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@ -74,6 +74,8 @@ bin_sysread(char *nam, char **args, Options ops, UNUSED(int func))
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int infd = 0, outfd = -1, bufsize = SYSREAD_BUFSIZE, count;
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char *outvar = NULL, *countvar = NULL, *inbuf;
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errno = 0; /* Distinguish non-system errors */
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/* -i: input file descriptor if not stdin */
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if (OPT_ISSET(ops, 'i')) {
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infd = getposint(OPT_ARG(ops, 'i'), nam);
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@ -238,6 +240,8 @@ bin_syswrite(char *nam, char **args, Options ops, UNUSED(int func))
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int outfd = 1, len, count, totcount;
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char *countvar = NULL;
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errno = 0; /* Distinguish non-system errors */
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/* -o: output file descriptor if not stdout */
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if (OPT_ISSET(ops, 'o')) {
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outfd = getposint(OPT_ARG(ops, 'o'), nam);
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@ -303,6 +307,13 @@ static struct { const char *name; int oflag; } openopts[] = {
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{ "trunc", O_TRUNC }
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};
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/*
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* Return values of bin_sysopen:
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* 0 Success
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* 1 Error in parameters to command
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* 2 Error on open, ERRNO set by system
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*/
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/**/
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static int
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bin_sysopen(char *nam, char **args, Options ops, UNUSED(int func))
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@ -319,6 +330,8 @@ bin_sysopen(char *nam, char **args, Options ops, UNUSED(int func))
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int fdflags = 0;
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#endif
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errno = 0; /* Distinguish non-system errors */
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if (!OPT_ISSET(ops, 'u')) {
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zwarnnam(nam, "file descriptor not specified");
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return 1;
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@ -374,12 +387,12 @@ bin_sysopen(char *nam, char **args, Options ops, UNUSED(int func))
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if (fd == -1) {
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zwarnnam(nam, "can't open file %s: %e", *args, errno);
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return 1;
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return 2;
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}
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moved_fd = (explicit > -1) ? redup(fd, explicit) : movefd(fd);
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if (moved_fd == -1) {
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zwarnnam(nam, "can't open file %s", *args);
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return 1;
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return 2;
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}
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#ifdef FD_CLOEXEC
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@ -423,6 +436,8 @@ bin_sysseek(char *nam, char **args, Options ops, UNUSED(int func))
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char *whence;
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off_t pos;
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errno = 0; /* Distinguish non-system errors */
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/* -u: file descriptor if not stdin */
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if (OPT_ISSET(ops, 'u')) {
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fd = getposint(OPT_ARG(ops, 'u'), nam);
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