X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/7ec92ad4ee942f41ebbc0229743f00cce1eba0aa..7aa88b299de9a4db2fd7199877a2fd354ba20d83:/doio.c diff --git a/doio.c b/doio.c index e1cc258..1f1d2a2 100644 --- a/doio.c +++ b/doio.c @@ -1,7 +1,7 @@ /* doio.c * * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, - * 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others + * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, by Larry Wall and others * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. @@ -76,7 +76,7 @@ Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw, bool was_fdopen = FALSE; bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0; char *type = NULL; - char mode[PERL_MODE_MAX]; /* stdio file mode ("r\0", "rb\0", "r+b\0" etc.) */ + char mode[PERL_MODE_MAX]; /* file mode ("r\0", "rb\0", "ab\0" etc.) */ SV *namesv; Zero(mode,sizeof(mode),char); @@ -188,14 +188,14 @@ Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw, STRLEN olen = len; char *tend; int dodup = 0; - PerlIO *that_fp = NULL; type = savepvn(oname, len); tend = type+len; SAVEFREEPV(type); /* Lose leading and trailing white space */ - for (; isSPACE(*type); type++) ; + while (isSPACE(*type)) + type++; while (tend > type && isSPACE(tend[-1])) *--tend = '\0'; @@ -234,7 +234,9 @@ Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw, } type++; } - for (type++; isSPACE(*type); type++) ; + do { + type++; + } while (isSPACE(*type)); if (!num_svs) { name = type; len = tend-type; @@ -256,17 +258,10 @@ Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw, } mode[0] = 'w'; writing = 1; -#ifdef HAS_STRLCAT if (out_raw) - strlcat(mode, "b", PERL_MODE_MAX); + my_strlcat(mode, "b", PERL_MODE_MAX - 1); else if (out_crlf) - strlcat(mode, "t", PERL_MODE_MAX); -#else - if (out_raw) - strcat(mode, "b"); - else if (out_crlf) - strcat(mode, "t"); -#endif + my_strlcat(mode, "t", PERL_MODE_MAX - 1); if (num_svs > 1) { fp = PerlProc_popen_list(mode, num_svs, svp); } @@ -294,17 +289,10 @@ Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw, } writing = 1; -#ifdef HAS_STRLCAT if (out_raw) - strlcat(mode, "b", PERL_MODE_MAX); + my_strlcat(mode, "b", PERL_MODE_MAX - 1); else if (out_crlf) - strlcat(mode, "t", PERL_MODE_MAX); -#else - if (out_raw) - strcat(mode, "b"); - else if (out_crlf) - strcat(mode, "t"); -#endif + my_strlcat(mode, "t", PERL_MODE_MAX - 1); if (*type == '&') { duplicity: dodup = PERLIO_DUP_FD; @@ -318,10 +306,12 @@ Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw, fp = supplied_fp; } else { + PerlIO *that_fp = NULL; if (num_svs > 1) { Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io)); } - for (; isSPACE(*type); type++) ; + while (isSPACE(*type)) + type++; if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) { fd = SvUV(*svp); num_svs = 0; @@ -335,8 +325,7 @@ Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw, thatio = sv_2io(*svp); } else { - GV *thatgv; - thatgv = gv_fetchpvn_flags(type, tend - type, + GV * const thatgv = gv_fetchpvn_flags(type, tend - type, 0, SVt_PVIO); thatio = GvIO(thatgv); } @@ -398,7 +387,8 @@ Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw, } } /* & */ else { - for (; isSPACE(*type); type++) ; + while (isSPACE(*type)) + type++; if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) { type++; fp = PerlIO_stdout(); @@ -421,19 +411,14 @@ Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw, goto unknown_open_mode; } /* IoTYPE_WRONLY */ else if (*type == IoTYPE_RDONLY) { - for (type++; isSPACE(*type); type++) ; + do { + type++; + } while (isSPACE(*type)); mode[0] = 'r'; -#ifdef HAS_STRLCAT if (in_raw) - strlcat(mode, "b", PERL_MODE_MAX); + my_strlcat(mode, "b", PERL_MODE_MAX - 1); else if (in_crlf) - strlcat(mode, "t", PERL_MODE_MAX); -#else - if (in_raw) - strcat(mode, "b"); - else if (in_crlf) - strcat(mode, "t"); -#endif + my_strlcat(mode, "t", PERL_MODE_MAX - 1); if (*type == '&') { goto duplicity; } @@ -484,17 +469,10 @@ Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw, TAINT_PROPER("piped open"); mode[0] = 'r'; -#ifdef HAS_STRLCAT if (in_raw) - strlcat(mode, "b", PERL_MODE_MAX); + my_strlcat(mode, "b", PERL_MODE_MAX - 1); else if (in_crlf) - strlcat(mode, "t", PERL_MODE_MAX); -#else - if (in_raw) - strcat(mode, "b"); - else if (in_crlf) - strcat(mode, "t"); -#endif + my_strlcat(mode, "t", PERL_MODE_MAX - 1); if (num_svs > 1) { fp = PerlProc_popen_list(mode,num_svs,svp); @@ -504,7 +482,8 @@ Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw, } IoTYPE(io) = IoTYPE_PIPE; if (num_svs) { - for (; isSPACE(*type); type++) ; + while (isSPACE(*type)) + type++; if (*type) { if (PerlIO_apply_layers(aTHX_ fp, mode, type) != 0) { goto say_false; @@ -521,17 +500,10 @@ Perl_do_openn(pTHX_ GV *gv, register const char *oname, I32 len, int as_raw, ; mode[0] = 'r'; -#ifdef HAS_STRLCAT if (in_raw) - strlcat(mode, "b", PERL_MODE_MAX); + my_strlcat(mode, "b", PERL_MODE_MAX - 1); else if (in_crlf) - strlcat(mode, "t", PERL_MODE_MAX); -#else - if (in_raw) - strcat(mode, "b"); - else if (in_crlf) - strcat(mode, "t"); -#endif + my_strlcat(mode, "t", PERL_MODE_MAX - 1); if (*name == '-' && name[1] == '\0') { fp = PerlIO_stdin(); @@ -738,9 +710,9 @@ Perl_nextargv(pTHX_ register GV *gv) if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) { IoFLAGS(io) &= ~IOf_START; if (PL_inplace) { - if (!PL_argvout_stack) - PL_argvout_stack = newAV(); - av_push(PL_argvout_stack, SvREFCNT_inc_simple(PL_defoutgv)); + assert(PL_defoutgv); + Perl_av_create_and_push(aTHX_ &PL_argvout_stack, + SvREFCNT_inc_simple_NN(PL_defoutgv)); } } if (PL_filemode & (S_ISUID|S_ISGID)) { @@ -814,7 +786,7 @@ Perl_nextargv(pTHX_ register GV *gv) if (ckWARN_d(WARN_INPLACE)) Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't do inplace edit: %"SVf" would not be unique", - sv); + SVfARG(sv)); do_close(gv,FALSE); continue; } @@ -825,7 +797,7 @@ Perl_nextargv(pTHX_ register GV *gv) if (ckWARN_d(WARN_INPLACE)) Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't rename %s to %"SVf": %s, skipping file", - PL_oldname, (void*)sv, Strerror(errno)); + PL_oldname, SVfARG(sv), Strerror(errno)); do_close(gv,FALSE); continue; } @@ -842,7 +814,7 @@ Perl_nextargv(pTHX_ register GV *gv) if (ckWARN_d(WARN_INPLACE)) Perl_warner(aTHX_ packWARN(WARN_INPLACE), "Can't rename %s to %"SVf": %s, skipping file", - PL_oldname, sv, Strerror(errno) ); + PL_oldname, SVfARG(sv), Strerror(errno) ); do_close(gv,FALSE); continue; } @@ -930,7 +902,7 @@ Perl_nextargv(pTHX_ register GV *gv) if (io && (IoFLAGS(io) & IOf_ARGV) && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0) { - GV *oldout = (GV*)av_pop(PL_argvout_stack); + GV * const oldout = (GV*)av_pop(PL_argvout_stack); setdefout(oldout); SvREFCNT_dec(oldout); return NULL; @@ -1175,7 +1147,6 @@ my_chsize(int fd, Off_t length) /* code courtesy of William Kucharski */ #define HAS_CHSIZE - struct flock fl; Stat_t filebuf; if (PerlLIO_fstat(fd, &filebuf) < 0) @@ -1195,7 +1166,7 @@ my_chsize(int fd, Off_t length) } else { /* truncate length */ - + struct flock fl; fl.l_whence = 0; fl.l_len = 0; fl.l_start = length; @@ -1225,32 +1196,24 @@ bool Perl_do_print(pTHX_ register SV *sv, PerlIO *fp) { dVAR; - register const char *tmps; - STRLEN len; - U8 *tmpbuf = NULL; - bool happy = TRUE; - /* assuming fp is checked earlier */ if (!sv) return TRUE; - switch (SvTYPE(sv)) { - case SVt_NULL: - if (ckWARN(WARN_UNINITIALIZED)) - report_uninit(sv); - return TRUE; - case SVt_IV: - if (SvIOK(sv)) { - assert(!SvGMAGICAL(sv)); - if (SvIsUV(sv)) - PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv)); - else - PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv)); - return !PerlIO_error(fp); - } - /* FALL THROUGH */ - default: + if (SvTYPE(sv) == SVt_IV && SvIOK(sv)) { + assert(!SvGMAGICAL(sv)); + if (SvIsUV(sv)) + PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv)); + else + PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv)); + return !PerlIO_error(fp); + } + else { + STRLEN len; /* Do this first to trigger any overloading. */ - tmps = SvPV_const(sv, len); + const char *tmps = SvPV_const(sv, len); + U8 *tmpbuf = NULL; + bool happy = TRUE; + if (PerlIO_isutf8(fp)) { if (!SvUTF8(sv)) { /* We don't modify the original scalar. */ @@ -1261,7 +1224,7 @@ Perl_do_print(pTHX_ register SV *sv, PerlIO *fp) else if (DO_UTF8(sv)) { STRLEN tmplen = len; bool utf8 = TRUE; - U8 *result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8); + U8 * const result = bytes_from_utf8((const U8*) tmps, &tmplen, &utf8); if (!utf8) { tmpbuf = result; tmps = (char *) tmpbuf; @@ -1275,19 +1238,17 @@ Perl_do_print(pTHX_ register SV *sv, PerlIO *fp) } } } - break; - } - /* To detect whether the process is about to overstep its - * filesize limit we would need getrlimit(). We could then - * also transparently raise the limit with setrlimit() -- - * but only until the system hard limit/the filesystem limit, - * at which we would get EPERM. Note that when using buffered - * io the write failure can be delayed until the flush/close. --jhi */ - if (len && (PerlIO_write(fp,tmps,len) == 0)) - happy = FALSE; - if (tmpbuf) + /* To detect whether the process is about to overstep its + * filesize limit we would need getrlimit(). We could then + * also transparently raise the limit with setrlimit() -- + * but only until the system hard limit/the filesystem limit, + * at which we would get EPERM. Note that when using buffered + * io the write failure can be delayed until the flush/close. --jhi */ + if (len && (PerlIO_write(fp,tmps,len) == 0)) + happy = FALSE; Safefree(tmpbuf); - return happy ? !PerlIO_error(fp) : FALSE; + return happy ? !PerlIO_error(fp) : FALSE; + } } I32 @@ -1302,22 +1263,38 @@ Perl_my_stat(pTHX) EXTEND(SP,1); gv = cGVOP_gv; do_fstat: + if (gv == PL_defgv) + return PL_laststatval; io = GvIO(gv); - if (io && IoIFP(io)) { - PL_statgv = gv; - sv_setpvn(PL_statname,"", 0); - PL_laststype = OP_STAT; - return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache)); - } - else { - if (gv == PL_defgv) - return PL_laststatval; - if (ckWARN2(WARN_UNOPENED,WARN_CLOSED)) - report_evil_fh(gv, io, PL_op->op_type); - PL_statgv = NULL; - sv_setpvn(PL_statname,"", 0); - return (PL_laststatval = -1); - } + do_fstat_have_io: + PL_laststype = OP_STAT; + PL_statgv = gv; + sv_setpvn(PL_statname, "", 0); + if(io) { + if (IoIFP(io)) { + return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache)); + } else if (IoDIRP(io)) { +#ifdef HAS_DIRFD + return (PL_laststatval = PerlLIO_fstat(dirfd(IoDIRP(io)), &PL_statcache)); +#else + Perl_die(aTHX_ PL_no_func, "dirfd"); + /* NOT REACHED */ + return 0; + /* Can't use NORETURN_FUNCTION_END because Perl_die is not + * __attribute__noreturn__ + * Can't use DIE because that does not return an integer + */ +#endif + } else { + if (ckWARN2(WARN_UNOPENED,WARN_CLOSED)) + report_evil_fh(gv, io, PL_op->op_type); + return (PL_laststatval = -1); + } + } else { + if (ckWARN2(WARN_UNOPENED,WARN_CLOSED)) + report_evil_fh(gv, io, PL_op->op_type); + return (PL_laststatval = -1); + } } else if (PL_op->op_private & OPpFT_STACKED) { return PL_laststatval; @@ -1335,6 +1312,11 @@ Perl_my_stat(pTHX) gv = (GV*)SvRV(sv); goto do_fstat; } + else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO) { + io = (IO*)SvRV(sv); + gv = NULL; + goto do_fstat_have_io; + } s = SvPV_const(sv, len); PL_statgv = NULL; @@ -1390,6 +1372,19 @@ Perl_my_lstat(pTHX) return PL_laststatval; } +static void +S_exec_failed(pTHX_ const char *cmd, int fd, int do_report) +{ + const int e = errno; + if (ckWARN(WARN_EXEC)) + Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s", + cmd, Strerror(e)); + if (do_report) { + PerlLIO_write(fd, (void*)&e, sizeof(int)); + PerlLIO_close(fd); + } +} + bool Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp, int fd, int do_report) @@ -1422,15 +1417,7 @@ Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp, else PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv)); PERL_FPU_POST_EXEC - if (ckWARN(WARN_EXEC)) - Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s", - (really ? tmps : PL_Argv[0]), Strerror(errno)); - if (do_report) { - const int e = errno; - - PerlLIO_write(fd, (void*)&e, sizeof(int)); - PerlLIO_close(fd); - } + S_exec_failed(aTHX_ (really ? tmps : PL_Argv[0]), fd, do_report); } do_execfree(); #endif @@ -1455,13 +1442,14 @@ Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report) dVAR; register char **a; register char *s; + char *buf; char *cmd; /* Make a copy so we can change it */ - const int cmdlen = strlen(incmd); - Newx(cmd, cmdlen+1, char); - strncpy(cmd, incmd, cmdlen); - cmd[cmdlen] = 0; + const Size_t cmdlen = strlen(incmd) + 1; + Newx(buf, cmdlen, char); + cmd = buf; + my_strlcpy(cmd, incmd, cmdlen); while (*cmd && isSPACE(*cmd)) cmd++; @@ -1473,19 +1461,11 @@ Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report) char flags[PERL_FLAGS_MAX]; if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) { -#ifdef HAS_STRLCPY - strlcpy(flags, "-c", PERL_FLAGS_MAX); -#else - strcpy(flags,"-c"); -#endif + my_strlcpy(flags, "-c", PERL_FLAGS_MAX); s = cmd+PL_cshlen+3; if (*s == 'f') { s++; -#ifdef HAS_STRLCPY - strlcat(flags, "f", PERL_FLAGS_MAX); -#else - strcat(flags,"f"); -#endif + my_strlcat(flags, "f", PERL_FLAGS_MAX - 2); } if (*s == ' ') s++; @@ -1499,10 +1479,11 @@ Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report) if (s[-1] == '\'') { *--s = '\0'; PERL_FPU_PRE_EXEC - PerlProc_execl(PL_cshname,"csh", flags, ncmd, (char*)0); + PerlProc_execl(PL_cshname, "csh", flags, ncmd, (char*)NULL); PERL_FPU_POST_EXEC *s = '\''; - Safefree(cmd); + S_exec_failed(aTHX_ PL_cshname, fd, do_report); + Safefree(buf); return FALSE; } } @@ -1518,7 +1499,9 @@ Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report) if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4])) goto doshell; - for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */ + s = cmd; + while (isALNUM(*s)) + s++; /* catch VAR=val gizmo */ if (*s == '=') goto doshell; @@ -1545,9 +1528,10 @@ Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report) } doshell: PERL_FPU_PRE_EXEC - PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0); + PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char *)NULL); PERL_FPU_POST_EXEC - Safefree(cmd); + S_exec_failed(aTHX_ PL_sh_path, fd, do_report); + Safefree(buf); return FALSE; } } @@ -1556,10 +1540,12 @@ Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report) PL_Cmd = savepvn(cmd, s-cmd); a = PL_Argv; for (s = PL_Cmd; *s;) { - while (*s && isSPACE(*s)) s++; + while (isSPACE(*s)) + s++; if (*s) *(a++) = s; - while (*s && !isSPACE(*s)) s++; + while (*s && !isSPACE(*s)) + s++; if (*s) *s++ = '\0'; } @@ -1572,17 +1558,10 @@ Perl_do_exec3(pTHX_ const char *incmd, int fd, int do_report) do_execfree(); goto doshell; } - if (ckWARN(WARN_EXEC)) - Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s", - PL_Argv[0], Strerror(errno)); - if (do_report) { - const int e = errno; - PerlLIO_write(fd, (const void*)&e, sizeof(int)); - PerlLIO_close(fd); - } + S_exec_failed(aTHX_ PL_Argv[0], fd, do_report); } do_execfree(); - Safefree(cmd); + Safefree(buf); return FALSE; } @@ -2270,7 +2249,8 @@ Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp) SETERRNO(0,0); if (shmctl(id, IPC_STAT, &shmds) == -1) return -1; - if (mpos < 0 || msize < 0 || (size_t)mpos + msize > shmds.shm_segsz) { + if (mpos < 0 || msize < 0 + || (size_t)mpos + msize > (size_t)shmds.shm_segsz) { SETERRNO(EFAULT,SS_ACCVIO); /* can't do as caller requested */ return -1; } @@ -2295,12 +2275,10 @@ Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp) #endif } else { - I32 n; STRLEN len; const char *mbuf = SvPV_const(mstr, len); - if ((n = len) > msize) - n = msize; + const I32 n = ((I32)len > msize) ? msize : (I32)len; Copy(mbuf, shm + mpos, n, char); if (n < msize) memzero(shm + mpos + n, msize - n);