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part 2: don’t stop using the history if the file has been truncated

This commit is contained in:
tg 2017-08-07 20:43:00 +00:00
parent bfa79a4e4b
commit c203e7c5b2
1 changed files with 6 additions and 5 deletions
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11
histrap.c
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@ -27,7 +27,7 @@
#include <sys/file.h>
#endif
__RCSID("$MirOS: src/bin/mksh/histrap.c,v 1.163 2017/08/07 20:40:57 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/histrap.c,v 1.164 2017/08/07 20:43:00 tg Exp $");
Trap sigtraps[ksh_NSIG + 1];
static struct sigaction Sigact_ign;
@ -963,10 +963,11 @@ writehistfile(int lno, const char *cmd)
mksh_lockfd(histfd);
sizenow = lseek(histfd, (off_t)0, SEEK_END);
if (sizenow < histfsize) {
/* the file has shrunk; give up */
goto bad;
}
if (
/* the file has shrunk; trust it just appending the new data */
/* well, for now, anyway… since mksh strdups all into memory */
/* we can use a nicer approach some time later… */
;
} else if (
/* ignore changes when the file is too large */
sizenow <= MKSH_MAXHISTFSIZE
&&