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Prevent potential integer overflow

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PR:		192971
Submitted by:	David Carlier <david.carlier@hardenedbsd.org>
This commit is contained in:
Baptiste Daroussin 2015-07-13 05:56:27 +00:00
parent d3f9e6a743
commit d4bf4151a5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=285437
1 changed files with 6 additions and 2 deletions
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8
bin/ls/ls.c
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@ -158,6 +158,7 @@ main(int argc, char *argv[])
struct winsize win;
int ch, fts_options, notused;
char *p;
const char *errstr = NULL;
#ifdef COLORLS
char termcapbuf[1024]; /* termcap definition buffer */
char tcapbuf[512]; /* capability buffer */
@ -170,7 +171,7 @@ main(int argc, char *argv[])
if (isatty(STDOUT_FILENO)) {
termwidth = 80;
if ((p = getenv("COLUMNS")) != NULL && *p != '\0')
termwidth = atoi(p);
termwidth = strtonum(p, 0, INT_MAX, &errstr);
else if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) != -1 &&
win.ws_col > 0)
termwidth = win.ws_col;
@ -180,9 +181,12 @@ main(int argc, char *argv[])
/* retrieve environment variable, in case of explicit -C */
p = getenv("COLUMNS");
if (p)
termwidth = atoi(p);
termwidth = strtonum(p, 0, INT_MAX, &errstr);
}
if (errstr)
termwidth = 80;
fts_options = FTS_PHYSICAL;
if (getenv("LS_SAMESORT"))
f_samesort = 1;