version 1.6, 1995/02/27 10:18:54 |
version 1.39, 2001/10/31 21:52:17 |
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* SUCH DAMAGE. |
* SUCH DAMAGE. |
*/ |
*/ |
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#include <sys/cdefs.h> |
#ifndef lint |
#ifndef lint |
#if 0 |
#if 0 |
static char sccsid[] = "@(#)termcap.c 8.1 (Berkeley) 6/4/93"; |
static char sccsid[] = "@(#)termcap.c 8.1 (Berkeley) 6/4/93"; |
#else |
#else |
static char rcsid[] = "$NetBSD$"; |
__RCSID("$NetBSD$"); |
#endif |
#endif |
#endif /* not lint */ |
#endif /* not lint */ |
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#define PBUFSIZ 512 /* max length of filename path */ |
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#define PVECSIZ 32 /* max number of names in path */ |
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#include <stdio.h> |
#include <sys/types.h> |
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#include <sys/param.h> |
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#include <assert.h> |
#include <ctype.h> |
#include <ctype.h> |
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#include <stdio.h> |
#include <stdlib.h> |
#include <stdlib.h> |
#include <string.h> |
#include <string.h> |
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#include <termcap.h> |
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#include <errno.h> |
#include "pathnames.h" |
#include "pathnames.h" |
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#include "termcap_private.h" |
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#define PBUFSIZ MAXPATHLEN /* max length of filename path */ |
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#define PVECSIZ 32 /* max number of names in path */ |
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/* |
/* |
* termcap - routines for dealing with the terminal capability data base |
* termcap - routines for dealing with the terminal capability data base |
Line 65 static char rcsid[] = "$NetBSD$"; |
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Line 73 static char rcsid[] = "$NetBSD$"; |
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*/ |
*/ |
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static char *tbuf; /* termcap buffer */ |
static char *tbuf; /* termcap buffer */ |
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static struct tinfo *fbuf; /* untruncated termcap buffer */ |
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/* |
/* |
* Get an entry for terminal name in buffer bp from the termcap file. |
* Set the termcap entry to the arbitrary string passed in, this can |
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* be used to provide a "dummy" termcap entry if a real one does not |
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* exist. This function will malloc the buffer and space for the |
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* string. If an error occurs return -1 otherwise return 0. |
*/ |
*/ |
int |
int |
tgetent(bp, name) |
t_setinfo(struct tinfo **bp, const char *entry) |
char *bp, *name; |
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{ |
{ |
register char *p; |
char capability[256], *cap_ptr; |
register char *cp; |
size_t limit; |
char *dummy; |
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_DIAGASSERT(bp != NULL); |
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_DIAGASSERT(entry != NULL); |
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if ((*bp = malloc(sizeof(struct tinfo))) == NULL) |
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return -1; |
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if (((*bp)->info = (char *) malloc(strlen(entry) + 1)) == NULL) |
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return -1; |
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strcpy((*bp)->info, entry); |
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cap_ptr = capability; |
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limit = 255; |
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(*bp)->up = t_getstr(*bp, "up", &cap_ptr, &limit); |
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if ((*bp)->up) |
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(*bp)->up = strdup((*bp)->up); |
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cap_ptr = capability; |
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limit = 255; |
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(*bp)->bc = t_getstr(*bp, "bc", &cap_ptr, &limit); |
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if ((*bp)->bc) |
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(*bp)->bc = strdup((*bp)->bc); |
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return 0; |
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} |
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/* |
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* Get an extended entry for the terminal name. This differs from |
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* tgetent only in a) the buffer is malloc'ed for the caller and |
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* b) the termcap entry is not truncated to 1023 characters. |
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*/ |
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int |
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t_getent(bp, name) |
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struct tinfo **bp; |
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const char *name; |
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{ |
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char *p; |
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char *cp; |
char **fname; |
char **fname; |
char *home; |
char *home; |
int i; |
int i, did_getset; |
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size_t limit; |
char pathbuf[PBUFSIZ]; /* holds raw path of filenames */ |
char pathbuf[PBUFSIZ]; /* holds raw path of filenames */ |
char *pathvec[PVECSIZ]; /* to point to names in pathbuf */ |
char *pathvec[PVECSIZ]; /* to point to names in pathbuf */ |
char **pvec; /* holds usable tail of path vector */ |
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char *termpath; |
char *termpath; |
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char capability[256], *cap_ptr; |
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_DIAGASSERT(bp != NULL); |
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_DIAGASSERT(name != NULL); |
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if ((*bp = malloc(sizeof(struct tinfo))) == NULL) return 0; |
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fname = pathvec; |
fname = pathvec; |
pvec = pathvec; |
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tbuf = bp; |
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p = pathbuf; |
p = pathbuf; |
cp = getenv("TERMCAP"); |
cp = getenv("TERMCAP"); |
/* |
/* |
* TERMCAP can have one of two things in it. It can be the |
* TERMCAP can have one of two things in it. It can be the |
* name of a file to use instead of /etc/termcap. In this |
* name of a file to use instead of |
* case it better start with a "/". Or it can be an entry to |
* /usr/share/misc/termcap. In this case it better start with |
* use so we don't have to read the file. In this case it |
* a "/". Or it can be an entry to use so we don't have to |
* has to already have the newlines crunched out. If TERMCAP |
* read the file. In this case cgetset() withh crunch out the |
* does not hold a file name then a path of names is searched |
* newlines. If TERMCAP does not hold a file name then a path |
* instead. The path is found in the TERMPATH variable, or |
* of names is searched instead. The path is found in the |
* becomes "$HOME/.termcap /etc/termcap" if no TERMPATH exists. |
* TERMPATH variable, or becomes _PATH_DEF ("$HOME/.termcap |
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* /usr/share/misc/termcap") if no TERMPATH exists. |
*/ |
*/ |
if (!cp || *cp != '/') { /* no TERMCAP or it holds an entry */ |
if (!cp || *cp != '/') { /* no TERMCAP or it holds an entry */ |
if (termpath = getenv("TERMPATH")) |
if ((termpath = getenv("TERMPATH")) != NULL) |
strncpy(pathbuf, termpath, PBUFSIZ); |
(void)strlcpy(pathbuf, termpath, sizeof(pathbuf)); |
else { |
else { |
if (home = getenv("HOME")) { /* set up default */ |
if ((home = getenv("HOME")) != NULL) { |
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/* set up default */ |
p += strlen(home); /* path, looking in */ |
p += strlen(home); /* path, looking in */ |
strcpy(pathbuf, home); /* $HOME first */ |
(void)strlcpy(pathbuf, home, |
*p++ = '/'; |
sizeof(pathbuf)); /* $HOME first */ |
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if ((p - pathbuf) < sizeof(pathbuf) - 1) |
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*p++ = '/'; |
} /* if no $HOME look in current directory */ |
} /* if no $HOME look in current directory */ |
strncpy(p, _PATH_DEF, PBUFSIZ - (p - pathbuf)); |
if ((p - pathbuf) < sizeof(pathbuf) - 1) { |
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(void)strlcpy(p, _PATH_DEF, |
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sizeof(pathbuf) - (p - pathbuf)); |
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} |
} |
} |
} |
} |
else /* user-defined name in TERMCAP */ |
else { |
strncpy(pathbuf, cp, PBUFSIZ); /* still can be tokenized */ |
/* user-defined name in TERMCAP; still can be tokenized */ |
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(void)strlcpy(pathbuf, cp, sizeof(pathbuf)); |
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} |
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*fname++ = pathbuf; /* tokenize path into vector of names */ |
*fname++ = pathbuf; /* tokenize path into vector of names */ |
while (*++p) |
while (*++p) |
Line 129 tgetent(bp, name) |
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Line 192 tgetent(bp, name) |
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break; |
break; |
} |
} |
} |
} |
*fname = (char *) 0; /* mark end of vector */ |
*fname = NULL; /* mark end of vector */ |
if (cp && *cp && *cp != '/') |
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/* |
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* try ignoring TERMCAP if it has a ZZ in it, we do this |
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* because a TERMCAP with ZZ in it indicates the entry has been |
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* exported by another program using the "old" interface, the |
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* termcap entry has been truncated and ZZ points to an address |
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* in the exporting programs memory space which is of no use |
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* here - anyone who is exporting the termcap entry and then |
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* reading it back again in the same program deserves to be |
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* taken out, beaten up, dragged about, shot and then hurt some |
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* more. |
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*/ |
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did_getset = 0; |
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if (cp && *cp && *cp != '/' && strstr(cp, ":ZZ") == NULL) { |
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did_getset = 1; |
if (cgetset(cp) < 0) |
if (cgetset(cp) < 0) |
return (-2); |
return (-2); |
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} |
dummy = NULL; |
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i = cgetent(&dummy, pathvec, name); |
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if (i == 0) |
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strcpy(bp, dummy); |
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if (dummy) |
/* |
free(dummy); |
* XXX potential security hole here in a set-id program if the |
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* user had setup name to be built from a path they can not |
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* normally read. |
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*/ |
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(*bp)->info = NULL; |
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i = cgetent(&((*bp)->info), pathvec, name); |
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/* |
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* if we get an error and we skipped doing the cgetset before |
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* we try with TERMCAP in place - we may be using a truncated |
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* termcap entry but what else can one do? |
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*/ |
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if ((i < 0) && (did_getset == 0)) { |
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if (cp && *cp && *cp != '/') |
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if (cgetset(cp) < 0) |
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return (-2); |
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i = cgetent(&((*bp)->info), pathvec, name); |
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} |
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/* no tc reference loop return code in libterm XXX */ |
/* no tc reference loop return code in libterm XXX */ |
if (i == -3) |
if (i == -3) |
return (-1); |
return (-1); |
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/* fill in t_goto capabilities - this prevents memory leaks |
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* and is more efficient than fetching these capabilities |
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* every time t_goto is called. |
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*/ |
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if (i >= 0) { |
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cap_ptr = capability; |
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limit = 255; |
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(*bp)->up = t_getstr(*bp, "up", &cap_ptr, &limit); |
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if ((*bp)->up) |
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(*bp)->up = strdup((*bp)->up); |
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cap_ptr = capability; |
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limit = 255; |
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(*bp)->bc = t_getstr(*bp, "bc", &cap_ptr, &limit); |
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if ((*bp)->bc) |
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(*bp)->bc = strdup((*bp)->bc); |
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} |
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return (i + 1); |
return (i + 1); |
} |
} |
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/* |
/* |
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* Get an entry for terminal name in buffer bp from the termcap file. |
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*/ |
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int |
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tgetent(bp, name) |
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char *bp; |
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const char *name; |
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{ |
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int i, plen, elen, c; |
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char *ptrbuf = NULL; |
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i = t_getent(&fbuf, name); |
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if (i == 1) { |
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/* |
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* stash the full buffer pointer as the ZZ capability |
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* in the termcap buffer passed. |
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*/ |
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plen = asprintf(&ptrbuf, ":ZZ=%p", fbuf->info); |
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(void)strlcpy(bp, fbuf->info, 1024); |
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elen = strlen(bp); |
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/* |
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* backup over the entry if the addition of the full |
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* buffer pointer will overflow the buffer passed. We |
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* want to truncate the termcap entry on a capability |
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* boundary. |
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*/ |
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if ((elen + plen) > 1023) { |
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bp[1023 - plen] = '\0'; |
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for (c = (elen - plen); c > 0; c--) { |
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if (bp[c] == ':') { |
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bp[c] = '\0'; |
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break; |
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} |
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} |
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} |
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strcat(bp, ptrbuf); |
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tbuf = bp; |
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} |
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return i; |
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} |
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/* |
* Return the (numeric) option id. |
* Return the (numeric) option id. |
* Numeric options look like |
* Numeric options look like |
* li#80 |
* li#80 |
Line 157 tgetent(bp, name) |
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Line 309 tgetent(bp, name) |
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* Note that we handle octal numbers beginning with 0. |
* Note that we handle octal numbers beginning with 0. |
*/ |
*/ |
int |
int |
tgetnum(id) |
t_getnum(info, id) |
char *id; |
struct tinfo *info; |
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const char *id; |
{ |
{ |
long num; |
long num; |
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if (cgetnum(tbuf, id, &num) == 0) |
_DIAGASSERT(info != NULL); |
return (num); |
_DIAGASSERT(id != NULL); |
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if (cgetnum(info->info, id, &num) == 0) |
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return (int)(num); |
else |
else |
return (-1); |
return (-1); |
} |
} |
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int |
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tgetnum(id) |
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const char *id; |
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{ |
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return t_getnum(fbuf, id); |
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} |
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/* |
/* |
* Handle a flag option. |
* Handle a flag option. |
* Flag options are given "naked", i.e. followed by a : or the end |
* Flag options are given "naked", i.e. followed by a : or the end |
* of the buffer. Return 1 if we find the option, or 0 if it is |
* of the buffer. Return 1 if we find the option, or 0 if it is |
* not given. |
* not given. |
*/ |
*/ |
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int t_getflag(info, id) |
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struct tinfo *info; |
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const char *id; |
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{ |
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_DIAGASSERT(info != NULL); |
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_DIAGASSERT(id != NULL); |
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return (cgetcap(info->info, id, ':') != NULL); |
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} |
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int |
int |
tgetflag(id) |
tgetflag(id) |
char *id; |
const char *id; |
{ |
{ |
return (cgetcap(tbuf, id, ':') != NULL); |
return t_getflag(fbuf, id); |
} |
} |
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/* |
/* |
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* cl=^Z |
* cl=^Z |
* Much decoding is done on the strings, and the strings are |
* Much decoding is done on the strings, and the strings are |
* placed in area, which is a ref parameter which is updated. |
* placed in area, which is a ref parameter which is updated. |
* No checking on area overflow. |
* limit is the number of characters allowed to be put into |
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* area, this is updated. |
*/ |
*/ |
char * |
char * |
tgetstr(id, area) |
t_getstr(info, id, area, limit) |
char *id, **area; |
struct tinfo *info; |
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const char *id; |
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char **area; |
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size_t *limit; |
{ |
{ |
char ids[3]; |
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char *s; |
char *s; |
int i; |
int i; |
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_DIAGASSERT(info != NULL); |
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_DIAGASSERT(id != NULL); |
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/* area may be NULL */ |
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if ((i = cgetstr(info->info, id, &s)) < 0) { |
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errno = ENOENT; |
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if ((area == NULL) && (limit != NULL)) |
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*limit = 0; |
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return NULL; |
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} |
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if (area != NULL) { |
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/* |
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* check if there is room for the new entry to be put into |
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* area |
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*/ |
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if (limit != NULL && (*limit < i)) { |
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errno = E2BIG; |
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free(s); |
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return NULL; |
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} |
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(void)strcpy(*area, s); |
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free(s); |
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s = *area; |
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*area += i + 1; |
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if (limit != NULL) *limit -= i; |
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return (s); |
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} else { |
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_DIAGASSERT(limit != NULL); |
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*limit = i; |
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free(s); |
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return NULL; |
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} |
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} |
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/* |
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* Get a string valued option. |
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* These are given as |
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* cl=^Z |
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* Much decoding is done on the strings, and the strings are |
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* placed in area, which is a ref parameter which is updated. |
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* No checking on area overflow. |
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*/ |
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char * |
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tgetstr(id, area) |
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const char *id; |
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char **area; |
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{ |
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struct tinfo dummy; |
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char ids[3]; |
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_DIAGASSERT(id != NULL); |
/* |
/* |
* XXX |
* XXX |
* This is for all the boneheaded programs that relied on tgetstr |
* This is for all the boneheaded programs that relied on tgetstr |
* to look only at the first 2 characters of the string passed... |
* to look only at the first 2 characters of the string passed... |
*/ |
*/ |
*ids = *id; |
ids[0] = id[0]; |
ids[1] = id[1]; |
ids[1] = id[1]; |
ids[2] = '\0'; |
ids[2] = '\0'; |
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if ((i = cgetstr(tbuf, ids, &s)) < 0) |
if ((id[0] == 'Z') && (id[1] == 'Z')) { |
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dummy.info = tbuf; |
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return t_getstr(&dummy, ids, area, NULL); |
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} |
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else |
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return t_getstr(fbuf, ids, area, NULL); |
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} |
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/* |
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* Get a string valued option specified by id and append it to the |
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* given buffer. If bufptr is NULL then a new buffer is allocated, if |
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* bufptr is non-NULL then extend the memory allocation to allow the |
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* new string to be appended to the buffer. The pointer area is |
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* updated to point to the start of the new entry and this address is |
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* also returned to the caller. If the string is not found or a |
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* memory allocation fails then NULL is returned and bufptr and area |
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* are unchanged. |
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* |
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* XXX: This is horribly broken because realloc's can move memory and |
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* invalidate attributes we've already returned. Only possible way to |
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* fix it for now is to allocate a lot -- 8K, and leak if we need to |
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* realloc. This API needs to be destroyed!. |
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*/ |
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#define BSIZE 8192 |
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char * |
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t_agetstr(struct tinfo *info, const char *id, char **bufptr, char **area) |
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{ |
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size_t new_size; |
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char *new_buf; |
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_DIAGASSERT(info != NULL); |
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_DIAGASSERT(id != NULL); |
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_DIAGASSERT(bufptr != NULL); |
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_DIAGASSERT(area != NULL); |
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t_getstr(info, id, NULL, &new_size); |
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/* either the string is empty or the capability does not exist. */ |
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if (new_size == 0 || new_size > BSIZE) |
return NULL; |
return NULL; |
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/* check if we have a buffer, if not malloc one and fill it in. */ |
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if (*bufptr == NULL) { |
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if ((new_buf = (char *) malloc(BSIZE)) == NULL) |
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return NULL; |
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*bufptr = new_buf; |
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*area = new_buf; |
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} else if (*area - *bufptr >= BSIZE - new_size) { |
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char buf[BSIZE]; |
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char *b = buf; |
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size_t len = BSIZE; |
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/* Leak! */ |
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return strdup(t_getstr(info, id, &b, &len)); |
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} |
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return t_getstr(info, id, area, NULL); |
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} |
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/* |
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* Free the buffer allocated by t_getent |
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* |
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*/ |
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void |
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t_freent(info) |
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struct tinfo *info; |
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{ |
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_DIAGASSERT(info != NULL); |
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free(info->info); |
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if (info->up != NULL) |
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free(info->up); |
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if (info->bc != NULL) |
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free(info->bc); |
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free(info); |
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} |
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/* |
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* Get the terminal name string from the termcap entry. |
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* |
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*/ |
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int |
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t_getterm(info, area, limit) |
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struct tinfo *info; |
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char **area; |
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size_t *limit; |
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{ |
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char *endp; |
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size_t count; |
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_DIAGASSERT(info != NULL); |
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if ((endp = strchr(info->info, ':')) == NULL) { |
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errno = EINVAL; |
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return -1; |
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} |
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strcpy(*area, s); |
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*area += i + 1; |
count = endp - info->info + 1; |
return (s); |
if (area == NULL) { |
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_DIAGASSERT(limit != NULL); |
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*limit = count; |
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return 0; |
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} else { |
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if ((limit != NULL) && (count > *limit)) { |
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errno = E2BIG; |
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return -1; |
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} |
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(void)strlcpy(*area, info->info, count); |
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if (limit != NULL) |
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*limit -= count; |
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} |
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return 0; |
} |
} |