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ed: Use strlcpy() instead of strcpy() and other minor things 

Based on contribution by Ali H. Fardan, thanks!
This commit is contained in:
Laslo Hunhold 2016-12-27 13:07:02 +01:00
parent 370e0ae675
commit e2f886c7e2
1 changed files with 11 additions and 7 deletions
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18
ed.c
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@ -322,7 +322,7 @@ inject(char *s, int j)
} }
static void static void
clearbuf() clearbuf(void)
{ {
if (scratch) if (scratch)
close(scratch); close(scratch);
@ -334,7 +334,7 @@ clearbuf()
} }
static void static void
setscratch() setscratch(void)
{ {
int r, k; int r, k;
char *dir; char *dir;
@ -421,6 +421,7 @@ rematch(int num)
lastmatch += off; lastmatch += off;
return 1; return 1;
} }
return 0; return 0;
} }
@ -547,7 +548,7 @@ invalid:
} }
static void static void
getlst() getlst(void)
{ {
int ln, c; int ln, c;
@ -595,7 +596,7 @@ deflines(int def1, int def2)
} }
static void static void
dowrite(char *fname, int trunc) dowrite(const char *fname, int trunc)
{ {
FILE *fp; FILE *fp;
int i, line; int i, line;
@ -610,13 +611,14 @@ dowrite(char *fname, int trunc)
curln = line2; curln = line2;
if (fclose(fp)) if (fclose(fp))
error("input/output error"); error("input/output error");
strcpy(savfname, fname); if (strlcpy(savfname, fname, sizeof(savfname)) >= sizeof(savfname))
error("file name too long");
modflag = 0; modflag = 0;
curln = line; curln = line;
} }
static void static void
doread(char *fname) doread(const char *fname)
{ {
size_t cnt; size_t cnt;
ssize_t n; ssize_t n;
@ -741,9 +743,11 @@ getfname(char comm)
} else { } else {
*bp = '\0'; *bp = '\0';
if (savfname[0] == '\0' || comm == 'e' || comm == 'f') if (savfname[0] == '\0' || comm == 'e' || comm == 'f')
strcpy(savfname, fname); if (strlcpy(savfname, fname, sizeof(savfname)) >= sizeof(savfname))
error("file name too long");
return fname; return fname;
} }
return NULL; /* not reached */ return NULL; /* not reached */
} }