX]; | |||||
const char *cp, *ep = NULL; | |||||
char *path; | |||||
if (slashslash == TRUE) { | |||||
cp = fn + strlen(fn) - 1; | |||||
for (; cp >= fn; cp--) { | |||||
if (ep && (*cp == '/')) { | |||||
fn = ep; | |||||
break; | |||||
} | |||||
if (*cp == '/' || *cp == '~') | |||||
ep = cp; | |||||
else | |||||
ep = NULL; | |||||
} | |||||
} | |||||
if ((path = expandtilde(fn)) == NULL) | |||||
return (NULL); | |||||
if (realpath(path, fnb) == NULL) | |||||
(void)strlcpy(fnb, path, sizeof(fnb)); | |||||
free(path); | |||||
return (fnb); | |||||
} | |||||
/* | |||||
* Find a startup file for the user and return its name. As a service | |||||
* to other pieces of code that may want to find a startup file (like | |||||
* the terminal driver in particular), accepts a suffix to be appended | |||||
* to the startup file name. | |||||
*/ | |||||
char * | |||||
startupfile(char *suffix, char *conffile) | |||||
{ | |||||
static char file[NFILEN]; | |||||
char *home; | |||||
int ret; | |||||
if ((home = getenv("HOME")) == NULL || *home == '\0') | |||||
goto nohome; | |||||
if (conffile != NULL) { | |||||
(void)strncpy(file, conffile, NFILEN); | |||||
} else if (suffix == NULL) { | |||||
ret = snprintf(file, sizeof(file), _PATH_MG_STARTUP, home); | |||||
if (ret < 0 || ret >= sizeof(file)) | |||||
return (NULL); | |||||
} else { | |||||
ret = snprintf(file, sizeof(file), _PATH_MG_TERM, home, suffix); | |||||
if (ret < 0 || ret >= sizeof(file)) | |||||
return (NULL); | |||||
} | |||||
if (access(file, R_OK) == 0) | |||||
return (file); | |||||
nohome: | |||||
#ifdef STARTUPFILE | |||||
if (suffix == NULL) { | |||||
ret = snprintf(file, sizeof(file), "%s", STARTUPFILE); | |||||
if (ret < 0 || ret >= sizeof(file)) | |||||
return (NULL); | |||||
} else { | |||||
ret = snprintf(file, sizeof(file), "%s%s", STARTUPFILE, | |||||
suffix); | |||||
if (ret < 0 || ret >= sizeof(file)) | |||||
return (NULL); | |||||
} | |||||
if (access(file, R_OK) == 0) | |||||
return (file); | |||||
#endif /* STARTUPFILE */ | |||||
return (NULL); | |||||
} | |||||
int | |||||
copy(char *frname, char *toname) | |||||
{ | |||||
int ifd, ofd; | |||||
char buf[BUFSIZ]; | |||||
mode_t fmode = DEFFILEMODE; /* XXX?? */ | |||||
struct stat orig; | |||||
ssize_t sr; | |||||
if ((ifd = open(frname, O_RDONLY)) == -1) | |||||
return (FALSE); | |||||
if (fstat(ifd, &orig) == -1) { | |||||
dobeep(); | |||||
ewprintf("fstat: %s", strerror(errno)); | |||||
close(ifd); | |||||
return (FALSE); | |||||
} | |||||
if ((ofd = open(toname, O_WRONLY|O_CREAT|O_TRUNC, fmode)) == -1) { | |||||
close(ifd); | |||||
return (FALSE); | |||||
} | |||||
while ((sr = read(ifd, buf, sizeof(buf))) > 0) { | |||||
if (write(ofd, buf, (size_t)sr) != sr) { | |||||
ewprintf("write error : %s", strerror(errno)); | |||||
break; | |||||
} | |||||
} | |||||
if (fchmod(ofd, orig.st_mode) == -1) | |||||
ewprintf("Cannot set original mode : %s", strerror(errno)); | |||||
if (sr == -1) { | |||||
ewprintf("Read error : %s", strerror(errno)); | |||||
close(ifd); | |||||
close(ofd); | |||||
return (FALSE); | |||||
} | |||||
/* | |||||
* It is "normal" for this to fail since we can't guarantee that | |||||
* we will be running as root. | |||||
*/ | |||||
if (fchown(ofd, orig.st_uid, orig.st_gid) && errno != EPERM) | |||||
ewprintf("Cannot set owner : %s", strerror(errno)); | |||||
(void) close(ifd); | |||||
(void) close(ofd); | |||||
return (TRUE); | |||||
} | |||||
/* | |||||
* return list of file names that match the name in buf. | |||||
*/ | |||||
struct list * | |||||
make_file_list(char *buf) | |||||
{ | |||||
char *dir, *file, *cp; | |||||
size_t len, preflen; | |||||
int ret; | |||||
DIR *dirp; | |||||
struct dirent *dent; | |||||
struct list *last, *current; | |||||
char fl_name[NFILEN + 2]; | |||||
char prefixx[NFILEN + 1]; | |||||
/* | |||||
* We need three different strings: | |||||
* dir - the name of the directory containing what the user typed. | |||||
* Must be a real unix file name, e.g. no ~user, etc.. | |||||
* Must not end in /. | |||||
* prefix - the portion of what the user typed that is before the | |||||
* names we are going to find in the directory. Must have a | |||||
* trailing / if the user typed it. | |||||
* names from the directory - We open dir, and return prefix | |||||
* concatenated with names. | |||||
*/ | |||||
/* first we get a directory name we can look up */ | |||||
/* | |||||
* Names ending in . are potentially odd, because adjustname will | |||||
* treat foo/bar/.. as a foo/, whereas we are | |||||
* interested in names starting with .. | |||||
*/ | |||||
len = strlen(buf); | |||||
if (len && buf[len - 1] == '.') { | |||||
buf[len - 1] = 'x'; | |||||
dir = adjustname(buf, TRUE); | |||||
buf[len - 1] = '.'; | |||||
} else | |||||
dir = adjustname(buf, TRUE); | |||||
if (dir == NULL) | |||||
return (NULL); | |||||
/* | |||||
* If the user typed a trailing / or the empty string | |||||
* he wants us to use his file spec as a directory name. | |||||
*/ | |||||
if (len && buf[len - 1] != '/') { | |||||
file = strrchr(dir, '/'); | |||||
if (file) { | |||||
*file = '\0'; | |||||
if (*dir == '\0') | |||||
dir = "/"; | |||||
} else | |||||
return (NULL); | |||||
} | |||||
/* Now we get the prefix of the name the user typed. */ | |||||
if (strlcpy(prefixx, buf, sizeof(prefixx)) >= sizeof(prefixx)) | |||||
return (NULL); | |||||
cp = strrchr(prefixx, '/'); | |||||
if (cp == NULL) | |||||
prefixx[0] = '\0'; | |||||
else | |||||
cp[1] = '\0'; | |||||
preflen = strlen(prefixx); | |||||
/* cp is the tail of buf that really needs to be compared. */ | |||||
cp = buf + preflen; | |||||
len = strlen(cp); | |||||
/* | |||||
* Now make sure that file names will fit in the buffers allocated. | |||||
* SV files are fairly short. For BSD, something more general would | |||||
* be required. | |||||
*/ | |||||
if (preflen > NFILEN - NAME_MAX) | |||||
return (NULL); | |||||
/* loop over the specified directory, making up the list of files */ | |||||
/* | |||||
* Note that it is worth our time to filter out names that don't | |||||
* match, even though our caller is going to do so again, and to | |||||
* avoid doing the stat if completion is being done, because stat'ing | |||||
* every file in the directory is relatively expensive. | |||||
*/ | |||||
dirp = opendir(dir); | |||||
if (dirp == NULL) | |||||
return (NULL); | |||||
last = NULL; | |||||
while ((dent = readdir(dirp)) != NULL) { | |||||
int isdir; | |||||
if (strncmp(cp, dent->d_name, len) != 0) | |||||
continue; | |||||
isdir = 0; | |||||
if (dent->d_type == DT_DIR) { | |||||
isdir = 1; | |||||
} else if (dent->d_type == DT_LNK || | |||||
dent->d_type == DT_UNKNOWN) { | |||||
struct stat statbuf; | |||||
if (fstatat(dirfd(dirp), dent->d_name, &statbuf, 0) < 0) | |||||
continue; | |||||
if (S_ISDIR(statbuf.st_mode)) | |||||
isdir = 1; | |||||
} | |||||
if ((current = malloc(sizeof(struct list))) == NULL) { | |||||
free_file_list(last); | |||||
closedir(dirp); | |||||
return (NULL); | |||||
} | |||||
ret = snprintf(fl_name, sizeof(fl_name), | |||||
"%s%s%s", prefixx, dent->d_name, isdir ? "/" : ""); | |||||
if (ret < 0 || ret >= sizeof(fl_name)) { | |||||
free(current); | |||||
continue; | |||||
} | |||||
current->l_next = last; | |||||
current->l_name = strdup(fl_name); | |||||
last = current; | |||||
} | |||||
closedir(dirp); | |||||
return (last); | |||||
} | |||||
/* | |||||
* Test if a supplied filename refers to a directory | |||||
* Returns ABORT on error, TRUE if directory. FALSE otherwise | |||||
*/ | |||||
int | |||||
fisdir(const char *fname) | |||||
{ | |||||
struct stat statbuf; | |||||
if (stat(fname, &statbuf) != 0) | |||||
return (ABORT); | |||||
if (S_ISDIR(statbuf.st_mode)) | |||||
return (TRUE); | |||||
return (FALSE); | |||||
} | |||||
/* | |||||
* Check the mtime of the supplied filename. | |||||
* Return TRUE if last mtime matches, FALSE if not, | |||||
* If the stat fails, return TRUE and try the save anyway | |||||
*/ | |||||
int | |||||
fchecktime(struct buffer *bp) | |||||
{ | |||||
struct stat sb; | |||||
if (stat(bp->b_fname, &sb) == -1) | |||||
return (TRUE); | |||||
if (bp->b_fi.fi_mtime.tv_sec != sb.st_mtimespec.tv_sec || | |||||
bp->b_fi.fi_mtime.tv_nsec != sb.st_mtimespec.tv_nsec) | |||||
return (FALSE); | |||||
return (TRUE); | |||||
} | |||||
/* | |||||
* Location of backup file. This function creates the correct path. | |||||
*/ | |||||
static char * | |||||
bkuplocation(const char *fn) | |||||
{ | |||||
struct stat sb; | |||||
char *ret; | |||||
if (bkupdir != NULL && (stat(bkupdir, &sb) == 0) && | |||||
S_ISDIR(sb.st_mode) && !bkupleavetmp(fn)) { | |||||
char fname[NFILEN]; | |||||
const char *c; | |||||
int i = 0, len; | |||||
c = fn; | |||||
len = strlen(bkupdir); | |||||
while (*c != '\0') { | |||||
/* Make sure we don't go over combined: | |||||
* strlen(bkupdir + '/' + fname + '\0') | |||||
*/ | |||||
if (i >= NFILEN - len - 1) | |||||
return (NULL); | |||||
if (*c == '/') { | |||||
fname[i] = '!'; | |||||
} else if (*c == '!') { | |||||
if (i >= NFILEN - len - 2) | |||||
return (NULL); | |||||
fname[i++] = '!'; | |||||
fname[i] = '!'; | |||||
} else | |||||
fname[i] = *c; | |||||
i++; | |||||
c++; | |||||
} | |||||
fname[i] = '\0'; | |||||
if (asprintf(&ret, "%s/%s", bkupdir, fname) == -1) | |||||
return (NULL); | |||||
} else if ((ret = strndup(fn, NFILEN)) == NULL) | |||||
return (NULL); | |||||
return (ret); | |||||
} | |||||
int | |||||
backuptohomedir(int f, int n) | |||||
{ | |||||
const char *c = _PATH_MG_DIR; | |||||
char *p; | |||||
if (bkupdir == NULL) { | |||||
p = adjustname(c, TRUE); | |||||
bkupdir = strndup(p, NFILEN); | |||||
if (bkupdir == NULL) | |||||
return(FALSE); | |||||
if (mkdir(bkupdir, 0700) == -1 && errno != EEXIST) { | |||||
free(bkupdir); | |||||
bkupdir = NULL; | |||||
} | |||||
} else { | |||||
free(bkupdir); | |||||
bkupdir = NULL; | |||||
} | |||||
return (TRUE); | |||||
} | |||||
/* | |||||
* For applications that use mg as the editor and have a desire to keep | |||||
* '~' files in /tmp, toggle the location: /tmp | ~/.mg.d | |||||
*/ | |||||
int | |||||
toggleleavetmp(int f, int n) | |||||
{ | |||||
leavetmp = !leavetmp; | |||||
return (TRUE); | |||||
} | |||||
/* | |||||
* Returns TRUE if fn is located in the temp directory and we want to save | |||||
* those backups there. | |||||
*/ | |||||
int | |||||
bkupleavetmp(const char *fn) | |||||
{ | |||||
if (!leavetmp) | |||||
return(FALSE); | |||||
if (strncmp(fn, "/tmp", 4) == 0) | |||||
return (TRUE); | |||||
return (FALSE); | |||||
} | |||||
/* | |||||
* Expand file names beginning with '~' if appropriate: | |||||
* 1, if ./~fn exists, continue without expanding tilde. | |||||
* 2, else, if username 'fn' exists, expand tilde with home directory path. | |||||
* 3, otherwise, continue and create new buffer called ~fn. | |||||
*/ | |||||
char * | |||||
expandtilde(const char *fn) | |||||
{ | |||||
struct passwd *pw; | |||||
struct stat statbuf; | |||||
const char *cp; | |||||
char user[LOGIN_NAME_MAX], path[NFILEN]; | |||||
char *ret; | |||||
size_t ulen, plen; | |||||
path[0] = '\0'; | |||||
if (fn[0] != '~' || stat(fn, &statbuf) == 0) { | |||||
if ((ret = strndup(fn, NFILEN)) == NULL) | |||||
return (NULL); | |||||
return(ret); | |||||
} | |||||
cp = strchr(fn, '/'); | |||||
if (cp == NULL) | |||||
cp = fn + strlen(fn); /* point to the NUL byte */ | |||||
ulen = cp - &fn[1]; | |||||
if (ulen >= sizeof(user)) { | |||||
if ((ret = strndup(fn, NFILEN)) == NULL) | |||||
return (NULL); | |||||
return(ret); | |||||
} | |||||
if (ulen == 0) /* ~/ or ~ */ | |||||
pw = getpwuid(geteuid()); | |||||
else { /* ~user/ or ~user */ | |||||
memcpy(user, &fn[1], ulen); | |||||
user[ulen] = '\0'; | |||||
pw = getpwnam(user); | |||||
} | |||||
if (pw != NULL) { | |||||
plen = strlcpy(path, pw->pw_dir, sizeof(path)); | |||||
if (plen == 0 || path[plen - 1] != '/') { | |||||
if (strlcat(path, "/", sizeof(path)) >= sizeof(path)) { | |||||
dobeep(); | |||||
ewprintf("Path too long"); | |||||
return (NULL); | |||||
} | |||||
} | |||||
fn = cp; | |||||
if (*fn == '/') | |||||
fn++; | |||||
} | |||||
if (strlcat(path, fn, sizeof(path)) >= sizeof(path)) { | |||||
dobeep(); | |||||
ewprintf("Path too long"); | |||||
return (NULL); | |||||
} | |||||
if ((ret = strndup(path, NFILEN)) == NULL) | |||||
return (NULL); | |||||
return (ret); | |||||
} |