Don't call basename() and dirname() in an unportable way.
POSIX allows these functions to modify their input buffer, so that they have storage for the return value. Pull copies of the filename before calling these utility functions.
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=303443
@ -301,6 +301,7 @@ mf_fgets(SPACE *sp, enum e_spflag spflag)
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{
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struct stat sb;
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ssize_t len;
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char *dirbuf, *basebuf;
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static char *p = NULL;
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static size_t plen = 0;
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int c;
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@ -389,9 +390,14 @@ mf_fgets(SPACE *sp, enum e_spflag spflag)
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if ((size_t)len > sizeof(oldfname))
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errx(1, "%s: name too long", fname);
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}
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if ((dirbuf = strdup(fname)) == NULL ||
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(basebuf = strdup(fname)) == NULL)
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err(1, "strdup");
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len = snprintf(tmpfname, sizeof(tmpfname),
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"%s/.!%ld!%s", dirname(fname), (long)getpid(),
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basename(fname));
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"%s/.!%ld!%s", dirname(dirbuf), (long)getpid(),
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basename(basebuf));
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free(dirbuf);
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free(basebuf);
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if ((size_t)len >= sizeof(tmpfname))
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errx(1, "%s: name too long", fname);
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unlink(tmpfname);
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